yeah you're right, and the price is impressive for a US make amp with all these features, I thought they were all 2000+
Have been researching the nuts off amps of late and played quite a few (BadCat,Koch,Powerball Engl,VHT) but not a Diezel as guy books a studio for you to try em and as they are abit steep for me atm.
However, look closely at the Knucklehead spec. sheet and tell me it don't resemble a Diezel Herbert :)
Paul Rivera apparently worked for both Fender and Marshall and Peter Diezel began by modding Marshall's. However, I believe the Knucklehead may have been around a wee bit longer than the Herbert,hmmmm :)
Anywhoo, it really is an amazing amp. You can tell abit by the weight, it's an 'arm stretcher!'