Pre-amps with seperate power supplies .....

Overall in this hobby, I think prices skew our judgment and ears, not to say expensive stuff does not sound better but the Yellow Eagle plug example by Gbart says it perfectly.

As to the OP question, that umbilical of the CP 700 looks a lot nicer than the ordinary looking network cat5 patch cable looking umbilical of my Bryston BP-20. I often wondered too about upgrading mine but it is hardwired into the ps so I will keep on wondering :)

Years ago before we made our first preamp we began using IEC connections on our amps (which continued with our preamps) for the simple reason that audiophiles like to tinker.

If the power cord is integrated into the equipment that means they might be rewiring part of the product. So we went to IEC connections so a person could try power cords to their heart's content. It turns out that certain power cords do indeed sound better than others, but not in all situations. So you can't assume that a particular power cord will be best. As a result we use a cord that is adequate, but you may get better sound with a different cord.

This is more likely with our amps than our preamp, which has tightly regulated supplies with lots of overhead. Under such circumstances the power cord has far less effect.

Wholeheartedly agree with Ralph

Atmasphere, Years ago before you made your first preamp aftermarket power cords were not popular.

I had a long talk with the technical support group at Classe' concerning the upgrading of my umbilical cord on the CP-700. Actully Bobpaule, you hit the nail right on the head. Classe' had explained to me and some of it will be lost here as I do not have an engineering or electrical enginering background is that there is such a small current going through the cord and it was built with the issues that we have all addressed here in mind...RFI,EMI etc. in that by changing the cord you could also be possibly changing the current, impedence and also be changing the sound achieved / desired by this pre-amp. They also said that they have discussed this with others and the general consensus is, you will not hear that much of a change in sound for what you will pay for an increase in that cord.....also, I need a longer length and Classe' stated be careful as the cord was built in the length to handle the current needs....any longer and you could, could run into some trouble. As the origonal poster....I will leave as is and thank you for all of yuor input.