Amazon.com: Timpano 15" Sub D4 1600 Watts Max Power Dual 4 Ohm, 15 Inch Car Subwoofer 16 mm Xmax, TPT-T1500-15 D4, 2.6 in Voice Coil, Double Stacked Magnet Sub Woofer for Car
Amazon.com: Timpano Audio: Subwoofers
Single 12" Loaded Subwoofer Enclosure Sub Vented Box TPT-T2500-1x12 D2 – Robidoux Inc
Timpano 15" Subwoofer Dual 4 Ohm 2500 Watts Max Power TPT-T2500-15 D4 Single - Walmart.com
Amazon.com: Timpano 12" Sub D4 2500 Watts Max Power Dual 4 Ohm, 12 Inch Car Subwoofer 23.5 mm High Xmax, TPT-T2500-12 D4, 3 in Voice Coil, Competition Sub Woofer for Car Audio