Just got my Sol P this week, I read through the entire thread before placed the order and I have to say almost all the comments are spot on, especially its warm tonality compared to Susvara, TC and Utopia. I think there were are discussion earlier in the thread on ultra wide pads. Not sure if...

@Clive101 I believe the 913 number you see from your tube is Western Electric vacuum tube manufacture date code. You can google and find document online that explains how to read the code. The challenge is that these manufactures change their date code format from time to time. So it makes...

I currently have a pair of Sennheiser HD800 which is my very first purchase of high end HP. I know most people feel like with its great detail sound resolution it lacks solid bass and its treble tend to be on the bright side and can cause listening fatigue. When I first have it I paired it...

I have tried several different rectifier tubes such s WE422A, WE274B, USAF 596, BVA Cossor 53KU, Mullard CV575 and Taka 274B when I was really into tube rolling. Not much these days now as it is an endless $$ hole...LOL My general impression is that while I may "hear" (as some people may...

@ThanatosVI you are correct！I should pay attention to their pin configuration and data sheet more carefully before jump into conclusion that they need adapters. Both have the identical pins and data sheet seems to suggest that I might be able to use them. Thanks!

Sorry that I should be more clean on my post. I can use WE equivalent 2A3 tubes with purchased adapters However just want to be sure I don't end up damage my unit while manufacture warranty won't cover the repair. I do have 300B 2.5V version from EML.

I too have WE417a with WE422a as rectifier and KR 2A3 tubes on my WA33 amp. Love the synergy of this combo. Now I wonder if Woo will consider making adapter for WE equivalent 2A3 tubes to be used in WA33?

@Roasty I use XLR to connect my May unit to WA33 and it seems fine without clips or distortion. Maybe my ears are not able to detect them? Will have to experiment with RCA output to check this.

Also I wonder if the puffing sound we heard is related to mesh plate burning process? Anyone with solid plate have the similar experience? I only hear it when use sensitive headphone like Utopia but not Susvara or Abby 1266 TC. They don't come very often but when they do it could persist for a...

I got all my EML tubes from George @ TubeUSA. He is a great guys to work with. When my WA33 elite unit transformer blown last year (many thanks to Mike from Woo to help me take care of it immediately), George offer to test my EML 300B tubes and perform extra burn-in for me... He even called...

I have used 422A rectifier tube for my WA33 amp and love it. Personally I prefer it better than other rectifier tubes, including Tak 274B and GE 274B..etc. Based on the picture you show the date code is 426 probably it was manufactured back in June-1954 timeframe. Compared to other rectifier...

@Roasty and @Bonddam Have you tried NOS 2A3 tubes? I have a quad set of RCA 2A3 when I got my first WA33 standard model. I do like them better than KR 2A3 for thicker mid but EML 300b still trump over them on bass.

Totally agree with your view of KR 2A3 tubes and I think EML 2A3 mesh tube does have more "body" in its presentation than KR. I was told that in general solid plate does give you a better presentation (deeper and richer) of bass than mesh tube. And I have always been wondering if I should give...

With respect to 300B vs 2A3 mesh tubes perference. Gee it is a tough call for me! :) My personal views are that these two types of tubes have their own sound signature that I thought 300B has a richer mid and deeper bass while 2A3 overall presentation is slightly well balance than 300B. In...

@Roasty The only time I can hear noise from my WA33 amp with EML mesh tubes is when I use sensitive headphone like Utopia. Do not have noise issue when paired with Abbys TC, Susvara or LCD-4 . They are very quiet to my ears. The noise I got when use Utopia is occasional and sounds like puff...