Audison HV Venti Amplifier

--> <div class="wpb-content-wrapper"><div data-vc-full-width="true" data-vc-full-width-temp="true" data-vc-full-width-init="false" data-vc-parallax="2" data-vc-parallax-image="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/989765.jpg" class="vc_row wpb_row vc_row-fluid vc_row-has-fill vc_general vc_parallax vc_parallax-content-moving"><div class="wpb_column vc_column_container vc_col-sm-3"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div><div class="wpb_images_carousel wpb_content_element vc_clearfix wpb_content_element"><div class="wpb_wrapper"><div id="vc_images-carousel-1-1776778188" data-ride="vc_carousel" data-wrap="true" style="width: 600px;" data-interval="1800" data-auto-height="yes" data-mode="horizontal" data-partial="false" data-per-view="1" data-hide-on-end="false" class="vc_slide vc_images_carousel"><div class="vc_carousel-inner"><div class="vc_carousel-slideline"><div class="vc_carousel-slideline-inner"><div class="vc_item"><div class="vc_inner"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/theis-600x450.png" width="600" height="450" alt="theis" title="theis" loading="lazy" /></div></div><div class="vc_item"><div class="vc_inner"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/the-600x450.png" width="600" height="450" alt="the" title="the" loading="lazy" /></div></div><div class="vc_item"><div class="vc_inner"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/the2-600x450.png" width="600" height="450" alt="the2" title="the2" loading="lazy" /></div></div></div></div></div></div></div></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-3"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row-full-width vc_clearfix"></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-12"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="wpb_images_carousel wpb_content_element vc_clearfix wpb_content_element"><div class="wpb_wrapper"><div id="vc_images-carousel-2-1776778188" data-ride="vc_carousel" data-wrap="true" style="width: 400px;" data-interval="5000" data-auto-height="yes" data-mode="horizontal" data-partial="false" data-per-view="1" data-hide-on-end="false" class="vc_slide vc_images_carousel"><div class="vc_carousel-inner"><div class="vc_carousel-slideline"><div class="vc_carousel-slideline-inner"><div class="vc_item"><div class="vc_inner"><a class="" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/theis-1024x1024.png" data-lightbox="lightbox[rel-832-3707962713]"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/theis-400x400.png" width="400" height="400" alt="theis" title="theis" loading="lazy" /></a></div></div><div class="vc_item"><div class="vc_inner"><a class="" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/the-1024x1024.png" data-lightbox="lightbox[rel-832-3707962713]"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/the-400x400.png" width="400" height="400" alt="the" title="the" loading="lazy" /></a></div></div><div class="vc_item"><div class="vc_inner"><a class="" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/thesis3-1024x1024.png" data-lightbox="lightbox[rel-832-3707962713]"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/thesis3-400x400.png" width="400" height="400" alt="thesis3" title="thesis3" loading="lazy" /></a></div></div><div class="vc_item"><div class="vc_inner"><a class="" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/the2-1024x1024.png" data-lightbox="lightbox[rel-832-3707962713]"><img decoding="async" class="" src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/the2-400x400.png" width="400" height="400" alt="the2" title="the2" loading="lazy" /></a></div></div></div></div></div><a class="vc_left vc_carousel-control" href="#vc_images-carousel-2-1776778188" data-slide="prev"><span class="icon-prev"></span></a><a class="vc_right vc_carousel-control" href="#vc_images-carousel-2-1776778188" data-slide="next"><span class="icon-next"></span></a></div></div></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h2 class="float-start w-100 audi--product-title audi--product-title-no-translations "><span style="color: #3366ff;">HV venti</span></h2> <h3 class="float-start w-100 audi--product-title audi--product-title-no-translations "><span class="h3 audi--product-subtitle">Amplifier | 1600 W total power | 2 x 800 W @ 2ohm | A-class</span></h3> <div class="float-start w-100 audi--product-description"> <div class="audi--product-description-paragraph"> <p>The Audison Thesis HV Venti is a Dual Mono stereo amplifier designed to meet the highest Hi-End standards, resulting from extensive research and development to achieve uncompromised performance. This amplifier represents the pinnacle of audio technology, with features that make it unique in its class.</p> </div> </div> </div> </div> </div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-12"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <p>The Dual Mono configuration of the HV Venti uses four Synchro-PWM power supplies that ensure an extremely fast response to current transients, enhancing sound quality. The input circuit is fully balanced up to the final stage, while the amplifier’s entire configuration avoids electromagnetic interference by routing outside the main board.</p> <p>Another significant innovation of the HV Venti is its output stage, based on a hybrid MOSFET-BJT topology, which uses discrete devices to enhance efficiency and power dissipation. This solution allows maintaining a high bias current on each output device, thereby increasing Class A efficiency.