Amazon.com: Skar Audio DDX-15 D2 15" 1500 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: Skar Audio DDX-12 D2 12" 1500 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Skar Audio DDX-12 D4 12" 1500 Watt Max Power Dual 4 Ohm Car Subwoofer [DDX -12 D4]
2.6 cubes(maybe a tiny bit less) tuned to 35, port is like 38”, Skar DDX-12, kicker 1800.1(metered it to around 1500) sub sounds like it's bottoming out, tried several bass frequencies sweeps