2. amps-preamps
  3. 1282413820

Audio Research REF 3 and REF 5 Tweaks

Hi,
I was wondering what tweaks have been used successfully with these two preamps? I'm thinking specifically of footers, weights, tube dampers, powercords, etc. I haven't considered tube rolling as from what I've read, the tubes ARC recommends are probably overall the best.

I've tried several products including Vibrapods/Vibracones, and various isolation products from Herbies on my REF 3 with mixed results. (I keep going back to stock.) So far the best tweak has been to purchase and place Herbies Ultrasonic Tube dampers on the two power tubes, the 6550 and the 6h30, in the powersupply. Strangely ARC does not include dampers for these two tubes but the addition of Herbies tube dampers really cleans things up.
I use Solidsteal shelving which have been damped with sand.
So what have you all tried that you think would be a worth whild audition?
Thanks in advance,
Sgr
sgr

Showing 1 response by cleeds

cleeds
6,072 posts
 
lostbears
ARC use to recommend no cover. before they introduced the Plexi covers.
Hmmmm, I'm not sure that's true. It's certainly not mentioned in any of the ARC owner's manuals that I've seen. It would also pose a potential shock hazard so it's a hard practice to recommend - even if some users with no children or pets do it anyway.
The problem is that the Plexi cover will start to melt over time and dip slightly above the 6550 tube if you leave in on for long periods.
That won't happen with adequate ventilation. The plexi cover is a bit like the "canary in the coalmine."
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