{"product_id":"hx400-2-hex-2-channel-full-range-class-d-amplifier","title":"Diamond Audio 2-Channel HEX Series Full Range Class D Amplifier - HX400.2","description":"\u003ch2\u003eDiamond Audio 2-Channel HEX Series Full Range Class D Amplifier - HX400.2\u003c\/h2\u003e\n\u003cp data-end=\"504\" data-start=\"77\"\u003eExperience precision-engineered performance with the \u003cstrong data-end=\"205\" data-start=\"130\"\u003eDiamond Audio HX400.2 HEX Series 2-Channel Full Range Class D Amplifier\u003c\/strong\u003e, designed for audiophiles who demand \u003cstrong data-end=\"304\" data-start=\"243\"\u003eclean power, dynamic response, and superior sound clarity\u003c\/strong\u003e. Built with premium components and advanced engineering, this \u003cstrong data-end=\"400\" data-start=\"367\"\u003e2-channel car audio amplifier\u003c\/strong\u003e delivers high-end performance for \u003cstrong data-end=\"503\" data-start=\"435\"\u003ecomponent speakers, coaxial speakers, and subwoofer applications\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"907\" data-start=\"506\"\u003ePowered by \u003cstrong data-end=\"560\" data-start=\"517\"\u003efull-range Class D amplifier technology\u003c\/strong\u003e, the \u003cstrong data-end=\"601\" data-start=\"566\"\u003eDiamond Audio HX400.2 amplifier\u003c\/strong\u003e provides outstanding efficiency while minimizing heat and maximizing output. With \u003cstrong data-end=\"758\" data-start=\"684\"\u003e200W x 2 at 4 ohms, 350W x 2 at 2 ohms, and 700W x 1 bridged at 4 ohms\u003c\/strong\u003e, this \u003cstrong data-end=\"799\" data-start=\"765\"\u003ehigh power 2-channel amplifier\u003c\/strong\u003e offers the flexibility to power full-range speakers or bridge channels for increased subwoofer performance.\u003c\/p\u003e\n\u003cp data-end=\"1279\" data-start=\"909\"\u003eEngineered for accuracy, the \u003cstrong data-end=\"970\" data-start=\"938\"\u003eHX400.2 HEX Series amplifier\u003c\/strong\u003e features a \u003cstrong data-end=\"1037\" data-start=\"982\"\u003e4-layer PCB board with balanced differential inputs\u003c\/strong\u003e, ensuring \u003cstrong data-end=\"1112\" data-start=\"1048\"\u003enoise-free signal transmission and exceptional audio clarity\u003c\/strong\u003e. Audiophile-grade components, including \u003cstrong data-end=\"1201\" data-start=\"1153\"\u003ehigh-tolerance circuitry and SNAP capacitors\u003c\/strong\u003e, contribute to precise sound reproduction and reliable long-term performance.\u003c\/p\u003e\n\u003cp data-end=\"1636\" data-start=\"1281\"\u003eThe \u003cstrong data-end=\"1328\" data-start=\"1285\"\u003eDiamond Audio HX400.2 Class D amplifier\u003c\/strong\u003e includes \u003cstrong data-end=\"1403\" data-start=\"1338\"\u003efully variable high-pass and low-pass crossovers (40Hz–400Hz)\u003c\/strong\u003e with a \u003cstrong data-end=\"1436\" data-start=\"1411\"\u003e24dB per octave slope\u003c\/strong\u003e, allowing precise tuning for optimal system performance. Additional features such as \u003cstrong data-end=\"1548\" data-start=\"1522\"\u003eoutput clip indicators\u003c\/strong\u003e, \u003cstrong data-end=\"1567\" data-start=\"1550\"\u003ephase control\u003c\/strong\u003e, and \u003cstrong data-end=\"1597\" data-start=\"1573\"\u003etop-mounted controls\u003c\/strong\u003e make system setup simple and accurate.\u003c\/p\u003e\n\u003cp data-end=\"1902\" data-start=\"1638\"\u003eBuilt with a \u003cstrong data-end=\"1699\" data-start=\"1651\"\u003edurable anodized extruded aluminum heat sink\u003c\/strong\u003e, this \u003cstrong data-end=\"1727\" data-start=\"1706\"\u003ecompact amplifier\u003c\/strong\u003e offers superior thermal management while maintaining a sleek and modern design. The fully concealed mounting and illuminated logo add a premium aesthetic to any installation.