Alpine R-A90S Marine Speakers The woofer design benefits from

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Alpine R-A90S Marine Speakers The woofer design benefits fromFor 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"