Infinity Kappa One Mono Car Audio Subwoofer Amp Amplifier 800W RMS 1 OHM STABLE!
Infinity Kappa One Car Audio Stereo Class D Subwoofer Amp Amplifier. MFR # Kappa One. 800 watts RMS. Unofficially 1 OHM Stable. It says it on the original box, but I don't have the box. 500 watts RMS x 1 at 4 ohms (800 watts RMS x 1 at 2 ohms).