POWER OUTPUT: 450 watts into 8 ohms (550 watts per channel into 4 ohms), both channels driven, 1% THD. (700 watts into 4 ohms, one channel driven)
 

POWER BANDWIDTH: (-3dB Points) 5Hz to 45 kHz into 8 ohms.
 

INPUT SENSITIVITY: 2.9V RMS for rated output. (26dB Gain) single-ended or balanced.
 

INPUT IMPEDANCE: 150K ohms single-ended, 300k ohms balanced differential.
 

OUTPUT POLARITY: Non-inverting. Balanced pin 2+ (IEC-268).
 

OUTPUT REGULATION: 0.02dB 8 ohm load to open circuit (Damping factor 440).
 

HUM & NOISE: 300 microvolts RMS (105dB below rated output IHF A-weighted.)
 

POWER REQUIREMENTS: 100-125VAC 60Hz (200-250VAC 50 Hz) 950 watts at rated output (400WPC 8 ohms) 1300 watts at 500WPC 4 ohms, 1300 watts maximum. 55 watts idle.
 

DIMENSIONS: 19" (48 cm) W x 7" (17.8 cm) H x 18.4" (46.7 cm) D. Handles extend 1.5" (3.8 cm) forward. Output connectors extend 1.5"(3.8 cm) behind rear panel.
 

WEIGHT: 55.8 lbs. (25.4 kg) Net; 71 lbs. (32.3 kg) Shipping.