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Audio Research SD135 Stereo Power Amplifier; Silver ...
https://reverb.com/item/42534196-audio-research-sd135-stereo-power-amplifier-silver-upgraded-power-cable#:~:text=Product%20Specs%20%20%20Listed%20%20%206,%20%20Silver%20%201%20more%20rows%20
SD135 PDF Manual-3-07 - Audio Research
https://audioresearch.com/wp-content/uploads/2021/06/SD135_Manual.pdf
SD135 for On/Off control of the amplifier, or the 12V start-up trigger for remote installations. The AC power source for the SD135 amplifier should be capable of supplying 5 amperes for 100 or 120 volt units, or 3 amperes for 220 or 240 volt units. For …
ARCDB
https://arcdb.ws/SD135/SD135.html
Description. The SD135 is an entirely new amplifier for Audio Research involving a new mix of discrete devices within the framework of a pure analog, solid-state design. Like the larger HD220, the new SD135 ("SD" for "Silicon Drive") uses Thermal Trak® self-biasing output devices in a Class A-B design. And like the HD220, it accommodates either single-ended or balanced inputs.
Audio Research SD135 vs 100.2 - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/audio-research-sd135-vs-100-2
I have had both amplifiers and found the SD135 considerably smoother more natural sounding. Bass response has less boom. I switched to solid state from ARC tube amps a few years ago (most notably the 100.2), I have been much happier with the SD135. The 100.2 ran very hot, probably accounting for it's harsher tone.
Audio Research SD135 Stereo Power Amplifier; Silver ...
https://reverb.com/item/42534196-audio-research-sd135-stereo-power-amplifier-silver-upgraded-power-cable
MSRP: $4995. Other Notes: "The SD135 is an entirely new amplifier for Audio Research involving a new mix of discrete devices within the framework of a pure analog, solid-state design. Like the larger HD220, the new SD135 ("SD" for "Silicon Drive") uses Thermal Trak® self-biasing output devices in a Class A-B design.
Blown out Audio Research SD135 again - AudioShark
https://www.audioshark.org/amplifiers-8/blown-out-audio-research-sd135-again-16347.html
Blown out Audio Research SD135 again ! I purchased an old Audio Research SD135 amp around christmas. At the same time i picked up some rebuilt KEF107's. the amp is 10 years old, the speakers 20. When I connected it the sound was very staticky. I returned the amp and they replaced (12) tubes ?
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