TAD-60 from Tube Audio Design. This has UL/Triode switch and the best feature ever for a small tube amp: Variable Global Negative Feedback. Also you can run this in a pseodo single ended mode where you bias one tube hot and one tube cold. This surely sounds weird but it has a nice result. I think versatility is the key word for this amp. I'm not associated with the company, just a very happy customer.
