Audioman,
I have an audiophile friend who owns a CD-5s and tried Hifi Tuning fuses in his CD-5s and had this to say -
"Regarding the fuses, I recently purchased 12 of the very expensive HiFi-Tuning Supreme fuses, all of them required for Ayon CD Player. Initially when I put 3 of them them in Ayon I was disappointed, bcos it appeared very bright. So I wanted to return them immediately. Then I got the right direction for fuses from Ayon and installed the fuses with correct direction. Now it was much much better. The brightness was totally gone and the background became blacker. The Supreme fuses improved resolution and tighter base, but to my taste was not quite musical bcos the midrange and high frequencies were slightly thinned down a bit, maybe it just removed the hash and had cleaner background. Maybe in some system this would be fantastic, but is not for my taste I think and I might consider selling off the full set of fuses."
Also my Audio Engineer who is one of the top Audio Engineers in the world had this to say in response to my question about upgrading the stock fuses in my CD-5s -
"You know how I'm always saying you should read less and listen more? Well, here's the story: If you put a gold plated fuse into your CD player, it should really go into a gold plated fuseholder and be attached it via a gold plated interconnect to a gold plated power outlet connected by some special gold plated house-wiring to a gold plated fusebox... but then, it would still only be connected via a cadmium plated master fuse to several kilometres of steel cable slung between a bunch of wooden poles.
In other words, it'll make about as much difference to your CD player as a gold plated gearstick knob will make to the top speed of your car. If it makes you feel better (or if you think some doofus on a web forum knows more about it than I do), you're perfectly entitled to fit whatever type of fuses you like but as I think you've figured out by now, I'm only interested in modifications that deliver quantifiable results -- so until someone manages to convince me that their fuses contain some magic Juju that actually does make anything sound better (and preferably someone who isn't making $40 every time one of them blows!) it will remain on the list of things I refuse (no pun intended!) to get involved with."
Further I was discussing the improvements in the CD-5s vs CD-5 and received this reply from Gerhard Hirt -
"Believe me what I am telling you, there is an tiny improvement, not worth to discuss, the CD-5 or CD-5s are on the limit, we cant make them really better, therefore the main focus were some add features. So not need to be worry about anything. The only thing what you could do is DR version, thats it.
Enjoy your wonderful sounding CD-player is one of the best sounding player doesnt matter how much more others costs."
In summary, are the factory fuses really that shabby? My view is that the factory BB op amps present a larger bottleneck imho. But that is another story.