Kenwood KAC-5206 400W Max 2-Channel Class AB Performance Series Car Amplifier Maximum Power Output: 400W, Amplifier Type: Class AB, Signal to Noise Ratio: 95dB (Reference: Rated Power into 4Ohms at 14.4V) Frequency Response: 5Hz-50kHz (+0dB, -3dB), Input Impedance: 10k ohm, Speaker Impedance: 4 (2 to 8 allowable) Bridged connection 4 to 8 allowable Low Pass Filter: 80 Hz (-18 dB / oct.)