No...the tubes are right under the cover very easy to get at. I did end up getting and email, this is what they said.
"OK, I spoke with the engineer and he supplied the following information regarding what tubes drive which stages. The tubes are placed in the circuit left to right as you look at the front of the amp. Each tube has multiple stages stages so each tube may effect multiple functions".
V1 – Input driver and Contour
V2- High Mid
V3- Low Mid/ Bass and Treble
Last edited by 2string1 : 11-27-2013 at 02:45 PM.