Audison AF C4D Amplifier

--> <div class="wpb-content-wrapper"><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"> <h3 class="product_title entry-title"><span style="color: #3366ff;">Audison </span>AF C4D Amplifier</h3> <p>AF companions have a “straight wire” architecture, without analog preamp functions such as crossover filtering, and are intended for use with external processors. AF M4D boasts four high-fidelity amplified channels 90W x 4 @4Ω*, 150W x 4 @2Ω* with the audiophile sound of the latest generation Audison D-Class technology. Higher switching frequencies, steeper filtering, and higher-tolerance components deliver sound above and beyond the expectation of Class D – in an amazingly compact package! The audio band is extended up to 40 kHz earning the coveted High-Resolution certification. Bridging channel pairs results in 300W x 2 @4Ω*, guaranteeing flexible and powerful performance. *Output Continuous Power (RMS) @14.4 VDC, 1% THD, all channels driven.</p> </div> </div> <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_center 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_AF-C4D_PANNELLO_2022_05_11.jpg" width="2500" height="1000" alt="AUDISON_AF-C4D_PANNELLO_2022_05_11" title="AUDISON_AF-C4D_PANNELLO_2022_05_11" 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><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-12"><div class="vc_column-inner"><div class="wpb_wrapper"><div class="vc_tta-container" data-vc-action="collapseAll"><div class="vc_general vc_tta vc_tta-accordion vc_tta-color-sky vc_tta-style-classic vc_tta-shape-rounded vc_tta-spacing-1 vc_tta-controls-align-center vc_tta-o-all-clickable"><div class="vc_tta-panels-container"><div class="vc_tta-panels"><div class="vc_tta-panel" id="1731678339268-3908876b-3c97" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1731678339268-3908876b-3c97" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">AMPLIFIER TECH DATA</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>Channels</td> <td>4</td> </tr> <tr> <td>Class</td> <td>D-Class</td> </tr> <tr> <td>Efficiency</td> <td>84%</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 ÷ 15 VDC</td> </tr> <tr> <td>Operating power supply voltage</td> <td>6.5 ÷ 17.5 VDC</td> </tr> <tr> <td>Idling current</td> <td>0.004 A</td> </tr> <tr> <td>Idling current when off</td> <td>0.6 mA</td> </tr> <tr> <td>Consumption @ 14.4 VDC, 2Ω, Max Musical Power</td> <td>25 A</td> </tr> <tr> <td>Remote OUT</td> <td>6.5 ÷15 VDC (150 mA)</td> </tr> <tr> <td>Remote IN</td> <td>4 ÷15 VDC (1 mA)</td> </tr> <tr> <td>ART – Automatic Remote Turn on/off from OUTPUT BTL speakers (Selectable)</td> <td>1.5 VDC</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1731678339280-69f54a1e-1809" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1731678339280-69f54a1e-1809" 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>0,03%</td> </tr> <tr> <td>Bandwidth A</td> <td>(-3 dB, 2 VRMS, 4 Ω): 10Hz ÷ 40kHz</td> </tr> <tr> <td>S/N ratio A</td> <td>(A weighted @ 1 V): 102 dBA</td> </tr> <tr> <td>Damping factor A</td> <td>(1 kHz, 4Ω, 2 VRMS): 95</td> </tr> <tr> <td>Input sensitivity Pre-In</td> <td>0.6 ÷ 6 VRMS</td> </tr> <tr> <td>Input sensitivity Speaker-In</td> <td>2.2 ÷ 22 VRMS</td> </tr> <tr> <td>Total Power RMS</td> <td>600 W</td> </tr> <tr> <td>Minimum load impedance</td> <td>2Ω:</td> </tr> <tr> <td>Output Power (RMS) @14.4 VDC, 1% THD</td> <td> <p>4Ch @ 4Ω: 90 W x 4</p> <p>4Ch @ 2Ω: 150 W x 4</p> <p>2Ch (bridge) @ 4Ω: 300 W x 2</td> </tr> <tr> <td>Adjustable Crossover</td> <td>No</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1731678446080-6fc22c80-5ea1" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1731678446080-6fc22c80-5ea1" data-vc-accordion data-vc-container=".vc_tta-container"><span class="vc_tta-title-text">CEA SPECIFICATIONS</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>Output power @ 4Ω, 1% THD N, 14.4 V</td> <td>90 W x 4</td> </tr> <tr> <td>SN ratio (ref. 1W output)</td> <td>81 dBA</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1732808932985-725eb310-777f" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1732808932985-725eb310-777f" 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 / Speaker-In</td> </tr> <tr> <td>Remote Sub Volume</td> <td>±12 dB</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1733934993348-83ca51ad-c217" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1733934993348-83ca51ad-c217" 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>1 x 30 A</td> </tr> <tr> <td>Weight</td> <td>1.49 kg</td> </tr> </tbody> </table> </div> </div> </div></div><div