I have a couple of blue SR fuses that I believe have provided a cost effective improvement to my system. However, I concur with Goergehifi's point regarding corroded fuses.
I experienced a great improvement to my system when I replaced the visibly corroded fuses in an Aragon 4004 MKII amp with a cheap set of fuses from Radioshack. The Hifituning fuses were the only fancy audio fuses available at the time and thought that they were awful when I replaced the Radioshack fuses.
It's only a matter of time until our current audio fuses start to corrode as well.
I experienced a great improvement to my system when I replaced the visibly corroded fuses in an Aragon 4004 MKII amp with a cheap set of fuses from Radioshack. The Hifituning fuses were the only fancy audio fuses available at the time and thought that they were awful when I replaced the Radioshack fuses.
It's only a matter of time until our current audio fuses start to corrode as well.