{"title":"4-Channel Amplifiers","description":null,"products":[{"product_id":"sundown-powersports-sam-100-4-400w-4-channel-marine-micro-amplifier-samv-2","title":"SAM-100.4 4-Channel Bluetooth Powersports Amplifier","description":"\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003e350 x 2 @ 4 ohms (bridged)\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e175 x 4 @ 2 ohms\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e100 x 4 @ 4 ohms\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB filter: 50Hz-500Hz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003ePower and protection indicators included\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eThermal, voltage, and speaker short protection circuitry\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eWaterproof (IP67 rated)\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eBluetooth receiver built-in\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eSealed wire\/signal bulkheads\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eGasketed audio control cover\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eRCA line out\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOur SAMv.2 amplifiers are ideal for your boat, bike or UTV. On the trail or on the road, this micro amplifier fits in tight spaces, but don’t let the size fool you - they pack some big power. SAM-series amps are rated IP67, certified to withstand full submersion when getting wild off-road, or when its time to clean up when the fun is done. Both of our multi-channel amps have built-in Bluetooth, so a source unit is not needed! Just sync to your phone and enjoy! Ready to go big? With the included line output, it’s easy to add additional amplifiers to the system.\u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386388144438,"sku":"PS-SAMv21004","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/products\/sundown-powersports-sam-1004-400w-4-channel-marine-micro-amplifier-samv2-896308.png?v=1689637012"},{"product_id":"sundown-audio-saev3-400-4-4-channel-400x4-car-audio-amplifier-amp","title":"SAEv4-100.4 4-Channel Amplifier","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"uk-width-1-2@m uk-first-column\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"page#1-0-0-0\" class=\"uk-margin\" data-mce-fragment=\"1\"\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cul\u003e\n\u003cli\u003e250 x 2 @ 4 ohms RMS (Bridged)\u003c\/li\u003e\n\u003cli\u003e125 x 4 @ 2 ohm RMS\u003c\/li\u003e\n\u003cli\u003e100 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli\u003eHi-fidelity Class A\/B design\u003c\/li\u003e\n\u003cli\u003eVariable 12dB low \u0026amp; high pass filters: 40Hz-5kHz\u003c\/li\u003e\n\u003cli\u003ePower and protection indicators included\u003c\/li\u003e\n\u003cli\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eThe SAEv4 is engineered with high-fidelity Class A\/B multi-channel architecture, providing an ideal balance between performance and affordability. Leveraging the latest half-bridge technology, these amplifiers deliver clean, powerful audio signals in a compact form factor.\u003c\/p\u003e\n\u003cp\u003eFeaturing an all-new chassis and heatsink design with 33% more aluminum, this SAEv4 keeps your system cool even during intense listening sessions. The amp is packed with a variable subsonic, high pass and low pass filters, plus a 4-way protection circuit (thermal, voltage, speaker short, and DC offset).\u003c\/p\u003e\n\u003cp\u003eWith an input sensitivity of 6V max and RMS power output of 125W x 4 at 2 ohms and 100W x 4 at 4 ohms, the SAEv4-100.4 is designed to drive your car audio system with precision and clarity. The variable crossover slope (LPF\/HPF) and a high signal-to-noise ratio of 92dB further enhance audio quality, with an exceptionally low noise floor.\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/SAEv4_Amp_manual_V2.pdf?v=1734368278\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386395025718,"sku":"A-SAEV41004","price":349.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/SAEv4-1004-000.png?v=1707164298"},{"product_id":"sundown-audio-sfb-1000-4-4-channel-1000x4-car-audio-amplifier-amp","title":"SFB-1000.4 4-Channel Amplifier","description":"\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003e1,000 x 4 @ 1 ohm RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e590 x 4 @ 2 ohms RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e350 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e4-channel full-range amplifier\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB low pass filter: 50Hz – 6kHz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB high pass filter: 15Hz – 6kHz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB Bass Boost @ 50Hz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003ePower, protection \u0026amp; clipping indicators included\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eOptional wired remote control with clipping indicator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIntroducing the Sundown Full Bridge line of amplifiers! The “Brazilian Style” SFB packs a powerful punch in a compact size, stable down to 1 ohm per channel.  Use the SFB to wire several speakers together on every channel - an ideal amp for a PA mid\/high speaker array, a large marine system, or your favorite set of separates. If you are looking for raw power on a budget –  look no further!\u003cbr\u003e\u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386395058486,"sku":"A-SFB10004","price":579.