The Skar Audio DDX-12 D2 is a competition grade, 12-inch, dual 2-ohm, car subwoofer. Skar Audio engineered the RP-1500.1D Class D monoblock subwoofer amplifier to be dominant in both power and reliability compared to anything else on the market in its' class. The DDX line-up was engineered by Skar Audio to be an SPL grade woofer that could also be utilized in daily system applications, allowing non-competitors to use the same subwoofers … The Skar Audio ZVX-18v2 D1 18-inch dual 1-ohm subwoofer is an ultimate powerhouse driver, unrivaled in performance and reliability. Skar Audio RP-1500.1D … The ZVX-18v2 offers the perfect combination of size and power, … The ZVX-18v2 offers the perfect combination of size and power, … The Skar Audio ZVX-18v2 D2 18-inch dual 2-ohm subwoofer is an ultimate powerhouse driver, unrivaled in performance and reliability.