Infinity KAPPA FOUR High-performance multi-channel Class D amplifier - Creative Audio
Amazon.com: Infinity Kappa Four - Four Channel Class D Car Audio Amplifier : Electronics
Archimago's Musings: MEASUREMENTS: Melody Onix SP3 Mk. II (~2006) Class AB Tube Integrated Amplifier. (And it isn't "diminishing returns" on sound quality, often there are simply "no returns".)
Infinity Car Audio Amplifiers in Motors for sale | eBay
Amazon.com: Infinity Kappa Four - Four Channel Class D Car Audio Amplifier : Electronics
Amazon.com: Infinity Kappa Four - Four Channel Class D Car Audio Amplifier : Electronics
Infinity Kappa Four 4-channel amplifier — 125 watts RMS x 4 at Crutchfield
Infinity Kappa Four 4-channel amplifier — 125 watts RMS x 4 at Crutchfield
Amazon.com: Infinity Kappa Four - Four Channel Class D Car Audio Amplifier : Electronics
Infinity Kappa One, Four and Five Car Amplifiers - ecoustics.com