Thanks Dim-Span, thought that would be right. Have tried online, the only info i can get is that the military use them so must be good.
They were purchased along with the SUGDEN BIJOU system in a high end dealer in glasgow. The Stratos is what he used to demo them as well as a lot of other equipment. The speakers are only 3 months old and are Spendor A6, on the end of Atlas hyper 3 cables, i think the whole system sounds fantastic, so as you say if your happy then don,t change.
Thanks for your advice. John