Audio Research LS28 preamplifier

Selling my preamplifier since I’m downsizing my system. It is in great condition as it can be seen on pictures. I’m the second owner of this beautiful device. There is a ton of very positive reviews related to this device. I’m selling it with original box, documents and the remote, so it is a complete package. Buyer can choose between 3 sets of tubes. Sovtek 6H30P (700hours), Nevz 6N6P(40hours) or special red dot 6N6P(40hours).
If You have any questions please feel free to contact me.


Official details are:

FREQUENCY RESPONSE
+0-3dB, 0.4Hz to 200kHz at rated output (Balanced, 200k ohms load)
DISTORTION (THD)
Less than .007% at 2V RMS BAL output
NOISE & HUM
Less than -100 dBv at maximum volume (103).
GAIN
Main output: 18.5dB Balanced output, 12.5dB SE output. Record out: 0dB (Processor input: 0dB BAL output).
INPUT IMPEDANCE
100K ohms Balanced, 50K ohms SE. Inputs: 4 balanced, 4 single-ended. Assignable processor passthrough.
OUTPUT IMPEDANCE
600 ohms Balanced, 300 ohms SE Main (2). 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 main, 1 record out (XLR and RCA connectors).
OUTPUT POLARITY
Non-inverting
MAXIMUM INPUTS
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).
POWER SUPPLIES
Electronically regulated low and high voltage supplies. Automatic 45 sec. warm-up/ brown-out mute. Line regulation better than .01%.
TUBE COMPLEMENT
(4) 6H30P
POWER REQUIREMENTS
100-125VAC 60Hz (200-250VAC 50/60Hz) 130 watts. Standby: 2 watts.
OTHER
Dynamic Range: >122 dB (AES17). Crosstalk: -105dB or better at 1kHz. Controls: Rotary encoders: Volume (103 steps), Select Input. Push Buttons: Power, Menu, Enter, Mono, Invert, Mute.
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
15.9 lbs. (7.2 kg) Net; 24 lbs. (10.9 kg) Shipping