Artg, I agree with you, rolling tubes definately lets you voice an amp/pre amp to your personnal preference, this is true on ALL tube eq. What is so stupid IMHO, is when reviewers receive tube eq. they use esoteric interconnects, speaker wire, and STOCK frikin tubes. Whas that all about? I just don't get it. Same with the folks here on the Gon. IMHO, you HAVE to voice each tube amp w/nos tubes to really see whatcha got. JMHO.