Audio Research Reference 610t (0 hours usage)

Manufacturer’s specs

Description
POWER OUTPUT
600 watts per channel continuous at 16 ohms from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 600 watts, below 0.05% at 1 watt. Approximate actual power available at “clipping”; 630 watts (1kHz). (Note that actual power output is dependent upon both line voltage and ‘condition’ i. e.: if power line has high distortion, maximum power will be affected adversely.)
POWER BANDWIDTH
(-3dB points) 15Hz to 150kHz
FREQUENCY RESPONSE
(-3dB points at 1 watt) 1Hz to 200 kHz
INPUT SENSITIVITY
4.2V RMS balanced for rated output. (24dB Gain into 8 ohms)
INPUT IMPEDANCE
200K ohms balanced
OUTPUT TAPS
4, 8, 16 ohms
POWER SUPPLY ENERGY STORAGE
Approximately 1000 joules
POWER REQUIREMENTS
105-125VAC 60Hz (210-250VAC 50Hz) 1700 watts at rated output, 2300 watts maximum, 800 watts at idle, 370 watts standby.
TUBE COMPLEMENT
(8 matched pairs) 6550C power output, (1) 6550C regulator, (1) 6H30 regulator amplifier, (2) 6L6GC driver, (2) 6NIP input, (1) 6H30 follower.
DIMENSIONS
13½” (343 mm) W x 23″ (584 mm) H x (20.8″ (528 mm) D. Handles extend 1½” (38 mm) forward and rearward.
WEIGHT
170 lbs. (77.2 kg) Net; Shipped in pairs, 395 lbs. (180 kg) per pair.