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/products\/sundown-audio-sfb-10004-4-channel-1000x4-car-audio-amplifieramp-876495.png?v=1689636954"},{"product_id":"sundown-audio-sfb-500-4-4-channel-500x4-car-audio-amplifier-amp","title":"SFB-500.4 4-Channel Amplifier","description":"\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003e500 x 4 @ 1 ohm RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e300 x 4 @ 2 ohms RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e200 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e4-channel full-range amplifier\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB low pass filter: 50Hz – 6kHz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB high pass filter: 15Hz – 6kHz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB Bass Boost @ 50Hz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003ePower, protection \u0026amp; clipping indicators included\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eOptional wired remote control with clipping indicator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIntroducing the Sundown Full Bridge line of amplifiers! The “Brazilian Style” SFB packs a powerful punch in a compact size, stable down to 1 ohm per channel.  Use the SFB to wire several speakers together on every channel - an ideal amp for a PA mid\/high speaker array, a large marine system, or your favorite set of separates. If you are looking for raw power on a budget –  look no further!\u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386395124022,"sku":"A-SFBV25004","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/products\/sundown-audio-sfb-5004-4-channel-500x4-car-audio-amplifieramp-585541.png?v=1689636977"},{"product_id":"sundown-audio-sfb-200-4-4-channel-200x4-car-audio-amplifier-amp","title":"Sundown Audio SFB-200.4 4-Channel Amplifier","description":"\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003e200 x 4 @ 1 ohm RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e125 x 4 @ 2 ohms RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e75 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e4-channel full-range amplifier\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB low pass filter: 50Hz – 6kHz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB high pass filter: 15Hz – 6kHz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eVariable 12dB Bass Boost @ 50Hz\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003ePower, protection \u0026amp; clipping indicators included\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eOptional wired remote control with clipping indicator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIntroducing the Sundown Full Bridge line of amplifiers! The “Brazilian Style” SFB packs a powerful punch in a compact size, stable down to 1 ohm per channel.  Use the SFB to wire several speakers together on every channel - an ideal amp for a PA mid\/high speaker array, a large marine system, or your favorite set of separates. If you are looking for raw power on a budget –  look no further!\u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386395287862,"sku":"A-SFBV22004","price":289.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/products\/sundown-audio-sfb-2004-4-channel-200x4-car-audio-amplifieramp-258783.png?v=1689637012"},{"product_id":"sundown-audio-salt-500-4-4-channel-500x4-car-audio-amplifier-amp","title":"SALT-500.4 4-Channel Amplifier","description":"\u003cul\u003e\n\u003cli\u003e1,400 x 2 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli\u003e700 x 4 @ 2 ohms RMS\u003c\/li\u003e\n\u003cli\u003e500 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli\u003e4-channel full-range amplifier: 10Hz – 25 kHz\u003c\/li\u003e\n\u003cli\u003eVariable 12dB subsonic filter: 10HZ - 500HZ\u003c\/li\u003e\n\u003cli\u003eVariable 12dB high \u0026amp; low pass filters: 50HZ - 500HZ  \u003c\/li\u003e\n\u003cli\u003eX1\/X10 crossover multiplier\u003c\/li\u003e\n\u003cli\u003ePower, clipping \u0026amp; protection indicators included\u003c\/li\u003e\n\u003cli\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003c\/li\u003e\n\u003cli\u003eOptional wired remote control displays voltage, temperature, and clipping display\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProducing optimum power at realistic voltages (the 12s, rather than needing 14+ volts), the SALT – Sundown Audio Low-Voltage Technology – is Sundown’s answer! SALT amplifiers represent the pinnacle of Korean Class-D amplifier technology. \u003c\/p\u003e\n\u003cp\u003eWhether you are a world-class SPL competitor or a hardcore sound quality fan, the SALT series will be your go-to choice to bring your speakers to life!  It's got easy-to-use 12dB subsonic and high\/low pass filters to customize your sound exactly as you like it. Plus, it has power, clipping, and protection indicators to keep everything running smoothly. The optional remote control lets you see voltage, temperature, and clipping with ease. With SALT amps you get all the control you’d ever need, incredible dynamics and the kind of power only Sundown can deliver! \u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386395418934,"sku":"A-SALT5004","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/products\/salt-5004-4-channel-500x4-amplifier-524266.png?v=1689636953"},{"product_id":"sundown-audio-salt-200-4-car-audio-4-channel-4x200-amplifier-amp","title":"SALT-200.4 4-Channel Amplifier","description":"\u003cp class=\"uk-margin\" id=\"page#1-0-0-0\"\u003e\u003c\/p\u003e\n\u003cp class=\"el-content uk-panel uk-margin-top\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e700 x 2 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli\u003e325 x 4 @ 2 ohms