My WA2 arrived yesterday. (I thought I'd post this here, rather than the WA2 thread, which sees limited activity these days, and because this thread seems to be for all things Woo...) I've got it up and running, and wanted to share my first impressions, along with a question or two.
The WA2 is stock, and black. I also have a Meier Concerto, and my idea was to build a two amp system, using my LCD2s and D7000s with the Concerto, and my HD800s with the WA2. It's probably too soon to tell, but so far, my HD800s sound better than they ever have. More bass, and an even wider soundstage. After getting the LCD2s, the HD800s were getting about 20% of my listening time; now I think it will be back up to 50%, or more. (And I may have some D7000s up for sale soon . . .)
The WA2 came with GE 6080 power tubes, and unmarked EZ80s, which I think might be Philips, along with unmarked 6922s (just wrapped, no boxes) that I think might be Telefunken, based on the PDF links on the Woo site. These stock tubes sound fine; I also have a pair of RCA 6AS7Gs that seem to widen the soundstage a bit, and open up the upper midrange, but they have less bass then the GE 6080s. I realize that all of this may change over time, but I'm liking the sound a lot so far, as well as all of my options now that I have two amps.
By the way, I can run both amps off of the Stage DAC, which is nice.
I've read all of the WA2 tube rolling threads I could find, but most of that info is 2 years old, or more, and the prices mentioned for a lot of the tube upgrades are certainly not valid anymore. I got the WA2 so I could get into tube rolling in a bigger way (I had a WA6SE, which didn't offer as many tube options) and I will be looking to experiment with some upgrades.
The Woo site offers some upgraded tubes, but I don't think I want to spend $280 for Amperex 7380s, etc. I could ask what WA2 owners are using, but if you've had upgraded tubes for awhile, you probably paid a lot less for them than I would have to now; are there any 'bang for the buck' upgrades available these days? I have been especially interested in the Sylvania 7236, which don't seem too pricey yet, and I wonder what the improvement would be there. I'm assuming, as I've read, that the power tube upgrade will make the most difference, but I'm interested in all options.