The Rotel RB-930AX stereo power amplifier delivers 30 watts per channel into 8 ohms in stereo mode and 90 watts in mono mode, with a frequency response of 15Hz to 100kHz and a total harmonic distortion of 0.03%. It has a signal-to-noise ratio of 116dB and is designed to work with speaker loads of 4 to 16 ohms.