What are the specs for the Audio Research LS3?

Frequency Response:

±.5 dB, 2.0 Hz to 100 kHz. -3dB points below 1 Hz and above 200 kHz

Distortion:

Less than .01% at 2V RMS output. (Typically less than .005% in midband)

Noise & Hum:

18 µV RMS maximum IHF weighted noise at main output with gain control minimum (more than 100 dB below 2V RMS output, or 4V balanced output (LS3B))

Gain:

Main output: 18 dB (optional 10 dB gain reduction) Tape output: 0 dB Balanced output (LS3B): 24 dB

Input Impedance:

50 kOhms (100 kOhms Direct)

Output Impedance:

250 Ohms main output. 500 Ohms balanced (LS3B). Recommended load 60K Ohms and 100 pF (20K ohms minimum and 1000 pF maximum)

Output Polarity:

-

Maximum Inputs:

20V maximum

Rated Outputs:

2V RMS 2 Hz to 100 kHz, all outputs, 60K ohm load (maximum output 35V RMS (70V RMS balanced) (LS3B) at 1/2% THD at 1 kHz into 100K ohms)

Power Supplies:

Electronically-regulated low and high voltage supplies. Line regulation better than .01%.

Power Requirements:

100-135VAC 60 Hz (200-270VAC 50/60 Hz) 25 Watts maximum (35 Watts maximum LS3B)

Dimensions:

19" (48 cm) W x 5 ¼" (13.4 cm) H (standard rack panel) x 10 ¼" (26 cm) D. Handles extend 1 ⅝" (4.1 cm) forward of front panel. Rear chassis fittings extend ½" (1.3 cm)

Weight:

LS3: 11 lbs. (5.0 kg) Net; 20 lbs.(9.0 kg) Shipping. LS3B: 12 lbs. (5.5 kg) Net; 21 lbs.(9.5 kg) Shipping.