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,
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Infinity Kappa 1000W Kappa Series 10" subwoofer with selectable 2- or 4-ohm impedance at Crutchfield
Infinity Kappa 1000W Kappa Series 10" subwoofer with selectable 2- or 4-ohm impedance at Crutchfield