RMS\u003c\/li\u003e\n\u003cli\u003e200 x 4 @ 4 ohms RMS bridged\u003c\/li\u003e\n\u003cli\u003e4-channel full-range amplifier: 10Hz – 25 kHz\u003c\/li\u003e\n\u003cli\u003eVariable 12dB high \u0026amp; low pass filters: 50HZ - 500HZ  \u003c\/li\u003e\n\u003cli\u003eVariable 12dB subsonic filter: 10HZ - 500HZ\u003c\/li\u003e\n\u003cli\u003eX1\/X10 crossover multiplier\u003c\/li\u003e\n\u003cli\u003ePower, clipping \u0026amp; protection indicators included\u003c\/li\u003e\n\u003cli\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003c\/li\u003e\n\u003cli\u003eOptional wired remote control displays voltage, temperature, and clipping display\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProducing optimum power at realistic voltages (the 12s, rather than needing 14+ volts), the SALT – Sundown Audio Low-Voltage Technology – is Sundown’s answer! SALT amplifiers represent the pinnacle of Korean Class-D amplifier technology. Whether you are a world-class SPL competitor or a hardcore sound quality fan, the SALT series will be right at home in your system.\u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":45386395844918,"sku":"A-SALT2004","price":799.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/products\/salt-2004-4-channel-4x200-amplifier-588508.png?v=1689636905"},{"product_id":"saev4-150-4-225x4-4-channel-amplifier","title":"SAEv4-150.4 4-Channel Amplifier","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"uk-width-1-2@m uk-first-column\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"page#1-0-0-0\" class=\"uk-margin\" data-mce-fragment=\"1\"\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cul\u003e\n\u003cli\u003e450 x 2 @ 4 ohms RMS (Bridged)\u003c\/li\u003e\n\u003cli\u003e225 x 4 @ 2 ohm RMS\u003c\/li\u003e\n\u003cli\u003e150 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli\u003eHi-fidelity Class A\/B design\u003c\/li\u003e\n\u003cli\u003eVariable 12dB low \u0026amp; high pass filters: 40Hz-5kHz\u003c\/li\u003e\n\u003cli\u003ePower and protection indicators included\u003c\/li\u003e\n\u003cli\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe SAEv4 is engineered with high-fidelity Class A\/B multi-channel architecture, providing an ideal balance between performance and affordability. Leveraging the latest half-bridge technology, these amplifiers deliver clean, powerful audio signals in a compact form factor.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFeaturing an all-new chassis and heatsink design with 33% more aluminum, this SAEv4 keeps your system cool even during intense listening sessions. The amp is packed with a variable subsonic, high pass and low pass filters, plus a 4-way protection circuit (thermal, voltage, speaker short, and DC offset). \u003cspan\u003eThe variable crossover slope (LPF\/HPF) and a high signal-to-noise ratio of 92dB further enhance audio quality, with an exceptionally low noise floor.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWith an input sensitivity of 6 volts and up to 900 watts of output, this amp is ready, willing, and more than able to drive your car audio system with a new level of precision and clarity. \u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/SAEv4_Amp_manual_V2.pdf?v=1734368278\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":46890105766198,"sku":"A-SAEV41504","price":469.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/SAEv4-1504-000.png?v=1707164557"},{"product_id":"saev4-200-4-300x4-4-channel-amplifier","title":"SAEv4-200.4 4-Channel Amplifier","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"uk-width-1-2@m uk-first-column\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"uk-margin\" id=\"page#1-0-0-0\"\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cul\u003e\n\u003cli\u003e600 x 2 @ 4 ohms RMS (Bridged)\u003c\/li\u003e\n\u003cli\u003e300 x 4 @ 2 ohm RMS\u003c\/li\u003e\n\u003cli\u003e200 x 4 @ 4 ohms RMS\u003c\/li\u003e\n\u003cli\u003eHi-fidelity Class A\/B design\u003c\/li\u003e\n\u003cli\u003eVariable 12dB low \u0026amp; high pass filters: 40Hz-5kHz\u003c\/li\u003e\n\u003cli\u003ePower and protection indicators included\u003c\/li\u003e\n\u003cli\u003eThermal, voltage, speaker short, and dc-offset protection circuitry\u003c\/li\u003e\n\u003cli\u003eOptional wired remote control with clipping indicator \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003eThe SAEv4 is engineered with high-fidelity Class A\/B multi-channel architecture, providing an ideal balance between performance and affordability. Leveraging the latest half-bridge technology, these amplifiers deliver clean, powerful audio signals in a compact form factor.Featuring an all-new chassis and heatsink design with 33% more aluminum, this SAEv4 keeps your system cool even during intense listening sessions. The amp is packed with a variable subsonic, high pass and low pass filters, plus a 4-way protection circuit (thermal, voltage, speaker short, and DC offset). The variable crossover slope (LPF\/HPF) and a high signal-to-noise ratio of 92dB further enhance audio quality, with an exceptionally low noise floor.\u003cbr\u003eWhether you create a powerful three-channel system, a dual mono monster, or a four channel system full of fidelity, this amp is ready, willing, and more than able to drive your car audio system with a new level of precision and clarity. \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":46890123985206,"sku":"A-SAEV42004","price":539.