</p> <p>The HV Venti offers a Dual Power function that allows configuring the output in two modes: Hi Current and Hi Power. This flexibility enables the amplifier to adapt to the impedance and power handling specifications of the connected speakers, optimizing audio performance according to specific needs.</p> <p>To ensure the highest sound quality, the preamplifier uses fully balanced JFET differential stages with an output buffer for the control unit. Additionally, the progressive cooling system ensures that the operating temperature of active elements remains constant, positively influencing sound quality.</p> <p>The amplifier features a scratch-resistant tempered glass and strategically placed white, red, and blue LED lights, allowing you to admire the complexity and beauty of its internal design.</p> <p>In summary, the Audison Thesis HV Venti is an amplifier that combines technological innovation, elegant design, and unparalleled audio performance, positioning itself as a benchmark in the Hi-End mobile electronics world.</p> </div> </div> </div></div></div></div><div data-vc-full-width="true" data-vc-full-width-temp="true" data-vc-full-width-init="false" data-vc-parallax="1.5" data-vc-parallax-image="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/454-scaled.jpg" class="vc_row wpb_row vc_row-fluid vc_custom_1728910728985 vc_row-has-fill vc_general vc_parallax vc_parallax-content-moving"><div class="wpb_column vc_column_container vc_col-sm-12 vc_col-has-fill"><div class="vc_column-inner vc_custom_1728910581180"><div class="wpb_wrapper"><div class="vc_empty_space vc_custom_1728910518356" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_video_widget wpb_content_element vc_clearfix vc_custom_1728910968405 vc_video-aspect-ratio-169 vc_video-el-width-70 vc_video-align-center" > <div class="wpb_wrapper"> <div class="wpb_video_wrapper"><iframe data-placeholder-image="https://www.audiofile-incar.co.uk/wp-content/uploads/complianz/placeholders/youtube2fg0HmDtNNI-maxresdefault.webp" data-category="marketing" data-service="youtube" class="cmplz-placeholder-element cmplz-iframe cmplz-iframe-styles cmplz-video " data-cmplz-target="src" data-src-cmplz="https://www.youtube.com/embed/2fg0HmDtNNI?feature=oembed" data-deferlazy="1" title="Audison HV venti - "The Amplifier"" width="500" height="281" src="about:blank" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></div> </div> </div> <div class="vc_empty_space vc_custom_1728910529820" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row-full-width vc_clearfix"></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-12"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_tta-container vc_tta-o-non-responsive" data-vc-action="collapse" data-vc-tta-autoplay="{"delay":5000}"><div class="vc_general vc_tta vc_tta-tabs vc_tta-o-shape-group vc_tta-has-pagination vc_tta-o-no-fill vc_tta-tabs-position-top vc_tta-pageable"><div class="vc_tta-panels-container"> <ul aria-label="Pagination" class="vc_general vc_pagination vc_pagination-style-outline vc_pagination-shape-square vc_pagination-color-sky"> <li class="vc_pagination-item vc_active" data-vc-tab> <a aria-label="Pagination Item 1" href="#1728565749507-3d526215-d796" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> <li class="vc_pagination-item" data-vc-tab> <a aria-label="Pagination Item 2" href="#1728565794683-70c4ee55-b3d1" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> <li class="vc_pagination-item" data-vc-tab> <a aria-label="Pagination Item 3" href="#1728565923766-c11bef33-abbd" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> <li class="vc_pagination-item" data-vc-tab> <a aria-label="Pagination Item 4" href="#1728565967887-b3676a4c-5954" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> <li class="vc_pagination-item" data-vc-tab> <a aria-label="Pagination Item 5" href="#1728565964711-32faf110-b45c" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> <li class="vc_pagination-item" data-vc-tab> <a aria-label="Pagination Item 6" href="#1728565962674-c525ce0c-a7b7" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> <li class="vc_pagination-item" data-vc-tab> <a aria-label="Pagination Item 7" href="#1728565957504-6ea30a26-5852" class="vc_pagination-trigger" data-vc-tabs data-vc-container=".vc_tta"></a> </li> </ul> <div class="vc_tta-panels"><div class="vc_tta-panel vc_active" id="1728565749507-3d526215-d796" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565749507-3d526215-d796"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h2 class="audi--product-overview-area-headline"><span style="color: #808080;">DUAL MONO CONSTRUCTION</span></h2> <div class="audi--product-overview-area-description"> <p>Four Synchro-PWM power supplies allow a very fast transient current response and create a Dual Mono configuration.</p> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-3296203222]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features01.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features01-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features01" title="audison-thesis-productpage-product-features01" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div><div class="vc_tta-panel" id="1728565794683-70c4ee55-b3d1" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565794683-70c4ee55-b3d1"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h2 class="audi--product-overview-area-headline audi--text-right"><span style="color: #808080;">MOSFET-BJT HYBRID CONFIGURATION</span></h2> <div class="audi--product-overview-area-description audi--text-right"> <p>HV venti employs a unique output power stage topology, discrete IGBT, made by two Hitachi DMOS driving two pairs of complementary Sanken power BJT, each rated for 30A peak current and 200 W dissipation</p> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-4069841485]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features02.