Tannoy speakers with SET valve amp 845 tube

[petrat]

I'd always recommend either big push-pull valve amps or Class A solid-state for the modern Tannoy dual-concentrics.
Although the speakers are sensitive, they really come alive with amplifiers that have a decent wodge of current-driving capability, which is not the forte of SETs usually.
Your Sugdens are probably a decent match already, but if you fancy something a little 'warmer', but still detailed, then have a listen to the Accuphase integrated amps, which are a class above the Sugdens ime.

[opt817]

Hello, thanks for recommendation. Can you suggest best model, still affordable from Accuphase, with warmer sound? Probably the A class model?

[petrat]

Accuphase prices vary considerably from country to country.
In the UK, new ones are rather pricey, so maybe look for a used E-600 if the E-650 is too much? €6K seems normal for a mint E-600.
The phono-boards are very good btw. DAC board less so.
Don't be put off by the 30W output ... these things are massively powerful, and are a known match for modern Tannoys.
Best-built bit of kit I've ever owned.