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/SAEv4-2004-000.png?v=1707164657"},{"product_id":"horizon-hz-80-4-4-channel-amplifier","title":"Horizon HZ-80.4 4-Channel Amplifier","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eSundown Audio HZ-80.4 | \u003cspan data-markjs=\"true\" class=\"outlook-search-highlight\"\u003eHorizon\u003c\/span\u003e Series 4-Channel Full-Range Amplifier (80W x4)\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eVersatility Meets Clarity.\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003eThe HZ-80.4 is your go-to solution for adding clean, controlled power across your mids and highs. With 80 watts RMS x 4 channels at 4 ohms, it’s the perfect amp for speaker upgrades, active component setups, or small subwoofers that need headroom without the distortion. This amp runs cool and clean — and with its compact chassis, it fits just about anywhere.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003eThe \u003cspan data-markjs=\"true\" class=\"outlook-search-highlight\"\u003eHorizon\u003c\/span\u003e Series amps don’t cut corners. This model includes adjustable high and low pass filters on all four channels, a full-range passthrough option, and high-level input capability to simplify factory integration. Run it passive or active — bridge it for bigger loads — the HZ-80.4 gives you maximum control and Sundown-grade output from a surprisingly small form factor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003eWhether you’re upgrading a factory system or building something fresh, the HZ-80.4 gives your sound system the foundation it needs to shine. Clean mids, crisp highs, tight control.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eSpecs:\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eRMS Power @ 14.4V\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003cbr\u003e• 4 Ohm: 80W x4\u003cbr\u003e• 2 Ohm: 130W x4\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eHigh Pass Filter (CH1-4):\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 27Hz – 250Hz\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eLow Pass Filter (CH1-4):\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 27Hz – 250Hz\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eInput Sensitivity:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e Up to 6V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eSignal-to-Noise Ratio:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 95dB\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eFuse Rating:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 50A\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 7.4\" x 4.63\" x 2.2\"\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eWeight:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 2.54 lbs (1.15 kg)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":52407711433014,"sku":"A-HZ804","price":259.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/HZ804C-cover.png?v=1752764737"},{"product_id":"horizon-hz-100-4-4-channel-amplifier","title":"Horizon HZ-100.4 4-Channel Amplifier","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eSundown Audio HZ-100.4 | \u003cspan data-markjs=\"true\" class=\"outlook-search-highlight\"\u003eHorizon\u003c\/span\u003e Series 4-Channel Full-Range Amplifier (100W x4)\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eMore Power. More Control. Better Sound.\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003cbr\u003eStep up your system with the HZ-100.4, Sundown’s high-output 4-channel amplifier that delivers 100 watts RMS per channel at 4 ohms — or 170W x4 at 2 ohms. Whether you’re powering component speakers, pro audio drivers, or full-range coaxials, the HZ-100.4 gives you headroom to push your gear harder, with less strain and more sonic clarity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003eThis amplifier was made for audio lovers who want control. With fully adjustable HPF and LPF crossovers, you can run active or passive setups, bridge channels, or mix configurations. It’s built with high-level inputs, DC Sense, and 4-way protection, making it just as at home in factory integration as it is in custom builds.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003eIf you're ready to take your highs and mids from average to outstanding, the HZ-100.4 gives you the tools and the power to make it happen — all in one clean, efficient package.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eSpecs:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eRMS Power @ 14.4V\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003cbr\u003e• 4 Ohm: 100W x4\u003cbr\u003e• 2 Ohm: 170W x4\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eHigh Pass Filter (CH1-4):\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 27Hz – 250Hz\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eLow Pass Filter (CH1-4):\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 27Hz – 250Hz\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eInput Sensitivity:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e Up to 6V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eSignal-to-Noise Ratio:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 95dB\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eFuse Rating:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 60A\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 8.63\" x 4.63\" x 2.2\"\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eWeight:\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e 2.93 lbs (1.33 kg)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":52407728996662,"sku":"A-HZ1004","price":289.