Sound Magus R1000.4 Specs:
  Input sensitivity: 0.3-3V
FR range: 5-90KHz
THD: <0.01%
S/N ratio: >115dB
Input Impedance: >20K
Minimum load: 2 Ohm
Operating Voltage: 7.5-16V
Recommended external fuse: 100A
4 ohm rate power: 4 x 150W
2 ohm rate power: 4 x 200W
4 ohm bridged power: 2 x 400W
Dimensions(LxWxH): 360 x 280 x48 mm.