Cadence Acoustics Xa300.1 600 Watt Peak Mono Block Class D Amplifier (Orange) Cadence Xa300.1 class D mono block amplifier 200W @ 4 ohm RMS, 300W @ 2 ohm RMS, 600W Xenith Power Frequency Response: 10Hz - 250Hz Minimum THD: 97dB, Damping Factor: &gt;100 @ 100Hz Dimension (L x W x H): 10.4 x 10.5 x 2.6 inches