CPS Extended Service Plan (more info)
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The GT-RSL remote subwoofer level control module from Boston Acoustics allows you to adjust your bass/gain level from the drivers seat. This means you can tune your subwoofer output to properly compliment your currently playing selection of music to your tastes.
400W 5-Channel GTA Series Car Amplifier
12" 1200W 4-Ohm Dual Voice Coil SWR Series Type-R Car Subwoofers