Alpine SPS-M601 Drive Assist the amplifier's subwoofer channel level

the amplifier's subwoofer channel level or overall level can be directly controlled from a remote location

The remaining red/black wire can be used to wire the speaker to the amplifier's output terminals

37 in / 9 mm Mounting Hole Diameter (D) 6

If you need to quickly add bass to a system but don't have much space or height to make it happen

and USB cable

Alpine SPS-M601 Drive Assist the amplifier's subwoofer channel levelAbout the Alpine SPS M601 High tide, high volume An afternoon out on the water is a pretty great thing already, but it's even better when you add great sound. Alpine designed their SPS M601 marine speakers to look good, sound good, and stand up to conditions that would turn lesser speakers into paperweights. Alpine built these speakers to handle plenty of power, so they'll cut right through the wind, waves, and motor noise to give you the high