This has been a spectacularly fast moving thread and fun to follow. I'd even say it's been educational but I can't claim to properly understand all the "sciency bits". It does seem a bit like "when science meets religion", though (agnostics, atheists, deeply committeds, converts....)

Nick, why did you decided to keep your money in your pocket? Is it because the sound wasn't preferable or because the change lacks credibility or something else?

I can't add to the erudition here but I'd offer the observation that Naim and Cyrus, to name but two, offer external power supplies as upogrades to their products and I've heard of none who say there is no improvement. I've mucked around in a very limited way with Isotek and Missing Link products. They make my system sound different (it needs all the hi-fi reviewers jargon to describe it, though). As a result of the mucking around, I will spend money on Missing Link products before I upgrade my 598 or 568.2

A question: Mark at The Missing Link tends not to make claims for their products but he thinks they make a difference worth owning. Does he take this stance because there is no sustainable scientific justification or, perhaps, because the snake oil market is big enough and forgiving enough?

Regards,
Steve

Steve