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Audio Research SP-10 preamplifier | Stereophile.com
https://www.stereophile.com/tubepreamps/audio_research_sp-10_preamplifier/index.html
This brings me to the units under review: the Conrad-Johnson H-la head amp and Premier Three preamp combination and the Audio Research SP …
Audio Research SP-10 Clone HELP please | diyAudio
https://www.diyaudio.com/community/threads/audio-research-sp-10-clone-help-please.210222/
Audio Research SP-10 Clone HELP please. First I would like to say that this preamp will surely sound really good since it already does even with the issue I'm having... I built this preamp about 2 years ago since I wanted to familiarize myself with tubes. Had a couple hiccups and made everything work but a humming sound was there and I don't ...
Audio Research SP10, SP8, and SP15 - Bambi B - Amp/Preamp ...
https://www.audioasylum.com/messages/amp/122549/audio-research-sp10-sp8-and-sp15
The SP10 phono gain of 74dB is among the highest and the tubes must be very quiet, non-microphonic, and very strong to take the higher current. Today, only the most rugged E88CC and NOS E188CC will survive well.
Audiogon Discussion Forum
https://forum.audiogon.com/discussions/audio-research-ref-1-vs-sp10-mkii-preamp
The sp10 mk2 is so good you cannot belive the magic of the project given to the audio community by the late Mr Johnson. Needless to say, heavy mods are required: ps changed from electrolytics to full polyprops, this mod requires lifting of the entire ps chassis.
Audio Research SP-10 | Tube | Audiogon
https://www.audiogon.com/listings/lisaeiai-audio-research-sp-10-tube
Audio Research SP-10 for sale. Original true audiophile owner. Enjoyed sparingly in a clean laboratory-like listening room with other high-end gear. Pristine condition. Dust-free. Smoke-free. Pet-free. Main/preamp chassis has fo...
A Tune-up for the Audio Research SP-4/4A ... - Conrad Hoffman
http://conradhoffman.com/SP4A_caps.htm
A Tune-up for the Audio Research SP-4/4A Preamp. Introduction. The ARC SP-4 preamp was ARCs first solid state preamp. It was controversial at the time and some say it almost destroyed the company. Opinions about the sound quality are all over the map but based on dealer comments and my listening, it wasn't exactly world class.
Audio Research SP6 Tube Preamp - Kevin O
http://kevin.kevino.org/tubes/sp6.shtml
Modified Audio Research SP6 Tube Preamp. In July, 2002 I picked up a 1978 Audio Research SP6 preamp. Here is a photo from the original Ebay ad where I found and bid on it. The unit was in very good condition but badly in need of repair. This preamp had an above average power supply with 11 large twist-lok can capacitors.
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