Pioneer GM-D7400M. Total Harmonic Distortion (THD): 0.3 %, Signal-to-Noise Ratio (SNR): 80 dB, Impedance: 4 Ом. Connectivity technology: Wired. Weight: 2600 g. Dimensions (WxDxH): 225 x 200 x 56 mm, Output power: 400 W