My Anthem Amp 1 came with Electro Harmonix El34's which I believe are made by Sovtek. I changed over to Svetlana and the sound is much smoother. Something else I have discovered is after I changed preamps(Anthem pre2L to ARC Ls7)the low end has improved. Don't know if the new pre is letting the Svetlanas do there thing or the pre2L was just lacking. Any comments?
