Hifonics BXi3000D. Total Harmonic Distortion (THD): 0.03 %, Signal-to-Noise Ratio (SNR): 90 dB, Impedance: 47000 Ом. Connectivity technology: Wired. Depth: 410 mm, Height: 60 mm. Power requirements: 12 V DC / 70A, Dimensions (WxDxH): 260 x 60 x 380 mm