Model: SX-780 - High output low distortion amplifier - High fidelity equalizer amplifier - Low noise - High Gain - High stability tuner section - Tone controls with tone defeat function - Built-in protection circuits - Independent power meters - Power output: 45 watts per channel - Frequency Response: 5Hz to 80kHz - Total Harmonic Distortion: 0.05% - Damping Factor: 30 - Dimensions: 18.9" X 5.5" X 12.6"