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Amazon.co.jp: PowerBass S84 S-Series 8-Inch Single 4 Ohm Subwoofer by PowerBass : 家電＆カメラ
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Amazon.com: Hifonics HFX12D4-PAIR 400-Watt 12-Inch HF Series Dual 4-OHM Subwoofer, Set of 2 : Electronics
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Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Earthquake 10" Subwoofer, 4 Ohm Dual V. C. , Push On Terminals : Automotive - Amazon.co.jp
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Amazon.com: Harmony Audio HA-R104 Car Stereo Rhythm Series 10" Sub 500W Single 4 Ohm Subwoofer : Electronics
Amazon.com: MTX TN10-04 10-Inch Single 4-OHM Subwoofer 150-Watt RMS : Electronics
Amazon.co.jp: JINGERL Subwoofer 4 Inch 4 Cup 40W HIFI Subwoofer Speaker 8OHM 4OHM WOOFER Audio Sound Speaker Base Speaker DIY 1 Piece (Color: 4ohm-1Piece) : Electronics
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Amazon.com: Audiopipe TXX-BD2-12 12 Inch High Performance 1500 Watt Max Power Car Audio Subwoofers with Dual 4 Ohm Voice Coil (2 Pack) : Electronics
Amazon.co.jp: Audiopipe 10" Woofer 4 Ohm DVC 800 Watts Max : Audiopipe: 家電＆カメラ
Amazon.com: Memphis Audio MJP1244 12 in 1500 Watt MOJO Pro Car Audio Subwoofer DVC 4 ohm Sub, Black : Electronics
Amazon.com: Focal Performance Sub P 30 12" 4-ohm subwoofer : Electronics
