The PowerBass PBX Series Amplifiers are the cleanest most efficent amplifiers we have built to date, with attention to sonic accurracy, clarity, and a bold use of efficient power, this series is guaranteed to have smiling with pure musical enjoyment. PBX Ultra High Efficiency Amplifiers are the result of extensive engineering and testing to develop the best sounding and most efficient power delivery we have ever produced. With the success of our previous XMA series our engineers went to work on the PBX Series with the goal of creating true works of art featuring high quality parts and an ultra efficient circuit design proving to be some of the best Class D amplifiers on the market today. The PBX Series represents the very latest in Class D Technology. IR, a leader in PWM circuit design, has worked in conjuction with PowerBass engineers to produce more stable power output, minimal RF interference and improved sound quality. Specifications - • Peak Power: 1400 watts • Subwoofer Frequency Range: 10 Hz - 250 Hz • Inputs: 3 Pairs RCA (speaker level compatible) • Dimensions (in Inches): 13.25x7x2.25 • Depth: 13.25 • Channels (mono): 5 • 4-ohm Power: 100 watts x 4 + 500 watts x 1 • 4-ohm Mono Power: 400 watts x 2 + 500 watts x 1 (4-ohm) • 2-ohm Power: 150 watts x 4 + 800 watts x 1 • 1-ohm Mono Power: N/A • Variable Subsonic Freq: 10Hz - 50Hz • Height: 2.25 • Width: 7 • Subwoofer EQ Frequency: 45Hz • Variable Subwoofer EQ: 0-18db • Low-Pass Crossover Freq: 25 Hz - 250 Hz • High-Pass Crossover Freq: 50 Hz - 350 Hz • Crossover Slope: 12 dB • Input Sensitivity: 0.25 V - 10.0 V • S/N Ratio: >90 dB • Strapped Output Power @ 2ohms: N/A • Output Power (14.4 V) @ 4 ohm: 100 watts x 4 + 500 watts x 1 • Output Power (14.4 V) @ 2 ohm: 150 watts x 4 + 800 watts x 1 • Output Power (14.4 V) @ 1 ohm: N/A • Frequency Response: 10 Hz - 40 kHz