1500W RMS R-Series Class-D 6-Channel Amplifier + Remote Bass Knob for Alpine Amplifiers. Alpine R-A90S with RUX-KNOB.2. 900W RMS Class D R Series 6 Channel Car Amplifier. Alpine R-A90S. Works with Alpine X-A70F, Alpine MRV-M500, Alpine PDX-V9, Alpine X-A70F, Alpine X-A90V, Alpine X-A90M.
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