Timpy,

I can understand that you wouldn't want to go through with this level of buggering about but I think that sort of buggering about is necessary to get a meaningful result from double-blind type tests. Since hardly anyone will go to these lengths this could be the real reason to invalidate double blind ie. a practical reason. I remember reading Martin Colloms describing a double blind test he did at Audiolab where two almost identical 8000 series amps were used, only difference was he type of shunt resisitor in one part of the amplifier. He could reliably tell them apart, pity this test wasn't expanded and made into an article.

Cookie,

Apologies for my use of laguage, it was uncalled for. I still take issue with your views on progress or lack of it and I can't think of many things that take wtwice as long, even the M25 seems to move better in recent years ;->

Cheers

Jason