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About this product

The JBL® MS-A1004 is a flexible, four-channel digital car audio amplifier. Its DSP-based digital input mixer offers programmable active crossovers that include slope, bandwidth and precise filter points. The input mixer also controls accurate output levels. Channel pairs are bridgeable with fully configurable input-signal steering. Rated power output is 4 x 100 watts RMS into 4 or 2 ohms (2 x 200 watts RMS bridged). Onboard pass-through outputs allow easy connection to additional amplifiers. This amplifier easily connects to line-level inputs or (with included RCA-to-bare-wire adapters) to speaker-level inputs, making it an easy upgrade for a system amplifier in any car.

Warranty: 1 Year Warranty
Model: MS-A1004

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Owner's Manual


Your MS-A1004 may currently be in-warranty.

Your model might be eligible for direct factory exchange under our warranty program. If so, and if you purchased your product online or from an authorized local retailer, you may use this form to request an exchange. Purchases made from an unauthorized dealer will not be eligible for exchange. 

Products under warranty may qualify for an exchange with a valid receipt.

Request an Exchange

Products out of warranty need to be serviced by a JBL-approved service center. Please call 1-800-336-4525 to find authorized service centers near you.