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AUDIO RESEARCH SP6a
https://www.audioantiquary.com/en-us/audio-research-sp6a/#:~:text=%E2%82%AC%201.300%2C00%20VAT%20included%20%20%20Product%20code,RESEARCH%20%20%20Availability%20%20%20no%20
AUDIO RESEARCH SP6a
https://www.audioantiquary.com/en-us/audio-research-sp6a/
The device is sold with 6 Russian production tubes. If you want to make a significant leap in quality we can install a sextet of ECC83 original NOS Telefunken selected and coupled by us visible in the photo gallery. The price of the pre SP6a refers to the original valves, if you want the upgrade to the German valves 800.00 euros must be added.
Audio Research SP6a DC on output | diyAudio
https://www.diyaudio.com/community/threads/audio-research-sp6a-dc-on-output.838/
HI I have recently bought an Audio Research SP6a preamp and very happy with it generally. There is however a problem with it when powering it on and off. It get a large amount of DC as the woofers make a very unnatural noise and the cones go forward for quite a few seconds and then gradually go...
Audio Research SP-6A
https://www.audiocircle.com/index.php?topic=166676.0
Audio Research SP-6A. « on: 8 Dec 2019, 03:09 am ». For sale is vintage Audio Research SP-6A. tube preamplifier. I had a few of those preamps over the years and this is the best of them. It is unusual in the sense that it must be a transition or experimental model from A to B series since it employs additional power regulations modules but ...
Audio Research SP-6a | Tube | Audiogon
https://www.audiogon.com/listings/lisa4h76-audio-research-sp-6a-tube
Audio Research SP-6a for sale. Selling my SP-6a. I have owned for about 20 years. Always used as a back-up when primary down for upgrades/repairs. Retubed about 10 years back. Ran continuously for last 24 hours. Sounded great wi...
Is Audio Research SP-6 considered a good model?
https://forum.audiogon.com/discussions/is-audio-research-sp-6-considered-a-good-model
I'm trying to decide on how to replace my Plinius 9200 with separates. I have a 70's era SP-6 and I'm wondering if it's worth servicing and keeping, or are there other tube pre amps (Audio Research or otherwise) worth looking for used (1-2K range). Also have a AR D52B that I will definitely be replacing. Totem Forest speakers Rega P3 Exposure ...
ARCDB
https://arcdb.ws/SP6/SP6.html
Distortion (THD) SP-6A: Harmonic distortion: Less than .01% at 2V RMS output, 60K ohm load, 20Hz to 20kHz (Typically about .001% in the midband). Intermodulation distortion: Less than .002% at 2V RMS output, 60K ohm load, SMPTE method. SP-6B: Harmonic distortion: Less than .01% at 2V RMS output, 20Hz to 20kHz (Typically about .0005% in midband).
Audio Research SP6 Tube Preamp - Kevin O
http://kevin.kevino.org/tubes/sp6.shtml
Modified Audio Research SP6 Tube Preamp. In July, 2002 I picked up a 1978 Audio Research SP6 preamp. Here is a photo from the original Ebay ad where I found and bid on it. The unit was in very good condition but badly in need of repair. This preamp had an above average power supply with 11 large twist-lok can capacitors.
Audio Research SP6A Stereo Pre Amplifier For Sale - Canuck ...
https://www.canuckaudiomart.com/details/649659681-audio-research-sp6a-stereo-pre-amplifier/
A Tune-up for the Audio Research SP-4/4A ... - Conrad Hoffman
http://conradhoffman.com/SP4A_caps.htm
A Tune-up for the Audio Research SP-4/4A Preamp. Introduction. The ARC SP-4 preamp was ARCs first solid state preamp. It was controversial at the time and some say it almost destroyed the company. Opinions about the sound quality are all over the map but based on dealer comments and my listening, it wasn't exactly world class.
Audio Research SP-6A - YouTube
https://www.youtube.com/watch?v=1debNRCDaw8
Function testing of SP-6A
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