RE Audio USX45KV1 Monoblock 4500 Watt Class D Digital Amplifier Dynamic Power: 4500 W, RMS Power (4@14.4V): 600 W x 1, RMS Power (2@14.4V): 1000 W x 1, RMS Power (1@14.4V): 1500 W x 1 Full Digital, With MLT connection, THD: &lt;0.1 %, SN Ratio: 80 dB, Frequency Response: 15 Hz ~ 250 Hz Crossover Frequency(Low Pass): 40 ~ 250 Hz, Crossover Frequency(Subsonic): 15 ~ 40 Hz, Bass Boost Control: 0 ~ 20 dB, Wired Remote Control: Yes, Input Sensitivity: 0.2 ~ 8 V Heatsink Size(WxLxH) [inches]: 9.65 x 17.72 x 2.05, Heatsink Size(WxLxH) [mm] : 245.11 x 450.09 x 52.0, Fuse Rating: 40 A x 3