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Audio Research SP-3, A, & A1 Modification Instructions
http://www.curcioaudio.com/SP-3%20Mod%20Documentation.pdf
Audio Research SP-3, A, & A1 Modification Instructions Page 1 I. Introduction This document describes a series of modifications for the Audio Research SP-3 preamplifier series that address the phono amplifier, line amplifier, and high voltage power supply. Once completed significant sonic improvements will be gained.
Free Audio Research Diagrams, Schematics, Service Manuals ...
https://www.schematicsunlimited.com/a/audio-research
Audio Research Diagrams, Schematics and Service Manuals - download for free! Including: arc cl30 schematic2 new , arcd76 new , arcd90 new , arsp3a new , arsp6c1 new , audio research classic30 power amplifier schematic, audio research classic 30 power supply schematic diagram, audio research d40 power amplifier, audio research d40 power amplifier schematic, audio …
Audio Research SP-3 preamplifier | Stereophile.com
https://www.stereophile.com/content/audio-research-sp-3-preamplifier
Preview, from Vol.3 No.3: We thought Audio Research's previous-model SP-2C (footnote 1) was excellent, but this is even better—the closest thing available, in fact, to the ideal straight wire with gain. Our sample had a minor glitch—there was a slight "plop" if you rotated the tone controls rapidly—but we could find nothing else about it to criticize. Currently, by far the …
ARCDB
https://arcdb.ws/SP3/SP3.html
The SP3 was introduced in 1972 and was instrumental in establishing Audio Research's world-wide reputation for sonic excellence. Several thousand were sold during the period of 1972-1976 and most, we believe, are still in service today.
AUDIO-RESEARCH SP3 PREAMPLIFIER SCH Service Manual ...
https://elektrotanya.com/audio-research_sp3_preamplifier_sch.zip/download.html
SP-3 SP3 SP AUDIO RESEARCH; If you have any question about repairing write your question to the Message board. For this no need registration. Please take a look at the below related repair forum topics. May be help you to repair.
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