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
128x128sgr
My Brand new black ARC Ref 6 came in the other day and to my big surprise was the new twice as thick plexiglass cover that comes with the new 6s now. The front and 2 sides are beveled to making it very attractive also. It came with the smoked plexiglass with black screws prob because i bought the black 6. It will prob come with the clear cover if bought the natural silver finish. Anyway there is no way this new thick cover will dip from the heat. 
Ref5se

Tung Sol as noted by others in 6550 is a massive difference....Andy at Vintage Tube helped source mine

Ayre myrtlewood blocks under

i hear a slight change with display off. bigger change when I have DAC display off



Very nice-  tomic601

the Ref5SE is a honey of a pre-amp. Good to read that a little tube-rolling makes a positive difference.

Happy Listening!