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Cadence DCW12RVC, 30 cm (12 inch) Competition Subwoofer, 1500 W RMS : Amazon.co.uk: Electronics & Photo
BM12D2 | 12" Beast Master Car Audio Subwoofer, 5000W, Dual 2ohms, Each - Beast Master
Cadence 10" Subwoofer 700w Max 4 Ohm DVC S1W10D4V2 for sale online | eBay