Audio ResearchLS-12usedAudio Research LS-12PRICE DROP!This preamp is in good working order, and the sound is very refined. High volumes can be played with little distortion. I am selling to make money for a deposit on another item. Kept in ...1600.00

Audio Research LS-12

Listing ID: lis8g4j2 Classified 
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Condition
8/10
Payment methods
Ships fromLongview, TX, 75605
Ships toUnited States
Package dimensions23.0" × 18.0" × 10.0" (31.0 lbs.)
Shipping carriersUPS or FedEx
Shipping cost
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Original accessoriesRemote Control, Box, Manual
AverageResearch Pricing

PRICE DROP!

This preamp is in good working order, and the sound is very refined. High volumes can be played with little distortion. I am selling to make money for a deposit on another item. Kept in smoke free environment. I'm sure you will enjoy it. I WILL PAY SHIPPING FOR FULL PRICE OFFER.

Here's the details from the Audio Research website:

Audio Research LS-12 Balance Line State
Preamplifier





Building on our thirty year tradition of designing electronics of
the highest quality and value, Audio Research is pleased and very
excited to introduce the LS12 stereo preamplifier, which bridges the
usual gulf between solid-state and vacuum-tube sound, sonically
outperforming the competition anywhere near its retail price.


The LS12 represents a major advance in solid-state circuit design
in a non-stratospheric price range. Several circuit details and
refinements have been implemented for the first time, with many
others derived from more expensive siblings.


Physically and operationally the LS12 is identical to the LS16,
with the same full-sized chassis and array of balanced and
single-ended inputs and outputs. The LS12 uses the same
microprocessor controls as the LS16 and LS25, including a 104 step
volume control and bidirectional spring-loaded switches. There is
also a single-ended, unity-gain processor pass-through, allowing the
LS12 to be easily incorporated in a home theater system while
preserving high quality two-channel music playback.


The fully-balanced, double-differential design is pure Class-A,
utilizing all-FET circuits with unity-gain buffers between stages and
a double-buffered output. Low-noise, critically matched high
transconductance JFETs are used for all audio circuits, with local
FET constant-current stabilization for each stage. The audio circuit
is DC coupled throughout, with servo stabilization for low offset and
subsonic control. Full muting protection is included for warmup
stabilization and low-line voltage. Total gain is 18 dB balanced
output, 12 dB via single-ended outputs.


The LS12's advanced-design power supplies use soft recovery
rectifiers, highest grade "Muse" filter capacitors with our
patented DEC (Decoupled Electrolytic Capacitor®) choke-decoupling,
and a total of seven regulators. Mechanical vibration is carefully
controlled with special Isodamp mounting for the power transformer
and its own circuit board. Isodamp feet are used for the chassis.
Like other Audio Research preamps, the LS12 has a removable IEC power
cord, and it comes with the same remote control as the one supplied
with the LS16.


All you really have to do is listen to the LS12 to appreciate what
an outstanding value it provides. The LS12's sonics are remarkable
from top to bottom, with startling transparency, resolution, dynamics
and bass impact, speed, and control. The only blurring is the line
between tube and solid-state sound: the LS12 presents soundstaging
and "air" at which other solid-state preamps only hint.


Frequency response:  ± 1dB, 0.1Hz to 40kHz at rated output. -3dB points below 0.06Hz
and above 70kHz


Distortion (THD): .01% at 2V RMS Balanced output


Noise & hum: 40µV RMS residual IHF-A weighted Balanced noise output with gain
control at minimum (94dB below 2V RMS output)


Gain: Main output: 18dB Balanced 12dB Single Ended output


Input impedance: 150K ohms Balanced. 75K ohms SE. Inputs (7): AUX SE, PHONO, TUNER,
CD BAL, AUX BAL, MONITOR (SE), and PROCESSOR (SE).


Output impedance: 400 ohms Balanced, 200 ohms SE main, 10K ohms minimum load and
5000pF maximum capacitance. Outputs (4): 2 Main Bal, 1 Main SE, 1
Record SE.


Output polarity: Non inverting


Maximum inputs: 14V RMS maximum Balanced, (7V RMS SE)


Rated outputs: 2V RMS (1V RMS SE) into 200K ohm. Balanced load (maximum Balanced
output capability is 12V RMS at 1% THD at 1kHz).


Power supplies:  Electronically regulated low and high voltage supplies. Automatic
45 sec. warmup mute. Automatic brown-out mute.


Power requirements: 100-135VAC 60Hz (200-270VAC 50/60Hz) 35 watts maximum.


Other: Controls: Volume (104 steps), Input Select. Toggle switches: Power
On/Off, Operate/Mute, Monitor/Input, Processor/Input. All functions
on Remote Control.


Dimensions: 19" (48 cm) W x 5.25" (13.3 cm) H (standard rack panel)
x 10.5" (26.7 cm) D. Handles extend 1.50" (3.8 cm) forward
of the front panel.


Weight: 11.5 lbs. (5.2 kg) Net; 21 lbs. (9.5 kg) Shipping.

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