Parasound HALO A51 5x250W Power Amp

 Continuous power output:
        250W RMS x 5, 20 Hz - 20 kHz, 8 Ω, all channels driven
        400W RMS x 5, 20 Hz - 20 kHz, 4 Ω, all channels driven

Current capacity:  60 amperes peak per channel
Power bandwidth: 5 Hz - 100 kHz, 0/-3 dB at 1 watt
Total harmonic distortion:  < 0.2 % at full power
IM distortion: balanced 16 V rms  < 0.04 %
Slew rate:  > 130 V/µsecond
Dynamic headroom:  > 1.5 dB
Interchannel crosstalk:   > 78 dB at 1 kHz;
                                   > 63 dB at 20 kHz
Input sensitivity:  1 V for 28.28 V, THX Reference Lev
Input impedance:   47 k Ω unbalanced; 94 k Ω balanced
S/N ratio:  112 dB, input shorted, IHF A-weighted
Damping factor:  > 1100 at 20 Hz

Voltage:  110V - 240V
Dimensions:  17-1/4" w x 7-5/8" h x 20" d, 7" h without feet
Net weight: 80 lb.