I highly prefer the RFT EZ81 over any EZ80 I've ever listened to. I'll be honest, I couldn't tell the difference between the stock Ei EZ80's and a few other brands I tried. The RFT EZ81's made a noticeable difference. Pick up a pair or two from TubeMonger: http://www.tubemonger.com/RFT_E_German_EZ81_6CA4_Rectifier_tubes_p/526.htm
my favorites are the RFT EZ80 and the Tesla EZ81 (NOS, not the JJ current production). I feel like the EZ80's are just smoother and the EZ81 are a little edgier. the RFT seemed really nice, i bought a spare RFT EZ80 a week ago.
Hey, I was hoping someone here might be able to give me a good tip. I'm trying to find tubes for the WA6-SE that pair well with the LCD-2. I ordered the amp with the Sophia rectifier tube upgrade and the stock driver tubes (sylvania 6ew7). I'm finding that my HD600 sounds better than ever, but I'm not sure if this tube combination is the best for the LCD-2. What I'm hearing is a harsh treble mostly, especially when I turn the volume up. I'd like to find something that balances the sound a bit, less harsh in the highs, and perhaps more mid-bass/mid-range impact. Also, for some reason the HD600's bass has drastically improved with this setup but the bass on my LCD-2's is lacking and sounds much weaker than the HD600's. Typically the LCD-2's sound much bassier to my ears, so it's a bit confusing to me.
I'm mainly looking for driver tubes but I'm open to trying different rectifier tubes also. I've been searching through all the threads and it's a bit overwhelming so it would be great to hear from someone directly. Thanks in advance.
you are correct, that Sophia + 6EW7 combo is great for sennheisers, however its not the best for the LCD-2 (not sure about the sharp treble though, should be a fairly smooth treble with those tubes). the 6EW7 are bass light and lower gain though, i feel this is why they suck with LCD-2.
anyways, the best combo is the 596 rectifier + 6GL7 upgrade tubes (6FD7 are ok here but i prefer 6GL7), another combo is Sophia + 6FD7 or 6DR7 (i find the 6DR7 to be tubey and smooth, but not as clean as 6FD7). also for LCD-2, you can switch out the sophia/596 in these combinations for a Mullard GZ34.
Edited by Dubstep Girl - 5/2/13 at 10:56pm