I emailed Peter about this, he said it'll be released this year and be a very simple head called Lucy. It looks like it'll have 8 x EL-34B's in the power section, same type as in the SA-200. If it's anything like his Herbert guitar head, it'll be massively powerful, military specs, each tube pair should be individually biasable, (accept EL-34/6L6/6550/KT88 etc), and be dead reliable. I actually own a Diezel Herbert and IMO he's a few clicks above Koch as far as hi gain switching guitar heads go, I never ever ran out of headroom with this amp plus it sounded great at low volumes too, so I would assume the overdrive sounds on the bass head would be stellar too. Herberts and VH-4's run at 4K US,(obviously not for everyone although much cheaper in Europe), Salwender the US distributor is in Orange California. Here's the links: http://www.diezelamplification.com/html/lucy.htm http://www.salwender.com/Amps_Diezel.htm Looks like the latest version of the head on the right pic. There's nothing about Lucy on the Salwender site btw.