HiFi tuning fuses, some benefits help

I replaced the 3 fuses in my Sugden A21 and really didn't want to hear a difference because that means I now would need to replace fuses in many different pieces. So I always err on the side of cynical. However, I really did hear a more open presentation and cursed my future purchases. Same cynical approach with power cord upgrades was met with a mixture of appreciation and resignation to more investment.

Please see http://www.affordableaudio.org/issues.html for measurement result.

For me I heard more details. The increase in details for the bass is quite obvious.

Thank you for all your answers (so far). Now to another part of the question not asked, when you replaced the fuses with either (HiFi Tuning or a different brand of high end fuse) was it in tubed or solid state and was it just in the amp or what piece(s) of equipment was it used in? and dispite the fact did it still have the same difference in sound/presentation?

I have them in Magnapans, and a PrimaLuna Prologue 8 CD player. They make a difference.

I have them in equipment that uses fuses. My Amp has a breaker , no fuses.
I think they add a little more spark to the presentation.
For a nominal fee they are worth it.
Why dont you just buy them ?
Geez they are only $25 bucks now at the Cable Company.