thank you kyle - I am currently using my WA33 (422A rectifier and stock tubes) with my Abyss 1266 Phi with the SC cables. I did not notice the sound to be "muddy" - but what do you mean by "muddy" anyways? the thing that was immediately noticeable to me was how much bass I was hearing - and i am unsure whether this is a good thing or not
the sheer amount of bass was not apparent to me on the WA22. on the WA22, I am using these tubes: Western Electric 422A rectifier, 2 x Western Electric 421A power and 2 x Sylvania 6SN7W Metal Base driver tubes. the sound on the WA22 with this particular set of tubes is glorious to my ears.
today i swapped out the WE422A rectifier and put in the stock rectifier in the WA33. from what I can hear so far, there is no immediately noticeable difference to my ears.