Amazon.com: MTX RT8PT 8" 240 Watt Amplified Loaded Subwoofer Tube Audio Set w 8 Ga. Amp Wiring Kit : Electronics
MTX TS82 8" full-range 2-way truck boxes at Crutchfield
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TNE212D Dual 12" TERMINATOR Series 800-Watt Peak Power Subwoofer Enclosure | MTX - Serious About Sound®
MTX Audio 10" 300W 84.9 dB 4 OHM Single Voice Coil Subwoofer | TN10-04 (8 Pack) - Walmart.com