fuses - the $39 ones or the 85 cent ones

Rodman, you are hilarious. :-)

My experience with these fancy fuses is as follows. They made very noticeable improvement on the power amp, but not much (if any at all) on the preamp and CD player.

Magfan, have you tried cables made of different materials? Silver cable sounds differently to my ears than copper cable. If you agree to this, then the rest is obvious.

The speakers are really powered by B+. The audio signal controls how B+ is transferred to the speakers. So any sonic signature in the B+ will be carried to the speakers.

The material used in regular fuses don't sound good to the ears. That's why some folks bypassed them. (Not a good idea though.) So if these fuses are coated with some nice materials like silver and gold, they can improve sound to human ears, well at least to some of the human ears.

Some part of science is observing the behavior in the world and then try to find theory to examine them. In other words, if one always uses what he/she knows in the past to judge new behaviors, the science would not have come this far.....

vett93 (Ph.D. in EE)

Magfan, not to pick on you again. But ISO does not guarantee that a fuse will work like a fuse. It is a process certification, not a product certification.

Agreed with Rodman. My Counterpoint NP100 uses 5 fuses, 1 for AC and 4 for rails. The sonic improvement from these Hi-Fi Tuning fuses is substantial. I can't remember anything close to $200 that has yielded this much improvement.