Phoenix Gold RSD250.2 2-Channel Amplifier Power Output (RMS @ 4ohms and 1% THD+N): 76W x 2 Additional Power Output (RMS @ 2ohms and 1% THD+N): 113W x 2 Signal to Noise Ratio (1W output @ 4ohms): 85dBA Frequency Response: 20Hz-20kHz Effective Damping Factor (@ 4ohms): 6.37 Maximum Input (at clipping): 8.5V Maximum Sensitivity (at clipping): 200mV Built-in 18dB per Octave Crossover On Board Protection High Speed High Current Mosfet Switching Power Supply Line Level Inputs Wide Range Input Sensitivity Adjustment Multi-function Protection Indicator Variable Bass Boost Dimensions (W x H x D): 12.9" x 2.4" x 11.2"