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Audio Research SP-11 preamplifier | Stereophile.com
https://www.stereophile.com/tubepreamps/898/index.html
The SP-11 is a design departure for Audio Research. Like the Berning TF-10, it is neither a tube nor a solid-state preamp; rather, it is both at once. Each active stage is a combination of a triode tube and a FET—devices whose dynamic transfer (input/output) characteristics just happen to be very close to complementary.
Audio Research SP-11 preamplifier – Old School | TONEAudio ...
https://www.tonepublications.com/old-school/audio-research-sp-11-preamplifier/
Audio Research SP-11 preamplifier. Residing at the top of the heap for at least three decades, Audio Research Corporation preamplifiers are almost default purchases for certain types of tube lovers. ARC preamps are adventurous in their technology yet conservative in execution, so they appeal to audiophiles who like to minimize risks.
Audio Research SP11 MKII Preamplifiers user reviews : 5 ...
http://www.audioreview.com/product/amplification/preamplifiers/audio-research/sp11-mkii.html
The most important thing is to have the right match of your amp and preamp. preamp: Audio Research SP-11 MK II pwr amp: McIntosh MC240 interconnect: Audio Note VZ NBS King Serpent II Speaker wire: NBS Master Speaker: ATC SCM 10 …
Audio Research SP-11 preamplifier Page 2 | …
https://www.stereophile.com/content/audio-research-sp-11-preamplifier-page-2
The Audio Research SP-11 is an incredible preamplifier, very probably the best preamp that any amount of money can buy today. If it does not sound as musical on some loudspeakers currently in my house than some other preamps I have, I am willing to blame that on the loudspeakers and look for other ones.
Audio Research SP-11 MK2 ... - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/audio-research-sp-11-mk2
I've worked on both the SP-11 and the SP-10 extensively. The SP-11 is probably a bit quieter in the phono stage then the SP-10. Both are marvelous preamps. Both bench test very well. Before comparing a new preamp with a rather old preamp one would have to recap the old preamp. That way you are comparing apples to apples.
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