{"product_id":"rockford-fosgate-pbr400x4d-compact-4-channel-amplifier","title":"Rockford Fosgate PBR400X4D Compact 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Punch PBR400X4D is a compact four-channel car audio amplifier for systems that need added speaker power where installation space is limited. It delivers full-range Class D amplification for front-and-rear speakers, component systems, or other four-channel applications. Its compact chassis is well suited to cars, trucks, motorcycles, ATVs, and similar vehicles where a conventional amplifier may be difficult to place.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the PBR400X4D provides 50 watts RMS to each of four channels, with up to 100 watts RMS per channel at 2 ohms. It can also be bridged to run two 4-ohm channels at 200 watts RMS each. This flexibility lets it support a straightforward four-speaker upgrade or a higher-output two-channel configuration when paired with compatible speakers.\u003c\/p\u003e\u003cp\u003eThe amplifier uses a full-range Class D design with Rockford Fosgate Boosted Rail Technology. This approach is designed to provide its rated output in a small enclosure while operating from a 9 to 16 VDC vehicle electrical system. The result is a practical option for compact systems that need efficient amplification without the larger footprint of many conventional multi-channel amplifiers.\u003c\/p\u003e\u003cp\u003eIts differential signal inputs accept either low-level RCA signals or high-level speaker signals from a source unit. When high-level input is used, the amplifier supports automatic turn-on behavior, which can simplify integration with many factory radios. A 2-channel\/4-channel input selector also allows four amplified outputs to be operated from only the front input pair when needed.\u003c\/p\u003e\u003cp\u003eSelectable fixed crossovers help tailor the amplifier to the speakers and system layout. Each channel section can be set for low-pass, all-pass, 60 Hz high-pass, or 80 Hz high-pass operation. Front and rear gain controls, along with input and output clip indicators, provide useful setup references when matching the amplifier to the source unit and speakers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Power:\u003c\/strong\u003e Delivers 50 watts RMS to each channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Outputs:\u003c\/strong\u003e Provides up to 100 watts RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Runs as two 200-watt RMS channels at 4 ohms bridged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Chassis:\u003c\/strong\u003e Measures approximately 6.8 by 4.3 by 1.5 inches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Signal Inputs:\u003c\/strong\u003e Accepts RCA or speaker-level source signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Offers LP, all-pass, 60 Hz HP, and 80 Hz HP settings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe PBR400X4D uses a compact metal amplifier chassis with integrated connection harnesses rather than large conventional terminal blocks. Its design includes separate front and rear gain controls, clip-status indicators, crossover selectors, and power\/protection indication. The small format helps accommodate installations with restricted mounting space while still providing four amplified channels.\u003c\/p\u003e\u003cp\u003eFor installation, connect compatible 2-ohm or 4-ohm speakers to the four outputs, or bridge channel pairs only with 4-ohm speaker loads. The amplifier accepts RCA-level input through its signal harnesses, while the same input arrangement can be adapted for high-level speaker input; high-level operation activates its auto turn-on feature. Use appropriately sized power wiring, install the specified external fuse near the battery, provide a clean chassis ground, and leave adequate ventilation around the amplifier.\u003c\/p\u003e","brand":"Rockford Fosgate","offers":[{"title":"Default Title","offer_id":45637242781766,"sku":"PBR400X4D","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/717JKXiU76L.jpg?v=1784433195","url":"https:\/\/audiowatt.store\/products\/rockford-fosgate-pbr400x4d-compact-4-channel-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}