The Alpine SBG-30KIT is a bundled bass upgrade that includes a preloaded 12 inch SBG-30BR bass reflex subwoofer, the digital V-Power MRV-M250 mono amplifier and a complete wiring kit. A wired remote bass level control is included for quick level adjustments from the cabin.

The subwoofer ships installed in a bass reflex enclosure for extended low-frequency output while the MRV-M250 provides compact digital amplification. The wiring kit provides power, ground and speaker connections. Vehicle fitment is not included and must be confirmed for each application.