They have the same exact amp (used Herbert), clean, at Guitar Center Fountain Valley, CA for $3200 and it's been sitting there like dookie on the street because of the exorbitant price! I had played my friend's Einstein head so this was the second Diezel I ever played and it SOLD ME on Diezel, it sounded great at any volume, in fact low almost sounded better (!) and I went out of my way to get a shitty sound but couldn't! In retrospect I should have gotten a Herbert but I wanted to try out a VH4 first and then D-Moll became available and was over $1,000 less than Herbie so I got that instead. But I was not too impressed with the D-Moll, it's nowhere near the Herbie so luckily the seller is taking it back at full credit and getting me a Herbert. Lesson learned