Infinity Kappa 1000W Kappa Series 10" subwoofer with selectable 2- or 4-ohm impedance at Crutchfield
JBL Club A600 High Performance Compact Class D Car Audio Mono Subwoofer Amplifier Bundle with Infinity KAPPA 1000W 10" High-Performance 1800W Peak Power Car Audio Subwoofer and Amplifier Wiring Kit - Road
Infinity Kappa 1200W 12" 1200 Watt Car Audio Subwoofer, Black - Walmart.com
These are the specs of my Sub(Infinity Kappa 1000w) paired with xm-gs100 amp, everything set to 4ohm, i find the bass to be lacking and it's all boomy even this feels empty,