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/HZ1004A-cover.png?v=1752764756"},{"product_id":"stereo-integrity-siq-200-4-high-fidelity-4-channel-amplifier-200w-rms-x4-4ω-class-a-b-audiophile-design-full-bandwidth-5hz-150khz-zero-filters-crossovers-eq-amplifier","title":"Stereo Integrity SIQ 200.4 High-Fidelity 4-Channel Amplifier","description":"\u003ch3\u003e\u003cstrong\u003eStereo Integrity SIQ 200.4 Amplifier: Purity and Power in Two Channels\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eStereo Integrity SIQ 200.4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebrings true high-fidelity audio engineering back to mobile sound systems. Built by audiophiles for the most discerning listeners, this powerful 2-Channel Class A\/B amplifier prioritizes signal integrity above all else. Its design features\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ezero filters, zero crossovers, and zero EQ\u003c\/strong\u003e, delivering a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efull bandwidth\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esignal (5 Hz to 150,000 Hz) that is clean, precise, and uncompromised. This is the foundation for an accurate soundstage and breathtaking sonic detail.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eUncompromised Audiophile Construction\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEvery component in the SIQ 200.4 was selected based on its acoustic performance and long-term durability:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Transistors:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtilizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eaudiophile-grade TO-3 output transistors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor clean, linear power delivery.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Circuitry:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures high-quality\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eUPC4570 op-amps\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIRFPO64N power supply transistors\u003c\/strong\u003e, and sand cast resistors throughout the construction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAesthetics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProtected by a thick extruded aluminum chassis with a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ecopper anodized shielded transformer cover\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto minimize electromagnetic interference, all visible through a large\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eplexiglass viewing window\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHigh Power, Ultra-Low Distortion Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe SIQ 200.4 delivers robust power with unmatched fidelity, validated by\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAudio Precision measurements\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRated RMS Power Output (2 Channels):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e200W RMS x2 @ 4Ω\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Current Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e400W RMS x2 @ 2Ω\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBridged Monoblock Power:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e800W RMS x1 @ 4Ω\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Harmonic Distortion (THD):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e0.03 %\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(Exceptional clarity)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSignal-to-Noise Ratio (SNR):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e92 dB\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation and Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePurity Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ediscrete gain knob per channel\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor precise level matching.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConnections:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePremium\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTiffany-style RCA connections\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eaccepting inputs up to 16 Volts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCompact size at\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e14 x 8 x 2 Inches\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMaximum current draw of 85.6 amps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe SIQ 200.4 is the ultimate 2-channel solution for audiophiles seeking true, powerful sound reproduction in their vehicle.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eAmplifiers Specifications\u003cbr\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ctable style=\"width: 100.24%; height: 113.916px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 51.2126%; height: 19.5833px;\" class=\"top-aligned\"\u003eFrequency Response Minimum\u003c\/td\u003e\n\u003ctd style=\"width: 48.6701%; height: 19.5833px;\" class=\"top-aligned\"\u003e5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.5833px;\"\u003e\n\u003ctd style=\"width: 51.2126%; height: 35.5833px;\"\u003e\u003cspan\u003eFrequency Response Maximum\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 48.6701%; height: 35.5833px;\" class=\"top-aligned\"\u003e\n\u003cp\u003e\u003cspan\u003e150,000 Hz\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 51.2126%; height: 19.5833px;\"\u003e\u003cspan\u003eSignal-to-Noise Ratio (SNR)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 48.6701%; height: 19.5833px;\" class=\"top-aligned\"\u003e92 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 51.2126%; height: 19.5833px;\"\u003e\u003cspan\u003eTotal Harmonic Distortion (THD)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 48.6701%; height: 19.5833px;\" class=\"top-aligned\"\u003e0.03 %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 51.2126%; height: 19.5833px;\"\u003e\u003cspan\u003eDimensions (W x H x D)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 48.6701%;\"\u003e27.25 x 8 x 2 Inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 51.2126%;\"\u003e\u003cspan\u003eRated RMS power output into all 4 channels at 4 ohm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 48.6701%;\"\u003e\u003cspan\u003e200 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 51.2126%;\"\u003e\u003cspan\u003eRated RMS power output into all 4 channels at 2 ohm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 48.6701%;\"\u003e\u003cspan\u003e425 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 51.2126%;\" class=\"top-aligned\"\u003eBridged RMS power into 2 channels at 4 ohm\u003c\/td\u003e\n\u003ctd style=\"width: 48.6701%;\" class=\"top-aligned\"\u003e\u003cspan\u003e875 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\n\u003cbr\u003e\u003cbr\u003ePower\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ctable style=\"width: 100.06%; height: 39.1666px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 49.6683%; height: 19.5833px;\" class=\"top-aligned\"\u003eIdle Current Draw\u003c\/td\u003e\n\u003ctd style=\"width: 50.0322%;\" class=\"top-aligned\"\u003e2.6 amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 49.6683%; height: 19.5833px;\" class=\"top-aligned\"\u003eMaximum Current Draw\u003c\/td\u003e\n\u003ctd style=\"width: 50.0322%; height: 19.5833px;\" class=\"top-aligned\"\u003e\n\u003cdiv data-block-name=\"woocommerce\/product-details\" class=\"wp-block-woocommerce-product-details alignwide\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"woocommerce-tabs wc-tabs-wrapper\"\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--custom_specifications panel entry-content wc-tab\" id=\"tab-custom_specifications\" role=\"tabpanel\" aria-labelledby=\"tab-title-custom_specifications\"\u003e\n\u003cdiv id=\"spec_tables_container\"\u003e\n\u003cdiv class=\"spec_table_container\"\u003e\n\u003cdiv class=\"spec_category_wrapper\"\u003e\n\u003cdiv class=\"spec_category\"\u003e\n\u003ctable class=\"woocommerce-product-attributes shop_attributes\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"top-aligned\"\u003e176 amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"up-sells upsells products\"\u003e\u003c\/section\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003eConnections\u003c\/h2\u003e\n\u003ctable style=\"width: 100.06%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 70.9548%;\" class=\"top-aligned\"\u003eRCA Input Maximum\u003c\/td\u003e\n\u003ctd style=\"width: 28.7458%;\" class=\"top-aligned\"\u003e16 Volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":53097849094454,"sku":null,"price":679.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/200.4_1_-removebg-preview.png?v=1760461737"},{"product_id":"stereo-integrity-siq-75-4-high-fidelity-4-channel-amplifier-75w-rms-x4-4ω-class-a-b-audiophile-design-full-bandwidth-5hz-150khz-zero-crossovers-eq-amplifier","title":"Stereo Integrity SIQ 75.4 High-Fidelity 4-Channel Amplifier","description":"\u003ch3\u003e\u003cstrong\u003eStereo Integrity SIQ 75.4 Amplifier: Purity at its Finest for Your Soundstage\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"animating\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003eStereo Integrity SIQ 75.4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esignals the return of true high-fidelity audio engineering to the mobile sound space. Built by audiophiles for the most discerning listeners, this 4-Channel Class A\/B amplifier prioritizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esignal integrity\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eabove all else. Its core design features\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ezero filters, zero crossovers, and zero EQ\u003c\/strong\u003e, delivering a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efull bandwidth\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esignal (5 Hz to 150,000 Hz) that is clean, precise, and uncompromised. This is the foundation for an accurate soundstage and breathtaking sonic detail.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eUncompromised Audiophile Construction\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEvery component in the SIQ 75.4 was selected for its acoustic performance and durability:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Transistors:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtilizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eaudiophile-grade TO-3 output transistors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor clean, linear power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Circuitry:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures high-quality\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eUPC4570 op-amps\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIRFPO64N power supply transistors\u003c\/strong\u003e, and sand cast resistors throughout.