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Audio Research SP-8 All Tube Preamp with Phono Input ...

    https://skyfiaudio.com/products/audio-research-sp-8-all-tube-preamp-with-phono-input-fully-tested
    Audio Research SP-8 All Tube Preamp with Phono Input - Fully Tested $0 All tube preamp from the best era of ARC - working and sounding perfect. Some cosmetic imperfections (see photos) but very presentable overall. Click herefor a PDF …

Tubes Asylum: REVIEW: Audio Research, Inc. SP8 ...

    https://www.audioasylum.com/reviews/Preamplifier-Tube/Audio-Research-Inc./SP8/tubes/98687.html
    Audio Research SP8 MkII ; Sources (CDP/Turntable): Denon DN-C680 CDP, VPI Jr/AQ PT9+/Shure V15 Type VxMR ; Speakers: Monitor Audio Gold Reference 60 ; Cables/Interconnects: Audio Magic, Audiotruth, Harmonic Tech ; Music Used (Genre/Selections): Basically classical and jazz ; Room Size (LxWxH): 12.5 x 17 x 8-10 ; Room Comments/Treatments: none

SP8 Manual Schem - ARCDB

    https://www.arcdb.ws/Database/SP8/ARC_SP8_manual.pdf
    SUMMARY OF SP-8 FEATURES As expected with a product of this caliber, to the audiophile perfectionist. the SP-8 offers many outstanding features AUTOMATIC MUTING: A two-minute warmup timer insures muting of undesirable subsonic No troubl esome relays or electrical contacts output during circuit stabilization.

Why is the Audio Research SP8 so highly regarded?

    https://forum.audiogon.com/discussions/why-is-the-audio-research-sp8-so-highly-regarded
    Why is the Audio Research SP8 so highly regarded? I have a MRk II SP8 that was modified by Steve Huntley when he was at Great Northern Sound. I don't use the phono section anymore as I have acquired a ARC PH7 so the SP8 is now simply used as a line stage preamp.

Audio Research SP 8 MKII Preamplifiers user reviews : 5 ...

    http://www.audioreview.com/product/amplification/preamplifiers/audio-research/sp-8-mkii.html
    Now, with the sp-8 in place, that thing is running 8-10 hours a day. When either of us get home, the first thing we do is turn the power on to warm up the preamp. I could go into detail regarding background, soundstage, harmonics, resolution. It's got it all in spades. The funny thing is, my other preamps did too.

ARCDB

    https://www.arcdb.ws/model/SP8
    The Audio Research Database (ARCDB) provides information about past and present products from ARC (Audio Research Corporation) Home. Literature. Museum. Patents. SP-8. Description [ No data found ] Revisions. SP-8 Rev 1. SP-8 Rev 2. SP-8 Rev 3. SP-8 Rev 4 (1983) SP-8 Rev 5 (1983) SP-8 Rev 6. SP-8 Rev 7 (1985) ...

Audio Research SP10, SP8, and SP15 - Bambi B - Amp/Preamp ...

    https://www.audioasylum.com/messages/amp/122549/audio-research-sp10-sp8-and-sp15
    The SP8 is a "friendlier" sound, a bit more liquid and sweeter. I would recommend anyone serious about phono reproduction to have an SP10- but with the warning that the tubes must be very, very good. 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.

Audio Research SP8 vs. Rogue Ninety Nine? | The Emotiva Lounge

    https://emotivalounge.proboards.com/thread/41056/audio-research-sp8-rogue
    The SP-8 made, guitars stand out, pianos sing. Music listen to was John Abercrombie and Ralph Towner- Sargasso Sea, Tina Brooks- True Blue, Kenny Burrell-Midnight Blue, Melody Gardot-Absence, Alexander O'Neal-Hearsay, Donnell Jones-Journey of a Gemini and Cassandra Wilson-New Moon Daughter, the Beatles-Abbey Road.

Audio Research LS8 line preamplifier | Stereophile.com

    https://www.stereophile.com/content/audio-research-ls8-line-preamplifier
    One such product was the all-triode SP8 preamplifier from Audio Research, launched back in 1982 and priced at $1400. This classically tasteful preamplifier came equipped with a medium-sensitivity phono equalizer and the usual tape and line inputs.

Tube Preamp Reviews - Stereophile.com

    https://www.stereophile.com/taxonomy/term-a/137
    One such product was the all-triode SP8 preamplifier from Audio Research, launched back in 1982 and priced at $1400. This classically tasteful preamplifier came equipped with a medium-sensitivity phono equalizer and the usual tape and line inputs.

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