Hotmailjbc,
I am not saying that a perception of improved sonics with high end cables is due to placebo. I am saying placebo effect may have an influence on sonic perception. For example, I recently purchased an Esoteric K01 CD/SACD player. This is the best single box CD player I have ever heard. I auditioned the Esoteric G-Orb master clock for 2 weeks with my new player. The G-Orb is a very cool piece of equipment with amazing technology. I read several reviews and did extensive research on master clock use with two box and single box CD/SACD players (it was fun). I really wanted the G-Orb to make a significant improvement in sound, and initially I thought it did make an improvement. But after careful evaluation of all aspects of sound reproduction (dynamics, 3-d sound staging, instrument separation, bass, transients, midrange/voice, high frequency, low level detail, etc.) in all honesty, I could not detect any improvement whatsoever. My listening sessions were both lengthy and short A-B comparison using all types of music. The Esoteric K01 sounded exactly the same with and without the G-Orb (it sounds great). I think the G-orb will make a significant improvement with 2 box players (where it synchronizes the transport clock with the DAC clock), but I don't think it does a thing to improve the sound of a singal box player unless that player has a lousy clock to begin with. For me, this was a fun experiment, not a chore. My point is, subtle (not major) audio canges can easily be influenced by psychology. If we know that we are comparing a geogeous, highly regarded, expensive piece of equipment (a power cable or G-Orb master clock, for example) to an average stock power cable, I believe most of us will be subconsciously influenced to think the more beautifully crafted, expensive cable will sound better. I think this is very tough (not impossible, but tough)to fully avoid consistently. By subtle audio changes, I am referring to changes that would be difficult to notice witout very careful A-B evaluation. I am not saying that different power cables do not make a difference in sound, I am still uncertain on this topic. From the type of response we are getting in this thread, so far, it looks like the opinion on this topic among Audiogon members is about split 50/50. Psycho-acoustic influence does exist.