The Diamond Audio HX400.2 2 Channel Amp rated at 400 watts RMS is PERFECT for the audio perfectionist that needs clean power to a set of speakers. Anodized extruded aluminum heat sink provides superior thermal stability Four layer, glass epoxy circuit board for enhanced performance and reliability Audiophile grade high-tolerance components used throughout Full Range Class D amplifier technology Bridgeable for high power operation Balanced differential inputs for superior noise rejection Output clip indicators for precise system set-up Fully variable, 24dB per octave, electronic crossover Adjustable Bass EQ (45Hz: 0dB to +12dB) / remote level control included Top mounted controls for convenient adjustment Illuminated logo / fully concealed mounting Diamond Audio HX400.2 Owner's Manual Specs RMS Power Rating RMS Power (4Ω): 200 W X 2 RMS Power (2Ω): 350 W X 2 Bridged(mono 4Ω): 700 W X 1 Bridged(mono 2Ω): N/A Bridged(stereo 4Ω): N/A Type Topology: Full Range Class D Power Supply Power Supply: Full PWM Power Supply Threshold: 10.0VDC-17.0VDC Idle Current: (0.7A) Distortion THD 4(1KH@4Ω) : 0.06% S/N Ratio(A weighted@1W): -80dBA S/N Ratio(A weighted@FP): -95dBA Input Sensitivity Low Input Level: 200mV-5.0V High Input Level: N/A Input Impedance Low Input Level: 20 KΩ High Input Level: N/A Output Stage Output Impedance: 0.011 Ω Damping Factor(50Hz@4Ω): >250 Bandwidth(-3dB): 10Hz-35KHz Crossover(-12dB/Oct) Variable High-Pass: 40Hz-400Hz Variable Low-Pass: 40Hz-400Hz Variable Sub-Sonic: N/A Fuse Ratings ATC: 25A X 2 Dimensions Length x Width x Height(Inches): 8.75" X 6.8" X 2" Length x Width x Height(mm): 222 x 195 x 51.5