Product Description Class D Digital Mono block Amplifier. Full MOSFET PWM Power Supply SMD Technology on Double Sided PCB. 8ga Power & 8ga Speaker Output Terminals High & Low Level Signal Inputs. Remote Mount Gain Control Included. Variable 35-250Hz 12dB Low Pass Filter Variable 10-50Hz 12dB Subsonic Filter Variable 0-12 dB 45Hz Bass Boost. 600w x 1 @ 4-ohm Mono. 900w x 1 @ 2-ohm Mono. Total Harmonic Distortion: 0.5%. Frequency Response: 20-150 kHz. Signal-to- Noise Ratio: 70dB Damping Factor: > 250 Input Sensitivity: 200mV-6V MINIMUM SPEAKER IMPEDANCE: 2 OHM ONLY Dimension: 4.75"w x 1.5"h x 8"l