AlpineKTX-H12 Linking Kit for Dual 12" Alpine Halo Preloaded Subwoofer Enclosures with ProLink™

Alpine KTX-H12 12" Halo Subwoofer Encl Prolink Kit

Alpine RUX-KNOB.2 Remote Bass Knob

Alpine S-A32F S Series 4 Channel Digital Amplifier 80 Watts RMS x 4, 2 Ohms