class="vc_tta-panel" id="1733935014635-4f553b31-afc8" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1733935014635-4f553b31-afc8" 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"> <div class="float-start w-100 audi--product-description"> <div> <div class="col-lg-12 col-12 audi--column-info"> <div class="table-responsive-sm"> <table class="table caption-top"> <tbody> <tr class="hz--dimensions-has-image"> <td><a class="float-start mb-5 hz-image-dimensions" href="https://static.audison.com/media/2023/11/Audison_AFC4D_dim.png" data-fancybox="product_image_dimensions"><img decoding="async" class="mw-30" src="https://static.audison.com/media/2023/11/Audison_AFC4D_dim.png" alt="AF C4D" /></a></td> </tr> <tr class="hz--dimensions-has-image"> <td>Dimension A</td> <td>200 mm</td> </tr> <tr class="hz--dimensions-has-image"> <td>Dimension B</td> <td>47 mm</td> </tr> <tr class="hz--dimensions-has-image"> <td>Dimension C</td> <td>134 mm</td> </tr> </tbody> </table> </div> </div> </div> </div> </div> </div> </div></div><div class="vc_tta-panel" id="1733935048584-a75605e4-b4f8" data-vc-content=".vc_tta-panel-body"><div class="vc_tta-panel-heading"><h4 class="vc_tta-panel-title"><a href="#1733935048584-a75605e4-b4f8" 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>Improved audio performance and power thanks to the latest generation of ADT (Audison D-Class) technology</li> <li>Unbeatable power/volume ratio up to 0.47 W RMS/cm³ reaching 81% of efficiency</li> <li>Hi-Res compatibility performance, with an extended audio band up to 40 kHz</li> <li>Maximum versatility thanks to the possibility of using the bridging option for each pair of power outputs</li> </ul> </div> </div> </div></div></div></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_center 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/2024/08/audison_adt_low-300x131-1-100x44.webp" width="100" height="44" alt="audison_adt_low-300x131" title="audison_adt_low-300x131" loading="lazy" /></div> </figure> </div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <div class="float-start w-100 audi--headline-technologies">Audison D-Class technology</div> <div class="float-start w-100 audi--description-technologies audi--color-grey"> <p>ADT uses a switching frequency twice as fast as many other modern Class D amplifiers using very high-tolerance component parts to keep the timing correct even during temperature extremes. The higher switching frequency of Audison Class D moves noise much farther away from the audible band. Audison Class D amplifiers also use a steeper 4th-order analog lowpass filter, rather than the simpler 2nd-order lowpass filters usually used in competing designs. The steeper filter will keep noise much lower in amplitude – which is good for controlling EMI and preventing infrasonic noise from getting to the tweeters. It also keeps phase shift outside the audible range. The cost is higher – twice as many components are needed for a 4th-order filter compared to the usual 2nd-order filter, and each output channel needs its own filter – but Audison determined through exhaustive listening testing that this design was the best-sounding approach. </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"> <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/2024/08/audison_All_Channels_Driven-125x42.webp" width="125" height="42" alt="audison_All_Channels_Driven" title="audison_All_Channels_Driven" loading="lazy" /></div> </figure> </div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <p>The “All Channels Driven” design philosophy guarantees that the Audison amplifier delivers the rated power on all channels simultaneously. To reach that target, Audison designed the amplifier power supply to handle the cumulative power demand.</p> </div> </div> <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_center 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/2024/08/audison_Fully_bridgeable_low-125x42.webp" width="125" height="42" alt="audison_Fully_bridgeable_low" title="audison_Fully_bridgeable_low" loading="lazy" /></div> </figure> </div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <p>Maximum versatility thanks to the bridging option for each pair of channels.</p> </div> </div> <div class="wpb_single_image wpb_content_element vc_align_center 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/2024/08/HiResAudiologo-100x100.webp" width="100" height="100" alt="HiResAudiologo" title="HiResAudiologo" loading="lazy" /></div> </figure> </div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <p>According to the definition of Hi-Res audio provided by JAS (<a href="https://www.jas-audio.or.jp/english">Japan Audio Society</a>), this amplifier exceeds the above 40 kHz bandwith analog requirement.