Where to use aftermarket power cords?

Certainly has made a difference for me on all equipment.
You don't realize that there can be blacker backgrounds until you get it from an upgraded PC.
Have one on my integrated amp (MF A300); and on my sources (Pioneer Elite DVD/CD, Cary 308).
I think it may depend on the actual construction of the power supplies and power delivery of each component as far as the amount of improvement, but I would recommend using one on all of your equipment except a subwoofer which probably does not need it.

No need to spend huge dollars as the upgrade from stock 18ga cords is significant usually with any aftermarket cord.

I started out using DIY 14ga Volex PC's that cost me about 10 bucks to make. Nice improvement all around.

I then splurged and switched out to Ven Haus power cords for everything which are less than 100$ a cord pre made (or you can do DIY with his materials) and they really allow the equipment to sound their best IMHO.

I am sure there may be are better cords than what I have, but for the money the VH cords are a great value.

Lots of magazines have reviewed aftermarket power cords. Check the archives at http://www.stereophile.com. What difference does it make what someone else thinks though? You can get a PC for under $100, listen for yourself.

I quit subscribing to stereophile about eight years ago when all the talk about PCs started. That was just too much for me. A couple of years ago they sent me a subscription offer that was real cheap... so I thought what the heck.

They were still talking about PCs so I thought I'd find out what all the noise was about. I bought a cheap PC and hooked it up. The difference was immediate. I moved on to better cords before going to DIY cords from Chris VenHaus. I have them everywhere I can put one now and they are well worth the cost. That's the expereince of a former skeptic.

Instead of relying on the opinions of others, why not try some cables on both your source and amp from the Cable Company. They have a cable library that lets you hear the results in your system, with your music, your room acoustics and most importantly, your ears. Their website is www.fatwyre.com - check it out!