At my acoustic gig last week I used the solid state channel of the genz to eq the vtrm to be as flat as possible when the vt's controls were all at noon. (gain at 9:00 with the input on the back of the rack in the attenuated position, my bass distorts the regular input, it's very hot) When set up like this I got a great sound going direct to the board, no amp ever used at acoustic type gigs. It also made the vt's controls even more responsive, useful and musical. Made the overdriven tones sound more "real" as well. Im thinking that I'll use this type of setup when my 1212/5 cab finally arrives. When using the nv610 I set the controls as mentioned above and use the genz's tube channel set flat. It's great to have this option. I still really wish that tech21 had included the speaker sim defeat to get rid of that big bump at 3.2k like the vt2 does. I would need much less or no eq from the genz that way. If anyone is doing a mod, I'd like to use it. Either way, the vtrm is really working well for me. I don't suggest changing the jumper settings as the stock settings sound the best. Some people might like the hp filter removed but, I find that it makes the bass control too wide. Oh, at the acoustice gig I still use the rolls crossover to remove everything below 80-100hz.