Audio Research LS27 -Natural Finish **Trade In**

Audio
Research LS27

LINE-STAGE
PREAMPLIFIER

TECHNICAL SPECIFICATION

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%.

NOISE
1.3uV RMS residual
IHF weighted balanced equivalent input noise with volume at 1 (100 dB
below 2V RMS output).
 
TUBE COMPLEMENT
2-6H30
dual triode. (Hybrid JFET/tube audio circuit, solid-state power
supply).

POWER REQUIREMENTS
105-130VAC
60Hz (210-260VAC 50/60Hz) 50 watts maximum.

DIMENSIONS
19"
(48 cm) W x 5.25"(13.4 cm) H (standard rack panel) x 13.3"(33.8
cm) D. Handles extend 1.50" (3.8 cm) forward of the front
panel.

WEIGHT
16.3 lbs. (7.4 kg) Net; 23
lbs. (10.5 kg) Shipping.