The 1200.4 EVO5 amplifier comes with the exclusive patented dtr technology. The dtr is a dynamic thermal recovery system that makes the amplifier always maintain high efficiency by accelerating the thermal exchange of the electronic components with the heatsink. Know what that means An even more reliable and resistant product for you Global patent technology required by SounDigital 1200.4 evo 5.0 4Ohm Power at 12.6V at 1Ohm: n/a Power at 12.6V at 2Ohm: 4 x 300W rms Power at 12.6V at 4Ohm: 4 x 198 W rms Power at 14.4V at 1Ohm: n/a Power at 14.4V at 2Ohm: 4 x 335 W rms Power at 14.4V at 4Ohm: 4 x 221 W rms Bridge Power at 12.6V at 2Ohm: n/a Bridge Power at 12.6V at 4Ohm: 2 x 600 W rms Frequency Response: 5Hz to 22kHz Crossover: lp / hp: 80Hz 12dB/8 Damping Factor: 200 Maximum Consumption: 116A Product dimensions (LxWxH): 17.0 X 13.6 X 5.5 cm Weight: 1.12kg