List Of Small Company Tube Amps

@wsrrsw Glad you had a different experience.

From the Rogers User Manual

This is a limited warranty, transferable to subsequent owners of the amplifier. The amplifier must be registered after purchase with the Rogers Factory at the indicated address using the attached registration form. The transfer resale must be made through an authorized Rogers High Fidelity dealer.

Rogers High Fidelity is likely one of the few, if not the only authorized dealer left, so yes, it needs to go back to Roger for transfer. The fee is $500-$750 (depending on what day of the week it is) + shipping both ways, of course. 

Someone mentioned Black Ice / Jolida.

I can't speak to their amps but I am really happy with their Tube DAC. 

In relation to the Spatial Labs Models produced by D, Sachs / L Olson, these Models are very rare in the fact their Design Concept to End Product is very well documented with rarely seen input from designers. This says a lot, and the growing interest / Waiting List says much more.

Another Brand that is referred to in this thread, did take the same approach and in the Raven/ Blackbird Thread, doing their utmost to keep themselves prominent as a alternative Brand?  

NAT audio, big powerful set amps, big money.

Modwright, by Dan Wright.