Audio Research LS-27 Audio Research Tube Preamplifier

Sold with 2 sets of tubes and an upgraded Analysis Plus Power Cable.

SPECIFICATIONS

FREQUENCY RESPONSE: +0-3dB, 0.2Hz to 160kHz at rated output (Balanced, 200k ohms load)

DISTORTION: Less than .01% at 2V RMS BAL output.

GAIN: Main Output : Selectable for each input: 24dB, 18dB, 12dB Balanced output (18dB, 12dB, 6dB SE output). Record

output: 0dB (Processor input: 0dB balanced).

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: 700 ohms Balanced, 350 ohms SE Main (2). 20K ohms minimum load and 2000pF maximum

capacitance. Outputs (3): 2 Main, 1 Main, 1 Record (XLR and RCA connectors).

OUTPUT POLARITY: Non-inverting.

MAXIMUM INPUT: Low Gain: 48V RMS BAL, 24V RMS SE, Medium Gain: 24V RMS BAL, 12V RMS SE, High Gain: 12V RMS

BAL, 6V RMS SE.

RATED OUTPUTS: 2V RMS 1Hz to 100kHz into 200K ohm balanced load (maximum balanced output capability is 15V

RMS at less than 0.5% THD at 1kHz)

CONTROLS: Rotary volume selector (104 steps) and rotary input selector. Push buttons: Power, Mono, BAL/SE, Proc,

Monitor, Mute. Also remote buttons: Display, Bal L, Bal R, Hours, Invert, Gain.

POWER SUPPLIES: Electronically regulated low and high voltage supplies. Automatic 50 sec. warm-up/brown-out

mute. Line regulation better than .01%.

23.0" × 23.0" × 15.0" (27.0 lbs.)