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features02-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features02" title="audison-thesis-productpage-product-features02" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div><div class="vc_tta-panel" id="1728565923766-c11bef33-abbd" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565923766-c11bef33-abbd"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h2 class="audi--product-overview-area-headline"><span style="color: #808080;">A-CLASS PREAMPLIFIER AND DRIVER</span></h2> <div class="audi--product-overview-area-description"> <p>It is made of two groups, Front End pre-amplifier and control unit. The whole stage is balanced up to the driver outputs. The power supply voltage is 90 V and is specific for this stage and dedicated to the two separate channels. The separate 150 V power supply is thermally stabilized and A Class biasing. Input is balanced with the first stage, complementary JFET differential and the second stage, complementary BJT differential. The voltage amplifier is Cascode type with a buffer to drive the output stage.</p> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-2561566701]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features03.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features03-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features03" title="audison-thesis-productpage-product-features03" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div><div class="vc_tta-panel" id="1728565967887-b3676a4c-5954" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565967887-b3676a4c-5954"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <div class="elementor-element elementor-element-4fc7b23b elementor-widget elementor-widget-heading" data-id="4fc7b23b" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h2 class="elementor-heading-title elementor-size-default"><span style="color: #808080;">OUTPUT POWER STAGE</span></h2> </div> </div> <div class="elementor-element elementor-element-5efb6d69 audi--scroll-text audi--scroll-text-350 elementor-widget elementor-widget-text-editor" data-id="5efb6d69" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p>The output power stage is based on an innovative topology similar to IGBT (Insulated Gate Bipolar Transistor) but employing discrete devices.<br /> The circuit is made from a complementary pair of Hitachi DMOS drivers, usually used as output stage devices (such as in HR100), which drive two pairs of SANKEN power BJT transistors providing each with 30 A peak current capability and 200 W dissipation.<br /> This solution allowed the use of only two pairs of output devices,<br /> thus permitting bias currents which necessarily have to be shared according to the number of output devices in parallel to be reduced; therefore, increasing the bias current value on every output device is possible, keeping the total current absorbed by the amplifier stable when in idling status. All this leads to the increase of the output stage to A class value.<br /> The percentage of A Class and consequently the idling current<br /> can be adjusted via the BIAS current diverter. As a result of the<br /> configuration of the HV venti in Hi Power or Hi Current mode, there will be a variation of the A Class percentage and therefore of the idling current also.</p> </div> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-1161115483]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features00.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features00-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features00" title="audison-thesis-productpage-product-features00" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div><div class="vc_tta-panel" id="1728565964711-32faf110-b45c" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565964711-32faf110-b45c"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <div class="elementor-element elementor-element-1c2ae0c5 elementor-widget elementor-widget-heading" data-id="1c2ae0c5" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h2 class="elementor-heading-title elementor-size-default"><span style="color: #808080;">CROSSOVER</span></h2> </div> </div> <div class="elementor-element elementor-element-779f299d audi--scroll-text audi--scroll-text-350 elementor-widget elementor-widget-text-editor" data-id="779f299d" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p>To guarantee maximum sound quality, the crossover was made on a separate module supplied with the product.<br /> Available adjustments are Hi Pass/Lo Pass 12 dB and Lo Pass<br /> 24 dB mono. Four cut-off frequencies are selectable for the filter<br /> (45; 55; 65; 80 Hz). Although this solution is limiting compared<br /> to a continuously adjustable cut-off, filter linearity is drastically<br /> improved and long signal paths are avoided.</p> </div> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-3760654952]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features03.