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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
    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 with Targent stand CD player: Marantz CD 67-II SE Turntable: EMT 930-ST

stereonomono - Hi Fi Compendium: Audio Research SP11

    https://stereonomono.blogspot.com/2017/03/audio-research-sp11.html
    The SP11 is a hybrid unit, utilizing both vacuum tubes and FETs (Fiel Effect Transistors). It is not intended that this product should somehow continue the controversy of "vacuum tubes" vs. "solid-state". Rather, in keeping wit Audio Research's design philosophy of advancing the state-of-the-art., each type of device is used where it performs best.

ARCDB

    https://arcdb.ws/SP11/SP11.html
    SP-11 MKII Special Edition The Audio Research Database - ARCDB - is a tribute to Audio Research Corporation (ARC) for their tremendous contributions to the world of high end audio. About

Audio Research SP-11 Repaired and Restored - YouTube

    https://www.youtube.com/watch?v=PXGMF3wcWes
    For more information, please email [email protected] SP-11 has new signal Caps, New Power Supply Caps and numerous other burnt / melted parts r...

Audio Research SP11 MKII | Tube | Audiogon

    https://www.audiogon.com/listings/audio-research-sp11-mkii
    Audio Research SP11 used This is the SP11 MKII version. It is in two parts, the control center and separate power supply. This pre amp sold for an astounding $5995.00 back in 1987!!! Wow could you imagine what something li... 2900.00.

Buy an Audio Research SP10 MkII or an SP11 MkII

    https://forum.audiogon.com/discussions/buy-an-audio-research-sp10-mkii-or-an-sp11-mkii
    Audio Research D115 MkII *2 Kinergetics SW800 CAL Tempest MkII Oxford Crystal Reference Turntable with Airtangent and Koestsu Rosewood Signature Have fun. ... I owned an SP-10 and SP-11 too.I was not experienced enough at the time to really determine superiority of either unit.I did ultimately get an SP-15(I can hear the "HOOTS" from the tube ...

Audio Research – High-end audio equipment

    https://audioresearch.com/
    Audio Research continues its dedication to unparalleled musical expression and crafting components of the highest quality and lasting value for its customers. Our long-term dedication to service is peerless in this industry (Audio Research, with few exceptions, can repair anything ever produced during its entire history).

The Audio Research SP-11 - soundmovements.co.uk

    http://soundmovements.co.uk/diyaudio/SP11.html
    The SP-11 is one of the most complex and sophisticated preamplifiers ever released, built in two full-size rack-mount boxes with triple-regulated power supplies and three or four active devices (a 6DJ8 triode, a power MOSFET and one or two JFETs) in each amplifying stage. It appeared 1985, at the mid-point of Audio Research's experiments with hybrid circuit topologies, sitting between …

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