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConnections:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEquipped with premium\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTiffany-style RCA connections\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eaccepting inputs up to 16 Volts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eChassis:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProtected by a thick extruded aluminum chassis with a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ecopper anodized shielded transformer cover\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto minimize electromagnetic interference, all visible through a large\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eplexiglass viewing window\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eClean Power, Ultra-Low Distortion Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe SIQ 75.4 delivers precise power with unmatched fidelity, validated by\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAudio Precision measurements\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRated RMS Power Output (4 Channels):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e75W RMS x4 @ 4Ω\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Current Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e120W RMS x4 @ 2Ω\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBridged Power:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e120W RMS x2 @ 4Ω\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Harmonic Distortion (THD):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAn ultra-low\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e0.03 %\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSignal-to-Noise Ratio (SNR):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e90 dB\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation and Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePurity Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ediscrete gain knob per channel\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor precise level matching.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCompact size at\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e14 x 8 x 2 Inches\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMaximum current draw of 66 amps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe SIQ 75.4 is the ideal solution for audiophiles seeking true sound reproduction for their front and rear stage speakers.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eAmplifiers Specifications\u003cbr\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ctable width=\"100%\" style=\"width: 100.24%; height: 231.417px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 49.7597%; height: 19.5833px;\"\u003eFrequency Response Minimum\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%; height: 19.5833px;\"\u003e5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.5833px;\"\u003e\n\u003ctd style=\"width: 49.7597%; height: 35.5833px;\"\u003e\u003cspan\u003eFrequency Response Maximum\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%; height: 35.5833px;\"\u003e\n\u003cp\u003e\u003cspan\u003e150,000 Hz\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 49.7597%; height: 19.5833px;\"\u003e\u003cspan\u003eSignal-to-Noise Ratio (SNR)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%; height: 19.5833px;\"\u003e90 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 49.7597%; height: 19.5833px;\"\u003e\u003cspan\u003eTotal Harmonic Distortion (THD)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%; height: 19.5833px;\"\u003e0.03 %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 49.7597%; height: 19.5833px;\"\u003e\u003cspan\u003eDimensions (W x H x D)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%; height: 19.5833px;\"\u003e14 x 8 x 2 Inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1667px;\"\u003e\n\u003ctd style=\"width: 49.7597%; height: 39.1667px;\"\u003e\u003cspan\u003eRated RMS power output into all 4 channels at 4 ohm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%; height: 39.1667px;\"\u003e75 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1667px;\"\u003e\n\u003ctd style=\"width: 49.7597%; height: 39.1667px;\"\u003e\u003cspan\u003eRated RMS power output into all 4 channels at 2 ohm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%;\"\u003e120 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1667px;\"\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 49.7597%; height: 39.1667px;\"\u003eBridged RMS power into 2 channels at 4 ohm\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%;\"\u003e120 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.7597%;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.123%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\n\u003cbr\u003e\u003cbr\u003ePower\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ctable width=\"100%\" style=\"width: 100.06%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 49.6683%;\"\u003eIdle Current Draw\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.0322%;\"\u003e1.2 amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 49.6683%;\"\u003eMaximum Current Draw\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 50.0322%;\"\u003e\u003cspan\u003e66 amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003eConnections\u003c\/h2\u003e\n\u003ctable width=\"100%\" style=\"width: 100.06%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 70.9548%;\"\u003eRCA Input Maximum\u003c\/td\u003e\n\u003ctd class=\"top-aligned\" style=\"width: 28.7458%;\"\u003e16 Volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sundown Audio","offers":[{"title":"Default Title","offer_id":53097881108790,"sku":null,"price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6669\/9062\/files\/75.4-removebg-preview_26688de2-c88e-4499-b057-614941bbbcfb.png?v=1760461998"}],"url":"https:\/\/sundownaudio.com\/collections\/4-channel-amplifiers.oembed","provider":"Sundown Audio","version":"1.0","type":"link"}