MTX Thunder 5000 T5128 12" 8-ohm Component Subwoofer at Crutchfield
Best Buy: MTX 12" Single-Voice-Coil 4-Ohm Subwoofer US-XT12-04
MTX Road Thunder Pro Subwoofer 15” Speaker Vintage Original Old Stock Tested | eBay
MTX RFL15 product page
2) MTX 7515-44 15" 1500w RMS Subwoofers+Vented Sub Box Enclosure+Amplifier+Wires
MTX Audio T9515-44 15" Dual 4 ohm Thunder9500 Superwoofer (T9500)
Discontinued Obsolete SKU | MTX Audio - Serious About Sound®
(2) MTX 7515-44 15" 1500 Watt RMS Car Audio Subwoofers+Vented Sub Box Enclosure
MTX 5515-22 55 Series 15" subwoofer with dual 2-ohm voice coils at Crutchfield
Discontinued Obsolete SKU | MTX Audio - Serious About Sound®
Amazon.com: MTX RTS12-04 12-Inch Single 4-OHM Round Subwoofer
Discontinued Obsolete SKU | MTX Audio - Serious About Sound®
Amazon.com: MTX Audio Terminator Series TNE212D 1,200-Watt Dual 12-Inch Sub Enclosure : Electronics
Discontinued Obsolete SKU | MTX Audio - Serious About Sound®
Amazon.com: MTX Audio 7515-44 75-Series 15" 750W RMS Dual 4-Ohm Subwoofer : Electronics
2) MTX 7515-44 15" 1500 Watt RMS Competition Subwoofers DVC 4ohm Car Audio Subs - Walmart.com
MTX 9515-22 15" 3000w Competition Car Audio Subwoofer+Vented Sub Box Enclosure | Audio Savings
MTX T5515-04 15 Inch Subwoofer 4 Ohm 300 Watts RMS | T5515-04
MTX RTS15-44 Road Thunder Series 15" subwoofer with dual 4-ohm voice coils at Crutchfield
