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AUDIO RESEARCH SP6a
https://www.audioantiquary.com/en-us/audio-research-sp6a/
AUDIO RESEARCH SP6a ... Like all full-tube preamps, the sound quality is proportionate to the quality of the tubes installed. 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.
Audio Research SP6 Tube Preamp - Kevin O
http://kevin.kevino.org/tubes/sp6.shtml
The GFA-555 MkII has been replaced with a Parasound HCA-2200. A new turntable purchase led to the desire for a better phono preamp better than the stock design in the SP6. Time constraints, as well as the limited available space in the SP6 for a more sophisticated design, led to the purchase of an Audio Research PH-5 hybrid phono preamp.
Audio Research SP6A Vacuum Tube Preamp | Tube | Audiogon
https://www.audiogon.com/listings/tube-audio-research-sp6a-vacuum-tube-preamp-2017-09-21-amplifiers
Audio Research SP6A for sale. Fully vacuum tube preamplifier from ARC with tube phono stage. This preamp is offered on behalf of Austin Stereo Service in Austin Texas. As with all the gear we sell, the electrolytic capacitors h...
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...
Is Audio Research SP-6 considered a good model?
https://forum.audiogon.com/discussions/is-audio-research-sp-6-considered-a-good-model
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).
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