{"product_id":"jbl-marine-a1504-4-channel-marine-amplifier","title":"JBL Marine A1504 4-Channel Marine Amplifier","description":"\u003cp\u003eThe JBL Marine A1504 is a four-channel marine amplifier designed to add substantial, controlled power to a boat audio system. It can drive four full-range speakers from one compact chassis, making it a practical upgrade when a marine receiver alone does not provide enough output. Its Class D design is intended to provide high output while managing current draw.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to boat owners building a louder multi-speaker system or upgrading existing marine speakers with dedicated amplification. It delivers 150 watts RMS to each of four channels at 4 ohms, with higher output available when using 2-ohm speaker loads. For systems that include subwoofers, the amplifier can also be configured in bridged two-channel or three-channel arrangements.\u003c\/p\u003e\u003cp\u003eVariable high-pass and low-pass crossovers on the front and rear channels help tailor the signal for the speakers being used. Each crossover section adjusts from 32 to 320 Hz with a 12 dB-per-octave slope, allowing full-range speakers to be high-passed or bridged channels to be low-passed for subwoofer duty. Full-range operation is also available when no crossover is needed.\u003c\/p\u003e\u003cp\u003eThe A1504 supports both low-level preamp inputs and speaker-level inputs, helping it work with aftermarket marine receivers as well as many factory systems. Its selectable turn-on mode supports remote turn-on with low-level inputs or DC-sensing operation with high-level inputs. Balanced differential inputs are designed to reduce susceptibility to induced engine noise.\u003c\/p\u003e\u003cp\u003eMarine-oriented construction includes a conformal-coated circuit board and corrosion-resistant stainless-steel connections. Built-in protection circuitry monitors for short circuits, high temperature, overvoltage, and undervoltage conditions, with a power\/protection indicator for status. Full-range preamp outputs also allow a second amplifier to be added without relying on signal splitters.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Power:\u003c\/strong\u003e Supplies 150 watts RMS to each channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Bridging:\u003c\/strong\u003e Provides up to 450 watts RMS per bridged channel pair at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Front and rear high-pass or low-pass filters support system tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- And Low-Level Inputs:\u003c\/strong\u003e Works with RCA preamp outputs or speaker-level signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Focused Construction:\u003c\/strong\u003e Uses a conformal-coated board and corrosion-resistant connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Expansion:\u003c\/strong\u003e Full-range preamp outputs can feed an additional amplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe A1504 uses a low-profile chassis measuring 14-3\/16 inches wide, 2-1\/16 inches high, and 7-1\/8 inches deep. Its Class D platform, conformal-coated circuit board, and corrosion-resistant stainless-steel connections are intended for the environmental demands of marine installations. On-board protection covers short circuits, overheating, overvoltage, and undervoltage conditions.\u003c\/p\u003e\u003cp\u003eJBL recommends 4-gauge power and ground wiring; the amplifier wiring and hardware are not included. Make all wire connections before final mounting, use a location with adequate airflow, and do not mount the heat sink facing downward. The box includes high-level bare-wire-to-RCA adapters, fuses, mounting screws, an owner’s manual, JBL stickers, and a logo badge.\u003c\/p\u003e","brand":"JBL","offers":[{"title":"Default Title","offer_id":45632118456390,"sku":"JBLMA1504AM","price":497.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/51rqVXi4PaL.jpg?v=1784394744","url":"https:\/\/audiowatt.store\/products\/jbl-marine-a1504-4-channel-marine-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}