On 11/06/2016 08:43, Brian Gaff wrote:

I had a Sinclair z12 amp that could put out a whole 12 watts, but although
it was not bad for crossover, it did sound kind of fluffy at times.

This one? http://rk.nvg.ntnu.no/sinclair/audio/z12.htm
What a pile of crap!

I became quite adept at fixing Z30s in my youth.
http://rk.nvg.ntnu.no/sinclair/audio/z30.htm
Maybe a much bigger heat sink would have helped
but they hardly ever survived a party.

--
Eiron.