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Rockford Fosgate 400-Watt Bass Package Includes R500X1D amplifier, P2D4-12 12" subwoofer, and Sound Ordnance BB12-125S sealed enclosure at Crutchfield
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I KEY BUY 202mm 8 Inch Car Subwoofer 400W 4 Ohm Big Red Foam Edge Surround for Audio System Modified DIY Bass Woofer - AliExpress
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Massive Audio Gtx Series 8-inch 400-watt-rms Dual 4-ohm Subwoofer in the Mobile Audio department at Lowes.com
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Amazon.com: DS18 SRW10.4D 10" Shallow Car Subwoofer - 400 Watts, Dual Voice Coil, 4+4 Ohms Impedance (1 Speaker) : Everything Else
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RW8D2 Echo Series 8 Inch 400 Watts Power Dual 2 Ohm Voice Coil, 2" Black-Coated 4 Layer High Temperature Voice Coil, Competition Grade Pressed Paper Cone, Car Audio Subwoofer - Recoil Audio
MTX TN12-04 12 400 Watt Sub Woofer Car Audio Power Bass Subwoofer TN1204, 1 Piece - Fry's Food Stores
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Amazon.com: MTX TN12-02 12" 400 Watt Car Audio Bass Subwoofer + Vented Ported Box Enclosure : Electronics
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MASSIVE AUDIO 8" Pre-Loaded 400 Watt RMS 2-Ohm Subwoofer in Ported Enclosure. CAR AUDIO BG8 - Cyberstore
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