Frequency response ±.5dB, 1.0Hz to 100kHz -3dB pionts below 0.2Hz and 400kHz
Distortion (THD) Less than .01% at 2V RMS output
Noise & hum 14µV RMS residual IHF weighted balanced noise output with gain control at minimum (103dB below 2V RMS output).
Gain Main Output: Selectable for each input: 18db, 12dB, 6dB Balanced output. (12dB, 6dB, 0dB SE output)
Record output: 0dB
Input impedance 120K ohms Balanced, 60K ohms SE. Inputs (8): Tuner, Phono, CD, Video, Aux 1, Aux 2, Monitor, Processor (XLR and RCA connectors)
Output impedance 650 ohms Balanced, 325 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3: 2 Main, 1 Record (XLR and RCA connectors)
Output polarity
Maximum inputs 28V maximum, BAL, 14V maximum SE (6dB gain)
Rated outputs 2V RMS 1Hz to 100kHz into 200K ohm balanced load (maximum balanced output capability is 40V RMS at less than 0.5% THD at 1kHz).
Power supplies Electronically-regulated low and high voltage supplies. Automatic 40 sec. warm-up/brown-out mute. Line regulation better than .01%.
Tube complement LS25: (4) 6922/E88cc dual triode
LS25 MKII: (2) 6H30 dual triode
Power requirements 100-135VAC 60Hz (200-270VAC 50/60Hz) 45 watts maximum
Other Controls: Volume (104 steps), Gain, Balance, Input. Toggle switches: Power On/Off, Stereo/Mono, Bal In/SE In, Processor/Input, Monitor/Input, Mute/Operate.
Dimensions 19" (48 cm) W x 5.25" (13.4 cm) H (standard rack panel) x 11.75" (29.8 cm) D Handles extend 1.50" (3.8 cm) forward of front panel.
Weight 18 lbs. (8.2 kg) Net; 28 lbs. (12.7 kg) Shipping.