question on pwr cords


Does the length of a power cord impact sound quality greatly? Obviously analogue interconnect, especialy when single ended and speaker cable do....the reason is due to my lack of outlets and positioning of equipment considering ordering a custom length power cord for a pwr amp.

In addition if I want a less obstrusive, less thick pwr cord, what would u recommend? Cost is less of an issue. Crystal ultra?
henryhk

Showing 3 responses by tplavas

Blakeaudio,

I can hear the difference between a 1.5 and 2 meter power cable of the same type, and so can you, if you'd try it.

Also Nsgarch, not all CDP's and DACS sound better with 10awg or heavier PC's. Some, maybe even most, do, but not all. A friend has a modded Sony SACD player that sounds best with 11-12 awg PC's. I've also owned some DSP units that only sounded 'right' with their original PC's, which were only 16 awg. Why? I wish I knew for sure. :)
Newbee,

I'll assume that you weren't being sarcastic with your question and give you an answer.
It depends on the specific power cable, but even small changes in length can be heard. Again, it varies depending on cable design, but generally the shorter the power cable gets, the more 'forward' the sound, along with some perceived movement in the soundstage. With some PC's, this difference can be pretty drastic, most likely because of their fairly high inductance (compared to the 'average' PC). Heavy-gauge PC's with lower inductance tend to minimize the change in sound with length.
I don't think it's a coincidence that most of the positively reviewed, well-known power cords I've tried sound best in lengths between 5-8 feet (in my opinion). I'm sure most successful PC manufacturers consider the sonic effects of length when designing their power cords.
Frankly, I'm always quite surprised at the jeering that takes place every time someone brings up the subject of power cord length. If one believes that PC's make a difference, why is it so hard to believe that their length affects a difference as well?
Newbee,
I'll agree with Tvad, the power supply of a component won't prohibit if from being affected by it's power cord, although it does have some effect IME. I've had components with 2Kva transformers that were practically 'transparent' to sonic signatures of PC's, and mass-market stuff that only likes the cheapie PC that came in it's box.
In the very first iteration of my system, I tried a couple of PC's (TARA labs and Virtual Dynamics) and didn't hear enough of a difference to convince me I was hearing anything at all. The biggest sonic difference between that system and my current setup is the quality of the bass and mid-bass, and the quality and quantity of midrange dynamics. That early setup was pretty poor at differentiating bass notes, and most of it's dynamics were heard as upper-midrange harmonics, focused on the leading edges of notes, and weak on the follow-up. My current setup is better in all those respects, before any AC 'enhancements' are employed, and far, far, better after.