Amazon.com: Infinity - Two Kappa 12" (300mm) 500 Watt RMS, High-Performance Subwoofers, Switchable 2 OR 4 OHM : Electronics
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 1000W Kappa Series 10" subwoofer with selectable 2- or 4-ohm impedance at Crutchfield
Infinity Kappa Series Subwoofers | CES 2016 - YouTube
Infinity Kappa 103WDSSI 10" (250mm) High-Performance Car Audio Subwoofer - Each - Walmart.com
Infinity Kappa K1000 Mono subwoofer amplifier — 1,000 watts RMS x 1 at 2 ohms at Crutchfield
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,