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features03-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features03" title="audison-thesis-productpage-product-features03" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div><div class="vc_tta-panel" id="1728565962674-c525ce0c-a7b7" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565962674-c525ce0c-a7b7"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <div class="elementor-element elementor-element-54e0e453 elementor-widget elementor-widget-heading" data-id="54e0e453" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h2 class="elementor-heading-title elementor-size-default"><span style="color: #808080;">PREAMPLIFIER AND DRIVER</span></h2> </div> </div> <div class="elementor-element elementor-element-54b23f2a audi--scroll-text audi--scroll-text-350 elementor-widget elementor-widget-text-editor" data-id="54b23f2a" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p>It is made of two groups, Front End pre-amplifier and control unit.<br /> The whole stage is balanced up to the driver outputs. The power<br /> supply voltage is 90 V and is specific for this stage and dedicated<br /> to the two separate channels.<br /> The separate 150 V power supply is thermally stabilized and A Class biasing. Input is balanced with the first stage, complementary JFET differential and the second stage, complementary BJT differential. The voltage amplifier is Cascode type with a buffer to drive the output stage.</p> </div> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-2370745855]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features01.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features01-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features01" title="audison-thesis-productpage-product-features01" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div><div class="vc_tta-panel" id="1728565957504-6ea30a26-5852" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-body"> <span class="vc_tta-panel-title"> <a data-vc-container=".vc_tta-container" data-vc-accordion="" data-vc-target="#1728565957504-6ea30a26-5852"></a> </span> <div class="vc_row wpb_row vc_inner vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <div class="elementor-element elementor-element-4e4e5547 elementor-widget elementor-widget-heading" data-id="4e4e5547" data-element_type="widget" data-widget_type="heading.default"> <div class="elementor-widget-container"> <h2 class="elementor-heading-title elementor-size-default"><span style="color: #808080;">POWER SUPPLIES</span></h2> </div> </div> <div class="elementor-element elementor-element-34319e51 audi--scroll-text audi--scroll-text-350 elementor-widget elementor-widget-text-editor" data-id="34319e51" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p>The product features two Hi power supplies for each channel<br /> providing power exclusively to the Dual-Mono output stage.<br /> Each channel power supply pair works in Synchro-PMW mode: an<br /> independent circuit controls each of them.<br /> However, they are synchronized with one another and are designed to supply one single power source, one supplies the positive and the other the negative power. This solution allows engineers to increase the impulsive current transient response necessary to the amplifier.<br /> Furthermore, the two pairs of power supplies were synchronized to reduce radio frequency electro-magnetic interference.<br /> The layout featuring four separate power supplies has allowed<br /> the use of a single powerful MOSFET for each power supply rail,<br /> thus avoiding the paralleled configuration that is perhaps the main cause of amplifiers failures.<br /> Each transformer and related filter inductor were enclosed in nonmagnetic metallic shells and then filled with resin.<br /> This procedure further increases reliability for two reasons: first<br /> of all, coils are blocked and therefore made immune to vibrations;<br /> secondly, heat is homogeneously distributed, thus preventing any<br /> possible overheated areas.<br /> The resin-filled groups were then mounted onto the aluminium<br /> thick bottom plate to allow heat to be dissipated through side<br /> heatsinks.<br /> In order to avoid this kind of situation, you are often forced to use<br /> convoluted wiring which compel designers to accept compromises.<br /> Compromise is not accepted in the HV venti. Inside the HV venti a six layer thick copper board was used to gather all output stage<br /> return currents; the layout was created so that each current path<br /> comes close with the return current flowing backwards. This way<br /> the electro-magnetic fields are out of phase and nullify each other: this solution could be defined as a “<strong>balanced power supply</strong>”.</p> </div> </div> </div> </div> </div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_center wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <a class="" data-lightbox="lightbox[rel-832-2720105900]" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features02.webp" target="_self" class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/audison-thesis-productpage-product-features02-400x400.webp" width="400" height="400" alt="audison-thesis-productpage-product-features02" title="audison-thesis-productpage-product-features02" loading="lazy" /></a> </figure> </div> </div></div></div></div></div></div></div></div></div></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-12"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div data-vc-full-width="true" data-vc-full-width-temp="true" data-vc-full-width-init="false" class="vc_row