A-B testing of cables


I recently attended The Show in Newport Beach California, and I asked some experts how to upgrade my cables gradually. I was told to start at the source. I should upgrade the source interconnect first then gradually work my way through the system, and I should hear the difference at each stage providing I am using audiophile quality cables; so I bought some cables at over $600 a pair to try out. My current cables cost $250 a pair.
My system is composed of:
McIntosh C2500 preamp
McIntosh 601 mono blocks
McIntosh mcd 205 CD player
VPI Classic 3 turntable
Nola Baby Grand speakers

I bought two y adapters and connected one pair of new cable and old cable between the CD player and preamp to do an A-B test. I also performed the same test with the turntable but I could not tell the difference between the cables whatsoever. I was very surprised and disappointed at the same time. I could not believe it so I called in others to have a listen whithout telling them what I was doing and they too could not tell the difference.

Has anyone else tried this test? I would like to hear your results.
Am I doing something wrong?

What is your experience in doing A-B testing of interconnects?
almandog
Mcintosh, while being very well made, isn't the most detailed equipment that you can buy. It wouldn't be my first choice to do a cable shootout with. And that's not necessarily a bad thing. Sometimes the more detailed gear can drive you crazy.

Looking at the cables you tried, the AQ, Morrow, Audience are all solid core copper designs. Not that they should all sound the same, but you can expect some similarities between them. If you're trying to hear a difference take one of the solid core cables and put it next to the Straight Wire. When you listen, play something well recorded that has a singer and just one or a few instruments, like a piano or an acoustic guitar. Closely miced recordings like this present a lot of detail and it makes it much easier to hear small differences. Listen to the high frequencies, like cymbals and vocal sibilance. You should here some differences in those areas. Also, pay attention to image size, or scale. The difference may not be big, but there's usually a difference to be heard changing from stranded to solid core.

Sometimes when dealing with products like cables, that don't always make a big difference, you just need to focus and hear it that first time. Once you hear something for the first time, its usually much easier to keep hearing the same type of thing, again and again.
Roger Russell dealt with this subject at McIntosh. While his testing at the time didn't specifically address IC cables, the came to some interesting conclusions. Link [urlhttp://www.roger-russell.com/truth/truth.htm#truthandsuper]here[/url]. You can also check out his comments on speaker wire where he feels physics is physics.
Missed the =. Link here[urlhttp://www.roger-russell.com/truth/truth.htm#truthandsuper]here[/url].
The advice to start at the source assumes that the old cables further downstream are not "bottlenecking" your system. If they in fact are, any (possible) improvement upstream may be masked by them. Shunyata recommends auditioning their power cables by temporarily using them system wide, to get the cumulative effect, warning that changing only one cord may not be indicative of the improvement possible with their product. All that takes is a willing dealer!