\u003c\/p\u003e\n\u003cp data-end=\"1902\" data-start=\"1638\"\u003eThe \u003cstrong data-end=\"2397\" data-start=\"2351\"\u003eDiamond Audio HX400.2 HEX Series Amplifier\u003c\/strong\u003e delivers refined, powerful, and distortion-free sound, making it the perfect choice for \u003cstrong data-end=\"2550\" data-start=\"2486\"\u003ehigh-end car audio systems seeking precision and performance\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch5 data-end=\"1920\" data-start=\"1904\" data-section-id=\"1iz91iu\"\u003eFeatures\u003c\/h5\u003e\n\u003cp data-end=\"2345\" data-start=\"1922\"\u003e• \u003cstrong data-end=\"1966\" data-start=\"1924\"\u003e2-channel full range Class D amplifier\u003c\/strong\u003e\u003cbr data-end=\"1969\" data-start=\"1966\"\u003e• \u003cstrong data-end=\"2023\" data-start=\"1971\"\u003e200W x 2 @ 4Ω \/ 350W x 2 @ 2Ω \/ 700W x 1 bridged\u003c\/strong\u003e\u003cbr data-end=\"2026\" data-start=\"2023\"\u003e• \u003cstrong data-end=\"2085\" data-start=\"2028\"\u003eAudiophile-grade components and high-tolerance design\u003c\/strong\u003e\u003cbr data-end=\"2088\" data-start=\"2085\"\u003e• \u003cstrong data-end=\"2139\" data-start=\"2090\"\u003e4-layer PCB with balanced differential inputs\u003c\/strong\u003e\u003cbr data-end=\"2142\" data-start=\"2139\"\u003e• \u003cstrong data-end=\"2190\" data-start=\"2144\"\u003eVariable HPF \/ LPF crossovers (24dB slope)\u003c\/strong\u003e\u003cbr data-end=\"2193\" data-start=\"2190\"\u003e• \u003cstrong data-end=\"2239\" data-start=\"2195\"\u003eOutput clip indicators and phase control\u003c\/strong\u003e\u003cbr data-end=\"2242\" data-start=\"2239\"\u003e• \u003cstrong data-end=\"2298\" data-start=\"2244\"\u003eAnodized aluminum heat sink for cooling efficiency\u003c\/strong\u003e\u003cbr data-end=\"2301\" data-start=\"2298\"\u003e• \u003cstrong data-end=\"2345\" data-start=\"2303\"\u003eCompact design with premium aesthetics\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch5 data-start=\"1309\" data-end=\"1524\"\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:57a20e7f-f1ef-4da9-9d5c-4d5ec57a6c7b-23\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:57a20e7f-f1ef-4da9-9d5c-4d5ec57a6c7b-23\" data-turn-id-container=\"request-WEB:57a20e7f-f1ef-4da9-9d5c-4d5ec57a6c7b-23\" data-testid=\"conversation-turn-48\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"98818ac6-367d-4969-9b81-7236c4891734\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"28\" data-end=\"1232\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1searle\" data-start=\"28\" data-end=\"245\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"67\"\u003eHigh-performance full-range power\u003c\/strong\u003e – The \u003cstrong data-start=\"74\" data-end=\"106\" data-is-only-node=\"\"\u003eHX400.2 HEX Series amplifier\u003c\/strong\u003e delivers clean, efficient Class D power for speakers, components, or bridged subwoofer applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"7ftj8o\" data-start=\"246\" data-end=\"432\"\u003e\n\u003cstrong data-start=\"248\" data-end=\"285\"\u003eStrong output in a compact design\u003c\/strong\u003e – Provides \u003cstrong data-start=\"297\" data-end=\"314\" data-is-only-node=\"\"\u003e200W x 2 @ 4Ω\u003c\/strong\u003e, \u003cstrong data-start=\"316\" data-end=\"333\"\u003e350W x 2 @ 2Ω\u003c\/strong\u003e, and up to \u003cstrong data-start=\"345\" data-end=\"366\"\u003e700W bridged @ 4Ω\u003c\/strong\u003e for flexible system builds. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"l9v9n9\" data-start=\"433\" data-end=\"640\"\u003e\n\u003cstrong data-start=\"435\" data-end=\"460\"\u003ePremium sound quality\u003c\/strong\u003e – Built with audiophile-grade components, a \u003cstrong data-start=\"505\" data-end=\"520\" data-is-only-node=\"\"\u003e4-layer PCB\u003c\/strong\u003e, and balanced differential inputs for lower noise and clearer audio reproduction. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"202oc4\" data-start=\"641\" data-end=\"827\"\u003e\n\u003cstrong data-start=\"643\" data-end=\"665\"\u003eEasy system tuning\u003c\/strong\u003e – Adjustable high-pass and low-pass crossovers, phase control, and clip indicators help optimize performance for any setup. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1l863dm\" data-start=\"828\" data-end=\"1024\"\u003e\n\u003cstrong data-start=\"830\" data-end=\"862\"\u003eEfficient Class D technology\u003c\/strong\u003e – Delivers powerful output with improved heat management, making it ideal for daily driving and custom audio installations. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1x5l9jm\" data-start=\"1025\" data-end=\"1232\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1027\" data-end=\"1057\"\u003eExpert choice for upgrades\u003c\/strong\u003e – A versatile 2-channel amplifier built for enthusiasts who want reliable power, clean sound, and a professional-grade audio experience. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5 data-start=\"1309\" data-end=\"1524\"\u003e   \u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: What is the Diamond Audio HX400.2 designed for?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA: It is a 2-channel full-range Class D amplifier designed to power speakers with clean, efficient audio performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: What are the benefits of Class D technology?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA: Class D amplification provides high efficiency, lower heat output, and strong power delivery in a compact design.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: Can the HX400.2 power multiple speakers?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. Its 2-channel design is ideal for powering front or rear speakers in car, motorcycle, and powersports audio systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: Does it have adjustable tuning controls?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. It includes adjustable gain and crossover controls to help optimize sound quality for your system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: Is the HX400.2 good for audio upgrades?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. Its compact size and reliable full-range output make it a great choice for factory audio upgrades and custom installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 data-start=\"1309\" data-end=\"1524\"\u003e   \u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:3cd937b8-2b7e-4b8b-a5e0-e5c39fc005be-21\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:3cd937b8-2b7e-4b8b-a5e0-e5c39fc005be-21\" data-turn-id-container=\"request-WEB:3cd937b8-2b7e-4b8b-a5e0-e5c39fc005be-21\" data-testid=\"conversation-turn-44\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"f8c042bb-6902-4962-9272-56c4423d5343\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"22\" data-end=\"681\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"7c8xr6\" data-start=\"22\" data-end=\"104\"\u003eClean the amplifier with a soft, dry microfiber cloth to remove dust and debris.\u003c\/li\u003e\n\u003cli data-section-id=\"1k92ppj\" data-start=\"105\" data-end=\"181\"\u003eKeep cooling fins and ventilation areas clear for proper heat dissipation.\u003c\/li\u003e\n\u003cli data-section-id=\"r4ds8f\" data-start=\"182\" data-end=\"281\"\u003eInspect power, ground, RCA, and speaker connections regularly for tight, corrosion-free contacts.\u003c\/li\u003e\n\u003cli data-section-id=\"3nwfkg\" data-start=\"282\" data-end=\"360\"\u003eEnsure the amplifier is securely mounted to reduce vibration-related damage.\u003c\/li\u003e\n\u003cli data-section-id=\"k9i6rp\" data-start=\"361\" data-end=\"456\"\u003eSet gain and crossover controls correctly to prevent clipping and protect connected speakers.\u003c\/li\u003e\n\u003cli data-section-id=\"1eorcs4\" data-start=\"457\" data-end=\"532\"\u003eAvoid prolonged operation at maximum output to extend amplifier lifespan.\u003c\/li\u003e\n\u003cli data-section-id=\"13si7m7\" data-start=\"533\" data-end=\"608\"\u003eCheck fuse holders and wiring periodically for wear or overheating signs.\u003c\/li\u003e\n\u003cli data-section-id=\"u9s6jl\" data-start=\"609\" data-end=\"681\" data-is-last-node=\"\"\u003eKeep the amplifier dry and protected from excessive heat and moisture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Diamond Audio","offers":[{"title":"Default Title","offer_id":45780075643071,"sku":"HX400.2","price":397.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/hx400.2-1.jpg?v=1782539753","url":"https:\/\/www.mybackyardzone.com\/products\/hx400-2-hex-2-channel-full-range-class-d-amplifier","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}