wpb_row vc_row-fluid vc_custom_1728911276070 vc_row-has-fill"><div class="wpb_column vc_column_container vc_col-sm-12 vc_col-has-fill"><div class="vc_column-inner vc_custom_1728911264050"><div class="wpb_wrapper"><div class="vc_tta-container" data-vc-action="collapse"><div class="vc_general vc_tta vc_tta-tabs vc_tta-color-grey vc_tta-style-classic vc_tta-shape-rounded vc_tta-spacing-1 vc_tta-tabs-position-left vc_tta-controls-align-left vc_custom_1728911101778"><div class="vc_tta-tabs-container"><ul class="vc_tta-tabs-list" role="tablist"><li class="vc_tta-tab vc_active" data-vc-tab role="presentation"><a href="#1728566885554-9b5f6e9a-57d5" data-vc-tabs data-vc-container=".vc_tta" role="tab" aria-selected="false" id="tab-1728566885554-9b5f6e9a-57d5"><span class="vc_tta-title-text">Tech Data</span></a></li><li class="vc_tta-tab" data-vc-tab role="presentation"><a href="#1728566918628-2c1c03f2-3918" data-vc-tabs data-vc-container=".vc_tta" role="tab" aria-selected="false" id="tab-1728566918628-2c1c03f2-3918"><span class="vc_tta-title-text">Amplifier Stage</span></a></li><li class="vc_tta-tab" data-vc-tab role="presentation"><a href="#1728566943728-33512427-1762" data-vc-tabs data-vc-container=".vc_tta" role="tab" aria-selected="false" id="tab-1728566943728-33512427-1762"><span class="vc_tta-title-text">Inputs</span></a></li><li class="vc_tta-tab" data-vc-tab role="presentation"><a href="#1728566972796-03d41c7b-14ce" data-vc-tabs data-vc-container=".vc_tta" role="tab" aria-selected="false" id="tab-1728566972796-03d41c7b-14ce"><span class="vc_tta-title-text">Other</span></a></li><li class="vc_tta-tab" data-vc-tab role="presentation"><a href="#1728567005696-61e40b6d-39ff" data-vc-tabs data-vc-container=".vc_tta" role="tab" aria-selected="false" id="tab-1728567005696-61e40b6d-39ff"><span class="vc_tta-title-text">Dimensions</span></a></li><li class="vc_tta-tab" data-vc-tab role="presentation"><a href="#1728567426433-b450c188-48e8" data-vc-tabs data-vc-container=".vc_tta" role="tab" aria-selected="false" id="tab-1728567426433-b450c188-48e8"><span class="vc_tta-title-text">Features</span></a></li></ul></div><div class="vc_tta-panels-container"><div class="vc_tta-panels"><div class="vc_tta-panel vc_active" id="1728566885554-9b5f6e9a-57d5" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1728566885554-9b5f6e9a-57d5" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">Tech Data</span></a></h4></div><div class="vc_tta-panel-body"> <div class="wpb_text_column wpb_content_element vc_custom_1728911289971" > <div class="wpb_wrapper"> <table class="table caption-top"> <tbody> <tr> <td>Channels</td> <td>2</td> </tr> <tr> <td>Class</td> <td>A-Class</td> </tr> <tr> <td>Hi Level Input</td> <td>Yes</td> </tr> <tr> <td>Low Level Input</td> <td>Yes</td> </tr> <tr> <td>Digital Input</td> <td>No</td> </tr> <tr> <td>Power supply voltage / fuse</td> <td>11 ÷ 16 VDC</td> </tr> <tr> <td>Idling current</td> <td>4.2 A</td> </tr> <tr> <td>Idling current when off</td> <td>0.006 mA</td> </tr> <tr> <td>Consumption @ 14.4 VDC, 2Ω, Max Musical Power</td> <td>90 A</td> </tr> <tr> <td>Remote IN</td> <td>7 ÷ 16 VDC – 1 mA</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1728566918628-2c1c03f2-3918" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1728566918628-2c1c03f2-3918" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">Amplifier Stage</span></a></h4></div><div class="vc_tta-panel-body"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <table class="table caption-top"> <tbody> <tr> <td>Distortion – THD @ 100 Hz, 4Ω, 70% Rated Power</td> <td><0.05%</td> </tr> <tr> <td>Bandwidth A</td> <td>(-3 dB, 2 VRMS, 4 Ω): 4Hz ÷ 75 kHz</td> </tr> <tr> <td>S/N ratio A</td> <td>(A weighed @1 V): 100 dB</td> </tr> <tr> <td>Damping factor A</td> <td>(1kHz, 4 Ohms): 80</td> </tr> <tr> <td>Input sensitivity Pre-In</td> <td>Input sensitivity (high): 0.25 ÷ 1.6 VRMS Input sensitivity (low): 1 ÷ 7 VRMS</td> </tr> <tr> <td>Total Power RMS</td> <td>1600 W</td> </tr> <tr> <td>Output Power (RMS) @14.4 VDC, 1% THD</td> <td>• 2 Ch: 400 W x 2 (4Ω)</p> <p>• 2 Ch: 800 W x 2 (2Ω)</p> <p>• 1 Ch: 900 W x 1 (4Ω)</td> </tr> <tr> <td>Adjustable Crossover</td> <td>No</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1728566943728-33512427-1762" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1728566943728-33512427-1762" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">Inputs</span></a></h4></div><div class="vc_tta-panel-body"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <table class="table caption-top"> <tbody> <tr> <td>Input Type</td> <td>Pre IN: L/R (ABS)</td> </tr> <tr> <td>Filters Outputs</td> <td>Pre OUT (pre in bypass): L/R (ABS)</td> </tr> <tr> <td>Filter Pass A</td> <td>Crossover frequencies High pass & Low pass stereo 45 – 55 – 65 – 80Hz, 12dB/oct.</td> </tr> <tr> <td>Filter Pass B</td> <td>Crossover frequencies Lo-pass mono 45 – 55 – 65 – 80Hz, 24dB/oct.