{"product_id":"pioneer-gm-dx874-4-channel-class-d-car-amplifier","title":"Pioneer GM-DX874 4-Channel Class-D Car Amplifier","description":"\u003cp\u003eThe Pioneer GM-DX874 is a bridgeable four-channel car amplifier designed to add clean, configurable power to an upgraded vehicle audio system. It can drive front and rear speakers independently, or be configured for two- or three-channel applications including a bridged subwoofer channel. This makes it a practical choice for listeners building a full-range system now or planning a staged upgrade.\u003c\/p\u003e\u003cp\u003eIts continuous output is rated at 100 watts RMS per channel at 4 ohms, 150 watts RMS per channel at 2 ohms, and 300 watts RMS per bridged pair at 4 ohms. The wide 10 Hz to 50 kHz frequency response supports full-range speaker systems and high-resolution playback-capable sources. Class-D operation helps deliver this power from a compact chassis that is easier to place than many conventional amplifiers.\u003c\/p\u003e\u003cp\u003eSeparate variable high-pass and low-pass filtering lets the GM-DX874 be matched to speakers or subwoofers. Both crossover ranges adjust from 40 Hz to 500 Hz with a 12 dB\/octave slope. This helps remove unnecessary low bass from smaller speakers or limit a subwoofer channel to low-frequency content.\u003c\/p\u003e\u003cp\u003eThe amplifier accepts RCA-level and speaker-level signals, allowing it to work with many aftermarket receivers as well as compatible factory-radio systems. Automatic signal sensing can turn the amplifier on when it detects a speaker-level input signal, though a system remote wire may be needed with some head units. A two-channel\/four-channel input selector provides additional flexibility when planning system wiring.\u003c\/p\u003e\u003cp\u003eFor bass-focused channel B setups, the included wired bass boost remote adjusts 50 Hz boost from 0 dB to 18 dB. Gold-plated RCA connections, audio film capacitors, and a low-impedance output-filter coil support the amplifier's signal path. Built-in protection monitors abnormal conditions and can mute or shut down output if overheating, DC output, or a speaker-wire short is detected.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class-D Amplification:\u003c\/strong\u003e Powers four speakers or supports bridged system configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100W RMS Per Channel:\u003c\/strong\u003e Delivers rated continuous power at 4-ohm stereo loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable HPF And LPF:\u003c\/strong\u003e Adjusts crossover points from 40 Hz to 500 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Frequency Range:\u003c\/strong\u003e Extends from 10 Hz to 50 kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Input:\u003c\/strong\u003e Connects to compatible factory-radio speaker outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWired Bass Boost Remote:\u003c\/strong\u003e Adjusts channel B bass boost from 0 dB to 18 dB.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe GM-DX874 uses a compact 252 mm × 60 mm × 215 mm chassis and weighs 2.5 kg without wiring leads. Its connection layout includes RCA inputs for channels A and B, an RCA pass-through output from channel A, block-style power and speaker terminals, and a POWER\/PROTECT indicator. The amplifier incorporates gold-plated RCA connections and a protection system for temperature, DC-output, and short-circuit conditions.\u003c\/p\u003e\u003cp\u003eInstall it in a rigid, well-ventilated location with clearance above the chassis; do not cover it with carpet or a floor mat. The amplifier is intended for 12 V negative-ground vehicles and requires separately sold battery, ground, signal, and fuse components; Pioneer specifies an 80 A external battery-line fuse within 30 cm of the positive battery terminal. Use 8 AWG to 16 AWG speaker wire, match speaker impedance to the selected configuration, and set gain and crossover controls after wiring is complete.\u003c\/p\u003e","brand":"Pioneer","offers":[{"title":"Default Title","offer_id":45633217888326,"sku":"GM-DX874","price":376.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/61nQcSz1iqL.jpg?v=1784418239","url":"https:\/\/audiowatt.store\/products\/pioneer-gm-dx874-4-channel-class-d-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}