Best Buy: MTX Terminator 10" Single-Voice-Coil 4-Ohm Subwoofer with Enclosure TN10-04
MTX Thunder8000 T8154 15" Component Subwoofer at Crutchfield
MTX Thunder T4500 2003 Car Subwoofer Archive | MTX Audio - Serious About Sound®
Car Subwoofer 15 "38 Cm Mtx Rt15-04 Sound Electronics Columns 94.7db Subwoofers For Cars Acoustics Auto Audio Parts Components Speaker - Subwoofers - AliExpress
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2) MTX 7515-44 15" 1500w RMS Subwoofers+Vented Sub Box Enclosure+Amplifier+Wires