</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1728566972796-03d41c7b-14ce" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1728566972796-03d41c7b-14ce" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">Other</span></a></h4></div><div class="vc_tta-panel-body"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <table class="table caption-top"> <tbody> <tr> <td>Fuse</td> <td>100 A</td> </tr> <tr> <td>Other Fucntions</td> <td>Demo mode ext. supply: 12 VDC – 600 mA ; Ext. Cap terminals: 18 VDC cap min</td> </tr> <tr> <td>Weight</td> <td>15 kg</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1728567005696-61e40b6d-39ff" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1728567005696-61e40b6d-39ff" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">Dimensions</span></a></h4></div><div class="vc_tta-panel-body"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <table class="table caption-top"> <tbody> <tr> <td>Dimension A</td> <td>510 mm</td> </tr> <tr> <td>Dimension B</td> <td>85 mm</td> </tr> <tr> <td>Dimension C</td> <td>280 mm</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1728567426433-b450c188-48e8" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1728567426433-b450c188-48e8" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">Features</span></a></h4></div><div class="vc_tta-panel-body"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <ul> <li>Exclusive circuitry IGBT (Insulated Gate Bipolar Transistor).</li> <li>A Class preamplifier, intermediate stages and drivers.</li> <li>Dual Mono construction featuring four power supplies in Synchro-PWM<br /> configuration.</li> <li>Made exclusively with discrete components.</li> <li>Signal switching made exclusively with relays.</li> <li>Fully balanced input circuit.</li> <li>Power supply on separate board to eliminate interference.</li> <li>Dual Power’ function to switch between Hi-Current and Hi-Power.</li> <li>Bias Selector’ function to change the percentage in A Class.</li> <li>High quality crossover module supplied.</li> <li>5 mm aluminium chassis connecting two side cooling ducts.</li> </ul> </div> </div> </div></div></div></div></div></div></div></div></div></div><div class="vc_row-full-width vc_clearfix"></div><div class="vc_row wpb_row vc_row-fluid vc_row-o-content-middle vc_row-flex"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_single_image wpb_content_element vc_align_left wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <div class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/10/HiResAudiologo-300x300.webp" width="300" height="300" alt="HiResAudiologo" title="HiResAudiologo" loading="lazy" /></div> </figure> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h4 class="float-start w-100 audi--headline-technologies"><span style="color: #808080;">Hi-Res audio</span></h4> <div class="float-start w-100 audi--description-technologies audi--color-grey"> <p>According to the definition of HiRes audio provided by JAS (Japan Audio Society – jas-audio.or.jp), HV venti far exceed the above 40 kHz bandwith analog requirement, providing an astonishing 5 ÷ 75k Hz (@ -3 dB, 2 VRMS, 4 Ω).</p> </div> </div> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_single_image wpb_content_element vc_align_left wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <div class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/Audison_HVventi_jfet_diff_stage-1-768x493-1-300x300.webp" width="300" height="300" alt="Audison_HVventi_jfet_diff_stage-1-768x493" title="Audison_HVventi_jfet_diff_stage-1-768x493" loading="lazy" /></div> </figure> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h4 class="float-start w-100 audi--headline-technologies"><span style="color: #808080;">JFET DIFFERENTIAL STAGES</span></h4> <div class="float-start w-100 audi--description-technologies audi--color-grey"> <p>Fully balanced JFET differential preamplifier inputs with output buffer for control unit.</p> </div> </div> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_single_image wpb_content_element vc_align_left wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <div class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/Audison_HVventi_bjt-1-768x686-1-300x300.webp" width="300" height="300" alt="Audison_HVventi_bjt-1-768x686" title="Audison_HVventi_bjt-1-768x686" loading="lazy" /></div> </figure> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h4 class="float-start w-100 audi--headline-technologies"><span style="color: #808080;">MOSFET-BJT HYBRID CONFIGURATION</span></h4> <div class="float-start w-100 audi--description-technologies audi--color-grey"> <p>Unique output power stage topology, FUNCTION discrete IGBT, realized with a complementary pair of Hitachi DMOS driving two pair of complementary Sanken power BJT, each rated for 30A peak current and 200W dissipation.</p> </div> </div> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_single_image wpb_content_element vc_align_left wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <div class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/Audison_HVventi_Dual_Power-1-768x483-1-300x300.webp" width="300" height="300" alt="Audison_HVventi_Dual_Power-1-768x483" title="Audison_HVventi_Dual_Power-1-768x483" loading="lazy" /></div> </figure> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h4 class="float-start w-100 audi--headline-technologies"><span style="color: #808080;">DUAL POWER FUNCTION</span></h4> <div class="float-start w-100 audi--description-technologies audi--color-grey"> <p>A revolutionary function allowing the user to select the amplifiers output power configuration and the operating class.</p> </div> </div> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_single_image wpb_content_element vc_align_left wpb_content_element"> <figure class="wpb_wrapper vc_figure"> <div class="vc_single_image-wrapper vc_box_border_grey"><img decoding="async" class="vc_single_image-img " src="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/Audison_HVventi_dual_mono-1-300x300.webp" width="300" height="300" alt="Audison_HVventi_dual_mono-1" title="Audison_HVventi_dual_mono-1" loading="lazy" /></div> </figure> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <h4 class="float-start w-100 audi--headline-technologies"><span style="color: #808080;">DUAL MONO CONSTRUCTION</span></h4> <div class="float-start w-100 audi--description-technologies audi--color-grey"> <p>Four Synchro-PWM power supplies allow for a very fast transient current response and to create a Dual Mono configuration.