Seydel Hyperamp I
This amp is seen rarely, may be due to the price. I have not seen one in a long time. It does not deserve that. It's a good amp. The features are well thought-out, it is close to my 15W PP, but some things are completely different.
The tone control is a normal Fender stack, do not believe in the nonsense on the net. I would exchange the bass control for a 250k to make it more controllable. But else ... everything is great. The decent construction looks a little "unscheduled" ... like a "doctored" guitar amp from the 70's ... I just say Vermona. The transformers seem rather cheap, the high price is caused by the manual work, I suppose.