Alpine RUX-KNOB.2 Bass Knob Controller Digital Multimedia Receiver these bad boys have patented

these bad boys have patented VAST technology that increases surface cone area up to 25% so the T1D412 performs like a much larger woofer over the previous model

And it's made to stand up to life on the road

Impedance: 4Ω

GPSMAP 7400/7600 and GPSMAP 8400/8600 chartplotters and MFDs

and connect optional physical switches

Alpine RUX-KNOB.2 Bass Knob Controller Digital Multimedia Receiver these bad boys have patentedProduct highlights: remote level controller for Alpine amplifiers mono amps sub channel of 5 channel amps bridged channels 3 4 of the X A70F adjusts gain from 0 to 12 dB multi amp capable (standard phone cable splitter required not included) 16' connection cable warranty: 1 year