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Audio Research SP9 preamplifier Guy Lemcoe SP9 Mk.II 12/90 ...
https://www.stereophile.com/content/audio-research-sp9-preamplifier-guy-lemcoe-sp9-mkii-1290#:~:text=The%20SP9%20Mk.II%20looks%20a%20lot%20like%20its,panel%20is%20not%20easily%20legible%20in%20dim%20light.
Audio Research SP9 MKII. Vs SP-14 - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/audio-research-sp9-mkii-vs-sp-14
Audiogon Discussion Forum. Edit. Audio Research SP9 MKII. Vs SP-14. Would like to get your advice on this decision Found the above to audio research preamps, for sale at approximately the same price. I will be listening a lot to final as well as CDs. Any advice you can give me on this decision would be appreciated thank you.
Audio Research SP14 preamplifier | Stereophile.com
https://www.stereophile.com/content/audio-research-sp14-preamplifier
Retailing for $1200 more than the SP9 Mk.II and just half of the SP15's $5995, it occupies an increasingly volatile market niche, with strong competition from both this country and abroad. The SP14 is a hybrid design, and follows in the tradition of the SP9 Mk.II in using one 6DJ8 dual-triode vacuum tube in an intermediate gain stage of the phono section.
Audio Research SP9 preamplifier Guy Lemcoe SP9 Mk.II …
https://www.stereophile.com/content/audio-research-sp9-preamplifier-guy-lemcoe-sp9-mkii-1290
The hybrid SP9 Mk.II uses two 6DJ8 tubes, one in the phono stage and one in the line section, each ringed with tube dampers, like the solitary 6DJ8 in the ARC SP14. The SP9 Mk.II is a revision of the original SP9 introduced in the Summer of 1987, embodying what Audio Research calls a group of 14 different improvements. J.
Audio Research SP9 preamplifier | Stereophile.com
https://www.stereophile.com/tubepreamps/739/index.html
Audio Research SP9 preamplifier. Following the introduction of their very expensive, tube/FET hybrid SP11 preamplifier, there were rumors that Audio Research was working on a hybrid tube/transistor preamplifier targeted to cost less than $2000. The rumors were confirmed when ARC showed a black-and-white photo of the SP9 at the 1987 Winter CES.
Audio Research SP-9 Preamplifier – Old School | TONEAudio ...
https://www.tonepublications.com/old-school/audio-research-sp-9-preamplifier/
The Audio Research SP-9 redefined the term “bullet-proof.”. While previous all-tube models often encountered noise, channel imbalance, hiss and distortion, this new hybrid design was dead quiet, linear, and most of all, musical. The SP-9 hit retailer’s shelves in 1987 with an MSRP of $1,695 and offered tremendous value.
Audio Research SP14 Preamplifiers user reviews : 4.2 out ...
http://www.audioreview.com/product/amplification/preamplifiers/audio-research/sp14.html
Audio Research SP14 Preamplifiers. Very transparent phono stage, all records comes to life. (switching from Yamaha cx preamp) Built like a tank, it's amazing that a 25+ yr equipment still runs & looks new, solid parts/materials being used. Easy maintenance, won't break your bank for tube rolling as it only uses 1 tube.
Audio Research SP-9 | Tube | Audiogon
https://www.audiogon.com/listings/lis9i68j-audio-research-sp-9-tube
Audio Research SP-9 trade in --sounds great and looks great Audio Research SP9 preamplifier J. Gordon Holt, Various | Nov 29, 1995 | First Published: Nov 29, 1987 Following the introduction of their very expensive, tube/FET hybrid SP11 preamplifier, there were rumors that Audio Research was working on a hybrid tube/transistor preamplifier targeted to cost less than $2000.
ARCDB
https://arcdb.ws/SP9/SP9.html
The Audio Research Database (ARCDB) provides information about past and present products from ARC (Audio Research Corporation) ... Technically, the Mark II version of the SP9 preamplifier includes a group of 14 different improvements, utilizing 61 component and wire changes. These combine to provide enhanced reliability and flexibility, in ...
Audio Research SP9 MKII Preamplifiers user reviews : 4.6 ...
http://www.audioreview.com/product/amplification/preamplifiers/audio-research/sp9-mkii.html
The preamplifier has kept up with the continuing improvemenst in the rest of the system. The SP 9 mk II is a sensible choice, especially given the low prices on the 2nd (or 3rd) hand market. NAD 1020, Copland 301, Music Reference RM 5, ARC LS2B, ARC LS3B, QUAD 405-2, Futtermann OTL amplifier, ARC VT 100 mkII.
Detailed History of Audio — Darlington Labs
https://www.darlingtonlabs.com/audio-history
1990 – Audio Research releases the SP-14 preamplifier. This hybrid design is similar to the SP9 Mk.II with one 6DJ8 dual-triode vacuum tube in the second gain stage of the phono section. The line section is all-FET, using a circuit similar to that in …
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