</p> </div> </div> </div> <div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-12"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_empty_space" style="height: 32px"><span class="vc_empty_space_inner"></span></div></div></div></div></div><div class="vc_row wpb_row vc_row-fluid"><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_btn3-container vc_btn3-center vc_do_btn" ><a class="vc_general vc_btn3 vc_btn3-size-lg vc_btn3-shape-square vc_btn3-style-3d vc_btn3-color-grey" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/AUDISON_THESIS_HV_venti_Tech_Sheet_19B-1.pdf" title="">Manual</a></div></div></div></div><div class="wpb_column vc_column_container vc_col-sm-6"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_btn3-container vc_btn3-center vc_do_btn" ><a class="vc_general vc_btn3 vc_btn3-size-lg vc_btn3-shape-square vc_btn3-style-3d vc_btn3-color-grey" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/05/AUDISON_THESIS_HV_venti_Tech_Sheet_19B-1.pdf" title="">Tech Sheet</a></div></div></div></div></div> </div><!-- HV venti Amplifier | 1600 W total power | 2 x 800 W @ 2ohm | A-class The Audison Thesis HV Venti is a Dual Mono stereo amplifier designed to meet the highest Hi-End standards, resulting from extensive research and development to achieve uncompromised performance. This amplifier represents the pinnacle of audio technology, with features that make it unique in its class. The Dual Mono configuration of the HV Venti uses four Synchro-PWM power supplies that ensure an extremely fast response to current transients, enhancing sound quality. The input circuit is fully balanced up to the final stage, while the amplifier’s entire configuration avoids electromagnetic interference by routing outside the main board. Another significant innovation of the HV Venti is its output stage, based on a hybrid MOSFET-BJT topology, which uses discrete devices to enhance efficiency and power dissipation. This solution allows maintaining a high bias current on each output device, thereby increasing Class A efficiency. The HV Venti offers a Dual Power function that allows configuring the output in two modes: Hi Current and Hi Power. This flexibility enables the amplifier to adapt to the impedance and power handling specifications of the connected speakers, optimizing audio performance according to specific needs. To ensure the highest sound quality, the preamplifier uses fully balanced JFET differential stages with an output buffer for the control unit. Additionally, the progressive cooling system ensures that the operating temperature of active elements remains constant, positively influencing sound quality. The amplifier features a scratch-resistant tempered glass and strategically placed white, red, and blue LED lights, allowing you to admire the complexity and beauty of its internal design. In summary, the Audison Thesis HV Venti is an amplifier that combines technological innovation, elegant design, and unparalleled audio performance, positioning itself as a benchmark in the Hi-End mobile electronics world. DUAL MONO CONSTRUCTION Four Synchro-PWM power supplies allow a very fast transient current response and create a Dual Mono configuration. MOSFET-BJT HYBRID CONFIGURATION HV venti employs a unique output power stage topology, discrete IGBT, made by two Hitachi DMOS driving two pairs of complementary Sanken power BJT, each rated for 30A peak current and 200 W dissipation A-CLASS PREAMPLIFIER AND DRIVER It is made of two groups, Front End pre-amplifier and control unit. The whole stage is balanced up to the driver outputs. The power supply voltage is 90 V and is specific for this stage and dedicated to the two separate channels. The separate 150 V power supply is thermally stabilized and A Class biasing. Input is balanced with the first stage, complementary JFET differential and the second stage, complementary BJT differential. The voltage amplifier is Cascode type with a buffer to drive the output stage. OUTPUT POWER STAGE The output power stage is based on an innovative topology similar to IGBT (Insulated Gate Bipolar Transistor) but employing discrete devices. The circuit is made from a complementary pair of Hitachi DMOS drivers, usually used as output stage devices (such as in HR100), which drive two pairs of SANKEN power BJT transistors providing each with 30 A peak current capability and 200 W dissipation. This solution allowed the use of only two pairs of output devices, thus permitting bias currents which necessarily have to be shared according to the number of output devices in parallel to be reduced; therefore, increasing the bias current value on every output device is possible, keeping the total current absorbed by the amplifier stable when in idling status. All this leads to the increase of the output stage to A class value. The percentage of A Class and consequently the idling current can be adjusted via the BIAS current diverter. As a result of the configuration of the HV venti in Hi Power or Hi Current mode, there will be a variation of the A Class percentage and therefore of the idling current also. CROSSOVER