Audio Research - LS2 Tube preamplifier
02
days
16
hours
09
minutes
12
seconds
Current bid
€ 900
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Expert
Selected by Ariel Cabello
Holds dual bachelor's degrees in electronics and physics with 20 years in audio engineering.
Estimate € 1,700 - € 1,900
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| Bidder 0819 | €900 | |
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| Bidder 0819 | €850 | |
 Bidder 0191 | €800 | |
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Audio Research LS2 hybrid line preamplifier from 1991, in near‑mint condition after a service, tested and working, with original box, connecting cable, user manual and brochures, dimensions 480 × 134 × 260 mm and weight 5.9 kg.
AI-assisted summary
Description from the seller
The Audio Research LS2 is a hybrid preamplifier (vacuum tube and transistor combined) with FET circuits, characterized by a very musical, smooth, delicate, subtle, clear sound, with transparent sound detail that is addictive!
This device has just undergone a revision and cleaning with replacement of the valve (which has not yet reached 30 hours of operation). I would say it is 'like new' despite its age.
When the LS2 was designed, Audio Research engineers received a simple mission: to create the best line preamplifier ever! The result was, notably, very successful!
Your design is an approximation of the theoretical ideal of 'a straight wire with gain.' The LS2 maintains the purest form of the signal, offering only the most essential control functions: a volume regulator (4 sections and 41 positions) and an input selector switch with gold-plated contacts.
For maximum sound fidelity, there is the option of Direct Gain – a separate set of inputs that directs the source signal directly to the volume control and then to the gain stage.
In addition, it features conventional RCA inputs for tape player, tuner, CD, video, and auxiliary.
It features two balanced outputs, one conventional output for connection to the amplifier and another recording (tape) output, both in RCA.
The additional controls include the mute function (complementing a sophisticated automatic cut-off circuit) and deactivatable tape outputs, used to prevent undesirable loading effects when some tape recorders are connected to the outputs.
Like other preamplifiers and line stages from Audio Research, the LS2 is a true Class A circuit capable of delivering 50 volts (peak-to-peak). It offers 18dB of total gain – perfect for current line-level sources and ideal for use with a turntable preamplifier.
Technical specifications
Response frequency: 0.1Hz to 300kHz
Total harmonic distortion: 0.01%
Signal-to-noise ratio: 100dB (line)
Output: 2V (pre-out)
Valve complement: 1 x 6DJ8/ECC88
Dimensions (width x height x depth): 480 x 134 x 260mm
Weight: 5.9kg
Year of release: 1991
The high-standard construction and the quality of the parts are very high.
The Audio Research LS2 is a hybrid preamplifier (vacuum tube and transistor combined) with FET circuits, characterized by a very musical, smooth, delicate, subtle, clear sound, with transparent sound detail that is addictive!
This device has just undergone a revision and cleaning with replacement of the valve (which has not yet reached 30 hours of operation). I would say it is 'like new' despite its age.
When the LS2 was designed, Audio Research engineers received a simple mission: to create the best line preamplifier ever! The result was, notably, very successful!
Your design is an approximation of the theoretical ideal of 'a straight wire with gain.' The LS2 maintains the purest form of the signal, offering only the most essential control functions: a volume regulator (4 sections and 41 positions) and an input selector switch with gold-plated contacts.
For maximum sound fidelity, there is the option of Direct Gain – a separate set of inputs that directs the source signal directly to the volume control and then to the gain stage.
In addition, it features conventional RCA inputs for tape player, tuner, CD, video, and auxiliary.
It features two balanced outputs, one conventional output for connection to the amplifier and another recording (tape) output, both in RCA.
The additional controls include the mute function (complementing a sophisticated automatic cut-off circuit) and deactivatable tape outputs, used to prevent undesirable loading effects when some tape recorders are connected to the outputs.
Like other preamplifiers and line stages from Audio Research, the LS2 is a true Class A circuit capable of delivering 50 volts (peak-to-peak). It offers 18dB of total gain – perfect for current line-level sources and ideal for use with a turntable preamplifier.
Technical specifications
Response frequency: 0.1Hz to 300kHz
Total harmonic distortion: 0.01%
Signal-to-noise ratio: 100dB (line)
Output: 2V (pre-out)
Valve complement: 1 x 6DJ8/ECC88
Dimensions (width x height x depth): 480 x 134 x 260mm
Weight: 5.9kg
Year of release: 1991
The high-standard construction and the quality of the parts are very high.
Details
Era
1900-2000
Brand
Audio Research
Model
LS2
Multiple Models
No
Physical condition
Mint
Nr of items
1
Includes
Box, Brochures, Original user manual, Power cord
Year of Manufacturing
1991
Weight
5.9 kg
Functional condition
Tested and working/playable
Height
134 mm
Width
480 mm
Depth
260 mm
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