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Audio Research LS28SE Line-Stage Preamplifier

AED 28,500

Dubai

5.0

26 items live

Item Details

Age

6-12 months

Condition

A bit of wear and tear, but in good working condition

Warranty

No

Usage

Out of original packaging, but only used once

Posted on: 7th August 2026

Description

I'm selling my Audio Research LS28SE line-stage preamplifier. I bought it about 6–12 months ago and it has been used once, so it's in good condition with no warranty. The unit is fully functional, powers on, and all controls, inputs and outputs work as expected. Cosmetic condition is clean with minor handling marks that are not noticeable from normal use. Includes the preamp only (no remote or extra cables). Located in UAE — available for inspection and pickup. Price is for the unit as shown.
A high-end preamplifier in its technical performance. An instrument in its ability to deliver a realistic and emotional connection to the music.
The LS28SE draws on Audio Research’s experience creating, of all things, our Reference 160-series power amplifiers. Numerous costly component upgrades elevate the LS28SE’s clarity, resolution, transient snap, and sense of space. The relaxed purity and natural sense of balance are instantly noticeable and will inspire extended listening sessions.

Product specifications:
- Model: Audio Research LS28SE
- Category: Electronics > Amplifiers (Line preamplifier)
- Age: 6-12 months
- Condition: Good
- Usage: Used once
- Warranty: No

Frequency Response

+0-3dB, 0.4Hz to 200kHz at rated output
(Balanced, 200k ohms load)

THD+Noise

Less than .007% at 2V RMS BAL output

Noise

Less than -100dBv at max volume (103)

Dynamic Range

122dB (AES17)

Crosstalk

-105dB

Gain

Main output: 18.5dB balanced output.
(12.5dB SE output.) Record output: 0dB (Processor input: 0dB balanced out).

Input Impedance

100K ohms Balanced, 50K ohms SE.
8 Inputs – 4 balanced, 4 single-ended.

Output Impedance

600 ohms Balanced, 300 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 Main, 1 Record (XLR and RCA connectors).

Output Polarity

Non-inverting

Maximum Input

16V RMS BAL, 8V RMS SE

Rated Outputs

2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 17V RMS at less than 0.5% THD at 1kHz).

Controls

Rotary volume selector (103 steps) and rotary input selector. Push buttons: Power, Menu, Enter, Mono, Invert, Mute.

Power Supplies

Electronically regulated low and high voltage supplies. Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%.

Tube Compliment

(4) 6H30P dual triode

Power Requirements

105-125VAC 60Hz (200-250VAC 50/60Hz) 130 watts maximum

Standby

2W

Dimensions

Width: 19” (48 cm)

Height: 6.5” (13.7 cm)

Depth: 13.7” (34.8 cm)

Handles extend 1.6” (4 cm) forward of the front panel

Weight: 16.0 lbs. (7.2 kg) Net; 24 lbs. (10.9 kg) Shipping