{"product_id":"helix-amplify-204-x-over-4-channel-class-d-amplifier-380w-bridged","title":"Helix Amplify 204 X-Over 4-Channel Class D Amplifier 380W Bridged","description":"\u003ch2 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003e\u003cstrong\u003eHelix Amplify 204 X-Over 4-Channel Fully Bridgeable Class D Amplifier with Active Crossover\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eA 4-channel fully bridgeable Class D amplifier from the Helix Amplify 2-Series, the Amplify 204 X-Over delivers 4 x 100W RMS at 4Ω, 4 x 190W RMS at 2Ω, and 2 x 380W RMS bridged at 4Ω (up to 240W per channel maximum at 2Ω), with 4 RCA inputs, 4 high-level ADEP.3 inputs (2-16V), adjustable active highpass and lowpass filters (45-400Hz, 12dB\/Oct, switchable), DirectDSP function, auto turn-on via music signal, 99dB SNR at full power, THD below 0.012% at 1kHz, Start-Stop capability, and a removable top cover in an ultra-compact 40 x 248 x 114mm housing.\u003c\/p\u003e\n\u003ch3 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe Helix Amplify 204 X-Over is the active crossover variant of the Amplify 204 4-channel amplifier, designed as the versatile solution for full-range applications in conventional sound upgrades using factory or aftermarket head units. The fully bridgeable 4-channel architecture delivers maximum installation flexibility: operate as a classic 4-channel system for front and rear speakers, a 3-channel configuration with bridged subwoofer output, or a bridged 2-channel layout for maximum power to a stereo speaker pair or passive subwoofer.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe advanced Class D amplifier stage delivers 4 x 100W RMS at 4Ω and 4 x 190W RMS at 2Ω in 4-channel mode, with maximum output of up to 240W per channel at 2Ω. In bridged mode, two channel pairs each deliver 380W RMS at 4Ω. SNR is 99dB (A-weighted) at full power, THD at 1kHz into 4Ω is below 0.012%, and THD+N below 0.02%.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe integrated active crossover provides independently adjustable highpass and lowpass filters from 45Hz to 400Hz at 12dB\/Oct, both switchable off for full-range operation. The Input Mode switch selects the appropriate input configuration for the system. The DirectDSP function bypasses the internal crossover entirely and routes the input signal unfiltered directly to the output stage, enabling the amplifier to transition from a standalone crossover unit to a clean amplification stage when an external DSP is added to the system later. The 4 high-level ADEP.3 inputs (2-16V, 9-33Ω) and ADEP.3 circuit ensure error-free integration with OEM factory head units. Auto turn-on activates the amplifier from the music signal without a remote wire. Switchable 4 RCA inputs (1-8V) and 4 high-level inputs cover all factory and aftermarket integration scenarios. Operating voltage is 10.5-16V with Start-Stop capability to 6V. Fused at 2 x 30A LP-Mini (APS).\u003c\/p\u003e\n\u003ch3 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eFeatures \u0026amp; Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003e4 x 100W RMS at 4Ω \/ 2 x 380W RMS Bridged - Flexible Multi-Configuration Output:\u003c\/strong\u003e Delivers 4 x 100W RMS at 4Ω, 4 x 190W RMS at 2Ω, or 2 x 380W RMS bridged at 4Ω, providing maximum flexibility to configure the amplifier as a 4-channel full-range system, 3-channel system with bridged subwoofer, or 2-channel bridged high-power layout.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eActive Adjustable Highpass and Lowpass Filters - 45-400Hz at 12dB\/Oct (Switchable):\u003c\/strong\u003e Independent adjustable highpass and lowpass filters from 45Hz to 400Hz at 12dB\/Oct provide onboard active crossover control for active front system configurations (separate tweeter and woofer channels) and high\/low frequency separation for multi-way setups. Both filters can be switched off individually for full-range operation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eDirectDSP Function - Crossover Bypass for Future DSP Upgrade Path:\u003c\/strong\u003e The DirectDSP function bypasses the integrated active crossover entirely and routes the input signal unfiltered directly to the output stage, enabling the amplifier to operate as a clean amplification stage when an external DSP processor is added. This future-proofs the installation without requiring rewiring or hardware changes when upgrading to a DSP-based system.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003e4 High-Level ADEP.3 Inputs with Auto Turn-On - Up to 16V:\u003c\/strong\u003e The 4 high-level ADEP.3 inputs (2-16V) connect directly to factory OEM head unit speaker outputs with the ADEP.3 circuit preventing error messages and feature loss. Auto turn-on activates the amplifier from the music signal without requiring a separate remote wire, maximising OEM integration compatibility.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003e4 RCA Inputs for Aftermarket Head Units:\u003c\/strong\u003e Four RCA inputs (1-8V, 8kΩ) accept line-level signals from aftermarket head units, DSP processors, and external signal sources, providing full system flexibility alongside the high-level inputs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eFully Bridgeable Multi-Channel Architecture:\u003c\/strong\u003e All 4 output channels are fully bridgeable in any combination, enabling 4-channel, 3-channel, and 2-channel bridged configurations to accommodate a wide range of vehicles and system requirements from a single amplifier unit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eInput Mode Switch for System Configuration:\u003c\/strong\u003e The Input Mode switch selects the appropriate signal routing and input configuration for the specific system setup, simplifying the implementation of various 2-way active, passive, and combined front-subwoofer configurations.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003e99dB SNR at Full Power - THD Below 0.012% at 1kHz:\u003c\/strong\u003e The Amplify 204 X-Over delivers 99dB SNR at full power and THD at 1kHz below 0.012%, providing audio performance that exceeds conventional 4-channel amplifier standards.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eAdvanced Class D - High Efficiency and Low Heat Dissipation:\u003c\/strong\u003e The advanced Class D concept delivers high efficiency and very low heat dissipation, enabling 4 x 190W RMS at 2Ω from an ultra-compact 40 x 248 x 114mm housing.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eRemovable Top Cover - Clean Appearance and Control Protection:\u003c\/strong\u003e The removable top cover conceals all connections, crossover controls, and input mode switches when installed, providing a clean streamlined appearance and additional protection.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eStart-Stop Capable - 10.5-16V Operating Range:\u003c\/strong\u003e Start-Stop capable power supply maintains stable operation during voltage drops to 6V for up to 5 seconds.