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ARCDB
https://arcdb.ws/SP3/SP3.html
sp-3b (1978) SP-3C (2001) Audio Research has the reputation for the best product support in the industry, which includes service for products that date back to the beginning of the high-end industry and to the founding of our company over 30 years ago.
Audio Research SP-3B Test #001 - YouTube
https://www.youtube.com/watch?v=VSXmG2UOvG8
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Audiogon Discussion Forum
https://forum.audiogon.com/discussions/melody-pure-black-101-line-preamp
The legendarily phantom SP-3B was an upgrade offered by Audio Research in 1978, to put most of the advances in design present in the then-new SP-6 into the SP-3, 3a and 3a-1 circuit. I encountered just one in-the-metal in 1979, and have never seen one since.
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.
Audio Research LS3 Preamplifiers user reviews : 4.6 out of ...
http://www.audioreview.com/product/amplification/preamplifiers/audio-research/ls3.html
The audio Research LS3 B has deep sound that focuses on vocals,and head lining instuments with out living behine dinamics, bass, treble. you will find parts of music not heard before a unique style of sound smood aggressiveness. Adele,sting,andrea bocelli, bob marley tested. Emotiva xpr2 Amp,Xd1dac,Erc2 cd.
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).
Audio Research SP10, SP8, and SP15 - Bambi B - Amp/Preamp ...
https://www.audioasylum.com/messages/amp/122549/audio-research-sp10-sp8-and-sp15
Audio Research SP10, SP8, and SP15 Posted by Bambi B (A ) on October 15, 2007 at 16:40:30 In Reply to: Buy an Audio research SP10 - SP15? posted by …
Audio Research SP-3 preamplifier – Old School | TONEAudio ...
https://www.tonepublications.com/old-school/audio-research-sp-3-preamplifier/
Audio Research SP-3 preamplifier. Back in the mid 1970s, the idea that a preamplifier could provide “straight wire with gain” was an elusive goal. The idea that such perfection could be achieved from a valve model seemed even more unlikely. Yet when the $595 SP-3 preamplifier arrived on the scene in 1972, many audio reviewers proclaimed that such perfection was well …
Audio Research SP-3 | Tube | Beverly Hills, California ...
https://www.audiogon.com/listings/lisaf773-audio-research-sp-3-tube
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. It is no longer possible to obtain the high voltage (525WVDC) electrolytic capacitors used in the original ...
REV. B audio research
https://audioresearch.com/wp-content/uploads/2021/08/SP5_Manual.pdf
The following optional (*) accessories for your SP-5 preamplifier will be made available through your Audio Research dealer: * Walnut veneered oiled finish cabinet * Programable low level head amp electronics LINE VOLTAGE CONVERSION This equipment can be operated from either 120 Volts or 240 Volts A.C., 50/60 Hz.
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