</p> </div> </div> <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_center 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/2024/08/Uss-1-300x132-1-100x46.webp" width="100" height="46" alt="Uss-1-300x132" title="Uss-1-300x132" loading="lazy" /></div> </figure> </div> <div class="wpb_text_column wpb_content_element" > <div class="wpb_wrapper"> <p>Universal Speaker Simulator technology on high-level inputs for maximum compatibility with any type of Head-Unit OEM Source</p> </div> </div> </div></div></div></div> </div><!-- Audison AF C4D Amplifier AF companions have a “straight wire” architecture, without analog preamp functions such as crossover filtering, and are intended for use with external processors. AF M4D boasts four high-fidelity amplified channels 90W x 4 @4Ω*, 150W x 4 @2Ω* with the audiophile sound of the latest generation Audison D-Class technology. Higher switching frequencies, steeper filtering, and higher-tolerance components deliver sound above and beyond the expectation of Class D – in an amazingly compact package! The audio band is extended up to 40 kHz earning the coveted High-Resolution certification. Bridging channel pairs results in 300W x 2 @4Ω*, guaranteeing flexible and powerful performance. *Output Continuous Power (RMS) @14.4 VDC, 1% THD, all channels driven. AMPLIFIER TECH DATA Channels 4 Class D-Class Efficiency 84% Hi Level Input Yes Low Level Input Yes Digital Input No Power supply voltage / fuse 11 ÷ 15 VDC Operating power supply voltage 6.5 ÷ 17.5 VDC Idling current 0.004 A Idling current when off 0.6 mA Consumption @ 14.4 VDC, 2Ω, Max Musical Power 25 A Remote OUT 6.5 ÷15 VDC (150 mA) Remote IN 4 ÷15 VDC (1 mA) ART – Automatic Remote Turn on/off from OUTPUT BTL speakers (Selectable) 1.5 VDC AMPLIFIER STAGE Distortion – THD @ 100 Hz, 4Ω, 70% Rated Power 0,03% Bandwidth A (-3 dB, 2 VRMS, 4 Ω): 10Hz ÷ 40kHz S/N ratio A (A weighted @ 1 V): 102 dBA Damping factor A (1 kHz, 4Ω, 2 VRMS): 95 Input sensitivity Pre-In 0.6 ÷ 6 VRMS Input sensitivity Speaker-In 2.2 ÷ 22 VRMS Total Power RMS 600 W Minimum load impedance 2Ω: Output Power (RMS) @14.4 VDC, 1% THD 4Ch @ 4Ω: 90 W x 4 4Ch @ 2Ω: 150 W x 4 2Ch (bridge) @ 4Ω: 300 W x 2 Adjustable Crossover No CEA SPECIFICATIONS Output power @ 4Ω, 1% THD N, 14.4 V 90 W x 4 SN ratio (ref. 1W output) 81 dBA INPUTS Input Type Pre-In / Speaker-In Remote Sub Volume ±12 dB OTHER Fuse 1 x 30 A Weight 1.49 kg DIMENSIONS Dimension A 200 mm Dimension B 47 mm Dimension C 134 mm FEATURES Improved audio performance and power thanks to the latest generation of ADT (Audison D-Class) technology Unbeatable power/volume ratio up to 0.47 W RMS/cm³ reaching 81% of efficiency Hi-Res compatibility performance, with an extended audio band up to 40 kHz Maximum versatility thanks to the possibility of using the bridging option for each pair of power outputs Audison D-Class technology ADT uses a switching frequency twice as fast as many other modern Class D amplifiers using very high-tolerance component parts to keep the timing correct even during temperature extremes. The higher switching frequency of Audison Class D moves noise much farther away from the audible band. Audison Class D amplifiers also use a steeper 4th-order analog lowpass filter, rather than the simpler 2nd-order lowpass filters usually used in competing designs. The steeper filter will keep noise much lower in amplitude – which is good for controlling EMI and preventing infrasonic noise from getting to the tweeters. It also keeps phase shift outside the audible range. The cost is higher – twice as many components are needed for a 4th-order filter compared to the usual 2nd-order filter, and each output channel needs its own filter – but Audison determined through exhaustive listening testing that this design was the best-sounding approach. The “All Channels Driven” design philosophy guarantees that the Audison amplifier delivers the rated power on all channels simultaneously. To reach that target, Audison designed the amplifier power supply to handle the cumulative power demand. Maximum versatility thanks to the bridging option for each pair of channels. According to the definition of Hi-Res audio provided by JAS (Japan Audio Society), this amplifier exceeds the above 40 kHz bandwith analog requirement. Universal Speaker Simulator technology on high-level inputs for maximum compatibility with any type of Head-Unit OEM Source