how can a line cord affect frequency response ?

Jafox...

And Albert, did you notice the Wotans for sale? Or are you holding out on a pair of JL-2s or quad of JL-3's?

Please don't get me started on more amps, I just got mine tubed up right and sounding good.

The power cord doesn't affect frequency response, however it can affect dynamics and in some cases become an antenna for RF. When RF gets into your amplifier, then it can affect the sound in many ways:bright, lean, hard, glassy, etc. Normally, the power supply should eliminate these effects, but in some cases, it doesn't.

It never ceases to amaze me just how cheap some expensive amplifiers can be. Some factory power cords are really inexpensive. When you replace them with better quality ones, there can be a small difference in DC levels in the power supply, which you will hear. However, none of this will affect frequency response.

Whether or not you will get the same effect(s) with a Belden 14 gauge shielded power cord for 10 or 12 bucks is a whole different matter.

I have followed this thread closely and until now have not felt like saying anything. But the last post by Sp has sparked me to reply.

Over the past ten years or so I have listened to atleast 100 or more power cords in my system. Never satisfied with the results, I started building my own. At last count, probably 30 samples. Every type of wire, geometry , shielding method and terminations imagineable.

None of my final designs, with the execption of (1) are shielded. Shielding, IMO adds an audible coloration that I find quite annoying.

The question, "how can a line cord affect frequency response?"

Based on my experience, the #1 factor by far is the type of conductor material the cord is built of. Everything else is secondary. How?, the same way an interconnect does. Use conductors that restrict bandwidth and the frequency response will be adversely affected.

what about resistance ? suppose you design a poer cord with very high levels of resistance. will that affect treble reponse ?

or, suppose you design a power cord with a very high level of inductance, what then ?