K1000 | High-performance mono car audio subwoofer amplifier
Amazon.com: Infinity Kappa OneK 1000 -Class D, 1000W Mono Subwoofer Amplifier with LPF, Low- and High- Level Inputs, RBC (Remote Bass Control) included : Electronics
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,