I installed 5 of them in my old McCormack DNA-2 Rev. A. 1 external and 4 internal.
The 4 internals actually made for a very decent improvement eliminating a bit of harshness, adding a slightly fuller/richer sound, and adding a bit more detail on the top end.
In the scheme of things the $125 for the 5 fuses were well worth the upgrade. Of course compared to a $0.10 fuse, they are way overpriced.
The IsoClean fuses are directional, so be certain to try reversing their direction if you don't notice improvements.
In my experience, like other basic electronics, they took about 40 hours to burn-in.
-IMO
The 4 internals actually made for a very decent improvement eliminating a bit of harshness, adding a slightly fuller/richer sound, and adding a bit more detail on the top end.
In the scheme of things the $125 for the 5 fuses were well worth the upgrade. Of course compared to a $0.10 fuse, they are way overpriced.
The IsoClean fuses are directional, so be certain to try reversing their direction if you don't notice improvements.
In my experience, like other basic electronics, they took about 40 hours to burn-in.
-IMO