To guarantee maximum sound quality, the crossover was made on a separate module supplied with the product. Available adjustments are Hi Pass/Lo Pass 12 dB and Lo Pass 24 dB mono. Four cut-off frequencies are selectable for the filter (45; 55; 65; 80 Hz). Although this solution is limiting compared to a continuously adjustable cut-off, filter linearity is drastically improved and long signal paths are avoided. PREAMPLIFIER AND DRIVER It is made of two groups, Front End pre-amplifier and control unit. The whole stage is balanced up to the driver outputs. The power supply voltage is 90 V and is specific for this stage and dedicated to the two separate channels. The separate 150 V power supply is thermally stabilized and A Class biasing. Input is balanced with the first stage, complementary JFET differential and the second stage, complementary BJT differential. The voltage amplifier is Cascode type with a buffer to drive the output stage. POWER SUPPLIES The product features two Hi power supplies for each channel providing power exclusively to the Dual-Mono output stage. Each channel power supply pair works in Synchro-PMW mode: an independent circuit controls each of them. However, they are synchronized with one another and are designed to supply one single power source, one supplies the positive and the other the negative power. This solution allows engineers to increase the impulsive current transient response necessary to the amplifier. Furthermore, the two pairs of power supplies were synchronized to reduce radio frequency electro-magnetic interference. The layout featuring four separate power supplies has allowed the use of a single powerful MOSFET for each power supply rail, thus avoiding the paralleled configuration that is perhaps the main cause of amplifiers failures. Each transformer and related filter inductor were enclosed in nonmagnetic metallic shells and then filled with resin. This procedure further increases reliability for two reasons: first of all, coils are blocked and therefore made immune to vibrations; secondly, heat is homogeneously distributed, thus preventing any possible overheated areas. The resin-filled groups were then mounted onto the aluminium thick bottom plate to allow heat to be dissipated through side heatsinks. In order to avoid this kind of situation, you are often forced to use convoluted wiring which compel designers to accept compromises. Compromise is not accepted in the HV venti. Inside the HV venti a six layer thick copper board was used to gather all output stage return currents; the layout was created so that each current path comes close with the return current flowing backwards. This way the electro-magnetic fields are out of phase and nullify each other: this solution could be defined as a “balanced power supply”. Tech DataAmplifier StageInputsOtherDimensionsFeaturesTech Data Channels 2 Class A-Class Hi Level Input Yes Low Level Input Yes Digital Input No Power supply voltage / fuse 11 ÷ 16 VDC Idling current 4.2 A Idling current when off 0.006 mA Consumption @ 14.4 VDC, 2Ω, Max Musical Power 90 A Remote IN 7 ÷ 16 VDC – 1 mA Amplifier Stage Distortion – THD @ 100 Hz, 4Ω, 70% Rated Power <0.05% Bandwidth A (-3 dB, 2 VRMS, 4 Ω): 4Hz ÷ 75 kHz S/N ratio A (A weighed @1 V): 100 dB Damping factor A (1kHz, 4 Ohms): 80 Input sensitivity Pre-In Input sensitivity (high): 0.25 ÷ 1.6 VRMS Input sensitivity (low): 1 ÷ 7 VRMS Total Power RMS 1600 W Output Power (RMS) @14.4 VDC, 1% THD • 2 Ch: 400 W x 2 (4Ω) • 2 Ch: 800 W x 2 (2Ω) • 1 Ch: 900 W x 1 (4Ω) Adjustable Crossover No Inputs Input Type Pre IN: L/R (ABS) Filters Outputs Pre OUT (pre in bypass): L/R (ABS) Filter Pass A Crossover frequencies High pass & Low pass stereo 45 – 55 – 65 – 80Hz, 12dB/oct. Filter Pass B Crossover frequencies Lo-pass mono 45 – 55 – 65 – 80Hz, 24dB/oct. Other Fuse 100 A Other Fucntions Demo mode ext. supply: 12 VDC – 600 mA ; Ext. Cap terminals: 18 VDC cap min Weight 15 kg Dimensions Dimension A 510 mm Dimension B 85 mm Dimension C 280 mm Features Exclusive circuitry IGBT (Insulated Gate Bipolar Transistor). A Class preamplifier, intermediate stages and drivers. Dual Mono construction featuring four power supplies in Synchro-PWM configuration. Made exclusively with discrete components. Signal switching made exclusively with relays. Fully balanced input circuit. Power supply on separate board to eliminate interference. Dual Power’ function to switch between Hi-Current and Hi-Power. Bias Selector’ function to change the percentage in A Class. High quality crossover module supplied. 5 mm aluminium chassis connecting two side cooling ducts. Hi-Res audio According to the definition of HiRes audio provided by JAS (Japan Audio Society – jas-audio.or.jp), HV venti far exceed the above 40 kHz bandwith analog requirement, providing an astonishing 5 ÷ 75k Hz (@ -3 dB, 2 VRMS, 4 Ω). JFET DIFFERENTIAL STAGES Fully balanced JFET differential preamplifier inputs with output buffer for control unit. MOSFET-BJT HYBRID CONFIGURATION Unique output power stage topology, FUNCTION discrete IGBT, realized with a complementary pair of Hitachi DMOS driving two pair of complementary Sanken power BJT, each rated for 30A peak current and 200W dissipation. DUAL POWER FUNCTION A revolutionary function allowing the user to select the amplifiers output power configuration and the operating class. DUAL MONO CONSTRUCTION Four Synchro-PWM power supplies allow for a very fast transient current response and to create a Dual Mono configuration. ManualTech Sheet