Alpine R-A90S Marine Speakers The rugged medium-density fiberboard enclosure

The rugged medium-density fiberboard enclosure is only 5

the MMP-1-BK includes stainless-steel hardware and a full-surface gasket to ensure a secure and watertight installation

4 Volts 4 x 125 Watts @ 4

If you need a small-format subwoofer that really delivers in extremely small enclosures

Subwoofer Volume

Alpine R-A90S Marine Speakers The rugged medium-density fiberboard enclosureFor loud and realistic sounding music Into high res music? Alpine's R Series R A90S amplifier reproduces high frequency sounds up to 45,000 Hz, so you can enjoy the clean sound and enhanced realism you want in your music. Alpine applied some hot technology from their top of the line X Series amplifiers into this R Series amp, including the use of high efficiency transformers and premium custom capacitors in the amp's construction. Dual "Sierra"