- 1300w max power output
- 370w x 1 - rms 4?
- 550w x 1 - rms 2?
- Class d amp technology
- Variable low-pass filter (32-320 hz, 12 db/octave)
Infinity Reference REF-551A Mono Subwoofer Amplifier
(JBL Infinity REF551A)
We Think You Should Know
550W RMS at 2 ohms
370W RMS at 4 ohms
10Hz - 320Hz frequency response
Variable bass boost and subsonic filter
Phase control for system integration
Overview
The Infinity Reference REF-551A is a mono subwoofer amplifier engineered to deliver powerful, dedicated low-frequency amplification for car audio systems. With 550W RMS at 2 ohms and 370W RMS at 4 ohms, this Class A/B amplifier provides ample power for demanding subwoofer installations. The 10Hz-320Hz frequency response ensures deep, accurate bass reproduction, while variable bass boost, subsonic filter, and low-pass filter allow precise tuning. Phase control optimises subwoofer integration with existing speakers, making this compact amplifier ideal for enthusiasts seeking authoritative bass performance.