Audiofrog GB12D2 GB Series 12" dual 2-ohm subwoofer at Crutchfield
Audiofrog 12" GB Dual 4 Ohm Mobile Subwoofer - GB12D4
Amazon.com: Pair of Gravity 15 Inches Car Audio Subwoofer 3200 Watts Peak Power (1600x2) RMS Power 80 Watts Each with Dual Voice Configuration 4 Ohm Power (2 Woofers) : Electronics
Audiofrog 12" GB Dual 4 Ohm Mobile Subwoofer - GB12D4
Subwoofers PC-SUB WL10 GB PhaseTech 10" Wireless Subwoofer in Gloss Black | SoundTube Entertainment
Audiofrog 10" GB Dual 4 Ohm Mobile Subwoofer - GB10D4
GB audio active subwoofer 420watt - Lakro Autostyling en Audio
Audiofrog GB12D4 GB Series 12" dual 4-ohm subwoofer at Crutchfield