Well, the Quad arrived today, and for the money sounds fab! I'm very impressed indeed by the quality of sound (huge, dynamic and detailed) this dinky little amp produces. It certainly has no problem whatsoever driving the Tannoys - well I guess it wouldn't with them being 95db efficient. 50W is certainly, erm. 'adequate'!

In terms of gain, I needn't have worried, as although the 306 is certainly sensitive, it turns out that Copper amp (on its current feedback settings) is even more sensitive So... No problems with any overloading!

I'll comment more on the 306, after it's been properly warmed up, and I get more used to its sonic signature, but it's certainly the best £285 I've ever spent on an amplifier, thus it will provide adequate back up for the Copper amp, when used in the sorts of situations I outlined earlier.

Delighted

Marco.