\u003c\/p\u003e\n\u003ch3 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul dir=\"auto\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHelix Amplify 204 X-Over Amplifier\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2 x Allen Key\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e3 x Connection Cables\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2 x Fuse\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMounting Material\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInstruction Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eTechnical Specs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cdiv dir=\"auto\" class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSKU\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAMPLIFY 204 X-OVER\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBrand\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eHelix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRange\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAmplify 2-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eVariant\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eX-Over (Active Crossover)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChannels\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 (Fully Bridgeable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAmplifier Class\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBuilt-in DSP\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower RMS - 4Ch at 4Ω (14.4V)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 x 100W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower RMS - 4Ch at 2Ω (14.4V)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 x 190W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower RMS - Bridged 2Ch at 4Ω\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2 x 380W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Output per Channel at 2Ω\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eUp to 240W RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTHD at 1kHz, 1W into 4Ω\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLess than 0.012%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTHD+N at 1kHz, 1W into 4Ω\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLess than 0.02%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSNR at Full Power\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e99dB (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDamping Factor\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRCA Inputs\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 x RCA (1-8V, 8kΩ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eHigh-Level Inputs\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 x High-Level ADEP.3 (2-16V, 9-33Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOutputs\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4 x Speaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRCA Preout\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10Hz-20,000Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eHighpass Filter\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45-400Hz Adjustable, 12dB\/Oct (Switchable Off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLowpass Filter\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45-400Hz Adjustable, 12dB\/Oct (Switchable Off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDirectDSP Function\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes (Crossover Bypass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInput Mode Switch\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eADEP.3\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAuto Turn-On\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes (via Music Signal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eClipping LED\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10.5-16V (Stable to 6V for 5 Seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower Rating\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDC 12V, 70A Max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eIdle Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e1100mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFuse\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2 x 30A LP-Mini (APS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e-40°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStart-Stop Capable\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTop Cover\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRemovable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDimensions\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e40mm x 248mm x 114mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe Amplify 204 X-Over is compatible with 10.5-16V vehicle electrical systems. RCA inputs accept 1-8V from aftermarket head units and DSP processors. High-level ADEP.3 inputs accept 2-16V from factory OEM head units with auto turn-on. The Amplify 204 X-Over has no RCA preout. The DirectDSP function enables future DSP upgrade integration without rewiring. Confirm channel bridging configuration and minimum speaker impedance (4Ω for bridged) before purchase.\u003c\/p\u003e\n\u003ch3 dir=\"auto\" class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eWhat is the DirectDSP function on the Amplify 204 X-Over?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe DirectDSP function bypasses the integrated active crossover entirely and routes the input signal unfiltered directly to the output stage of the amplifier. This allows the Amplify 204 X-Over to be used initially as a standalone amplifier with integrated crossover, and later transitioned to a clean amplification stage when an external DSP processor is added to the system - without requiring any rewiring or hardware changes.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eWhat configurations can the Amplify 204 X-Over be used in?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe fully bridgeable 4-channel architecture supports: classic 4-channel operation for front and rear speaker channels (4 x 100W at 4Ω), a 3-channel configuration with two front channels plus one bridged rear channel for a subwoofer (2 x 100W + 1 x 380W), or 2-channel bridged operation for maximum power to a stereo speaker pair or passive subwoofer (2 x 380W at 4Ω).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eCan the highpass and lowpass filters on the Amplify 204 X-Over be switched off?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eYes. Both the highpass and lowpass filters can be individually switched off for full-range operation on any channel, providing maximum flexibility for passive speaker configurations that do not require active crossover filtering.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eDoes the Amplify 204 X-Over work with factory head units without a remote wire?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eYes. The auto turn-on function activates the amplifier from the music signal via the high-level ADEP.3 inputs, eliminating the need for a separate remote wire and maximising compatibility with factory OEM head units.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eWhat is the difference between the Amplify 204 X-Over and the Amplify 204 Direct?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe Amplify 204 X-Over includes an integrated active crossover with adjustable highpass and lowpass filters, ADEP.3 high-level inputs with auto turn-on, and the DirectDSP bypass function for future DSP upgrades. It is designed for conventional sound upgrades with factory or aftermarket head units. The Amplify 204 Direct is designed exclusively as a clean amplification stage for DSP-based systems, with DirectDSP inputs and no onboard filtering.\u003c\/p\u003e","brand":"HELIX","offers":[{"title":"Default Title","offer_id":44752694411357,"sku":"AMPLIFY204XOVER","price":595.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/9528\/9437\/files\/AMPLIFY204X-OVER-3.webp?v=1784606886","url":"https:\/\/frankiesautoelectrics.com.au\/products\/helix-amplify-204-x-over-4-channel-class-d-amplifier-380w-bridged","provider":"Frankies Auto Electrics","version":"1.0","type":"link"}