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Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
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Amazon.com: Hifonics HFX12D4-PAIR 400-Watt 12-Inch HF Series Dual 4-OHM Subwoofer, Set of 2 : Electronics
Sundown Audio E-15 v4 D4 15" 500W RMS Dual 4-Ohm Subwoofer : Electronics - Amazon.com
Amazon.com: 2 x 12 Subwoofer 1200W 2" 4 Ohm DVC Pro Car Audio American Bass XO-1244 : Electronics
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Amazon.com: Pyle PLPW15D 15" 8000W Car Subwoofer Audio Power Subs Woofers DVC, 2 Pack with Black Steel Basket, Non Press Paper Cone and 4 Ohm Impedance : Electronics
SA – 12 D4 REV. 3 – Sundown Audio 12 W Dual 4 – Ohm SA Series Subwoofer by Sundown Audio : Electronics - Amazon.co.jp
Amazon.co.jp: Skar Audio VD-10 D4 10" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : 車＆バイク
Amazon.com: Skar Audio EVL-65 D4 6.5" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Alpine S-W10D4 S-Series 10" Dual 4-Ohm Subwoofer : Electronics
