audio research
LS1

Description
Hybrid tube/FET stereo line stage.

Introduced
1989

Discontinued
?

Revisions
-

Options
-

MSRP (US new retail)
$1,675

Specifications

Frequency response ± .5dB, 5 Hz to 50 kHz
Distortion (THD) < .01%
Noise & hum 100 dB below 1V RMS output
Gain Direct input to main output: 21 dB.
  CD input to main output: 11 dB.
  High level inputs to tape output: 0dB.
Input impedance 50K ohms (150K ohms CD, 100K ohms Direct).
Output impedance 250 ohms main output. Recommended load 60K ohms and 100pF. (20K ohms minimum and 1000pF maximum).
Output polarity  
Maximum inputs 20V
Rated outputs 2V RMS 5Hz to 50Hz, all outputs, 60K ohm load (main output capability is 50V RMS output at 1/2% THD at 1kHz into a 100K ohm load with 5V RMS input).
Power supplies Electronically-regulated low and high voltage supplies. Shielded toroid tranformer. Line regulation better than .01%.
Tube complement (1) 6922
Power requirements 100-135VAC 60Hz (200-270VAC 50/60Hz) 50 Watts maximum.
Other  
Dimensions 19” (48 cm) W x 5 1/4” (13.4 cm) H (standard rack panel) x 10 1” (26 cm) D. Handles extend 1 1” (3.8 cm) forward of the front panel. Rear chassis fittings extend 7/8” (2.3 cm).
Weight 20 lbs.

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