{"product_id":"rockford-fosgate-pm400x4-4-channel-marine-amplifier","title":"Rockford Fosgate PM400X4 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Rockford Fosgate PM400X4 is a four-channel marine and motorsports amplifier built to add clean, configurable power where a source unit alone is not enough. It is designed for boats, off-road vehicles, and other installations exposed to demanding environments. Its four-channel layout supports front and rear speakers, component systems, or mixed speaker-and-subwoofer configurations.\u003c\/p\u003e\u003cp\u003eRated at 50 watts RMS per channel at 4 ohms, the PM400X4 provides an appropriate power range for many marine coaxial and component speakers. It can also deliver 100 watts RMS per channel at 2 ohms, or 200 watts RMS to each of two bridged 4-ohm channels. This flexibility lets an installer tailor the amplifier to a straightforward four-speaker system or a three-channel system with speakers and a subwoofer.\u003c\/p\u003e\u003cp\u003eThe amplifier uses Class A\/B circuitry for full-range amplification across a 20 Hz to 20 kHz frequency response. Variable high-pass and low-pass crossover controls allow speakers and subwoofers to be assigned more suitable frequency ranges. A built-in Punch EQ provides adjustable bass enhancement at 45 Hz, with treble adjustment also available for additional tonal tuning.\u003c\/p\u003e\u003cp\u003eFor marine and powersports use, the PM400X4 combines a cast-aluminum heatsink with a marine-grade two-part epoxy-coated circuit board and stainless-steel hardware. These construction details are intended to help protect the amplifier's electronics and mounting hardware in moisture-prone installations. Short-circuit, over-current, and thermal protection circuits add operational safeguards.\u003c\/p\u003e\u003cp\u003eInstallation flexibility includes low-level RCA inputs, high-level input capability, and an automatic turn-on circuit for compatible factory-style speaker-level signals. The 2\/4-channel input selector can simplify signal routing when the source unit has only one pair of outputs. C.L.E.A.N. setup indicators help with gain adjustment, while RCA pass-through outputs can support expansion with another amplifier.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class A\/B Design:\u003c\/strong\u003e Powers front and rear speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible RMS Output:\u003c\/strong\u003e Supports 4-ohm, 2-ohm, and bridged system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Helps direct appropriate frequencies to speakers or subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePunch EQ:\u003c\/strong\u003e Adds adjustable bass and treble tuning capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Grade Construction:\u003c\/strong\u003e Uses epoxy-coated circuitry and stainless-steel hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Input Capability:\u003c\/strong\u003e Works with compatible speaker-level source signals.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe PM400X4 uses a cast-aluminum heatsink, a stealth top-mounted control panel, marine-grade stainless-steel hardware, and a two-part epoxy coating on its circuit board. Its compact amplifier chassis measures 2.38 by 7.76 by 11.03 inches. Convection cooling and protection circuitry are integrated for normal operating use.\u003c\/p\u003e\u003cp\u003eMount the amplifier in a secure location with ventilation and protection from direct water exposure. Use 4 AWG or 8 AWG power wire, install the required external 60-amp fuse, and match speaker wiring to loads no lower than 2 ohms per channel or 4 ohms when bridged. The variable 50-250 Hz crossover, input selector, and C.L.E.A.N. indicators should be set during installation to suit the connected speakers, subwoofers, and source unit.\u003c\/p\u003e","brand":"Rockford Fosgate","offers":[{"title":"Default Title","offer_id":45637708120134,"sku":"PM400X4","price":519.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/71Rvm7S_PML.jpg?v=1784433431","url":"https:\/\/audiowatt.store\/products\/rockford-fosgate-pm400x4-4-channel-marine-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}