40 watts x 2 channels into 8 ohms (20-20,000 Hz) at 0.03% THD 4-ohm stable for use with a wide range of speakers signal-to-noise ratio: 100 dB PowerDrive-S™ technology for more dynamic power output large toroidal power transformer for a strong, low-noise power supply rotary bass and treble controls with defeat switch for tone control bypass 5 RCA audio inputs including 1 MM phono input