12au7 tube?

@mulveling I don’t know about that assessment as the 12AU7 is used in the pre section of the integrated amp... you definitely need to it t be quite or you will amplify it

Oops, missed that part of your amp; assumed it was power only. I did not consider they might create 845 based amps in a "space saving" integrated form factor lol. Yep you need quiet 12au7 tubes. Stick to 12au7, 6189, cv4003, and (maybe) 5814 types then.

Andy at VTS (recommended below) can very carefully select for noise, but I’m not sure how his stock levels are these days, other than RCAs. Upscale Audio used to have some great vintage options (Platinum or Gold grades); most of them long gone now. Other than that you can play the buy-and-try game on ebay, or try some of the new production tubes.

I’ve used Arizona Tube Supply in the past for some of these tube types, and I like him. They are generally used but good quality tubes.

Gold Lyons are everything I want out of a tube, could not sound better.

Amperex AU7 NOS "Bugle Boy" if you can find them with enough life left in them.

https://www.ebay.com/sch/i.html?_nkw=amperex+NOS++AU7+Bugle+Boy&_sacat=0&_from=R40&_trksid=p2334524.m570.l1313&_odkw=amperex+NOS+Bugle+Boy&_osacat=0

@bolong +1

Tried 22 different pairs of vintage 12au7s, and 6 pairs of new re-issues.

Vintage best for me, 1965 Blackburn Plant Mullards if you like vintage. Stored now.

New, PSVANEs are lasting longer than any of my former Gold Lyons.

Get them curve tracer matched triodes w/guarantee, with guarantee.