JL Audio RD400/4
- Featured in our article: Best 4-channel car amplifiers for 2025
- 4-channel car amplifier
- 75 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
- 200 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
- Class D amplifier design with NextD™ switching amp technology
- differential-balanced inputs help eliminate noise
- variable low- and high-pass filters (50-500 Hz, 12 dB/octave)
- LED clip lights help set gain
- blue LED accent lighting
- preamp inputs and outputs
- speaker-level inputs (speaker wire to RCA adapter required)
- 4-gauge power and ground leads and a 40-amp fuse recommended — wiring and hardware not included with amplifier
- no onboard fuses — when installing multiple amps in a system, an additional 40-amp in-line fuse between the distribution block and the amplifier is recommended
- 9-13/16"W x 2-1/8"H x 7"D
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