The sonic characteristic of a fuse inserted in the wrong direction is overly bright or harsh, relatively speaking. If the sound seems overly bright then perhaps the fuse(s) should be reversed.
Hi-Fi Tuning gold fuse on Parasound
I picked a pair of Hi-Fi tuning 5A fuses for my Parasound HCA 5 channel amp (only for the front channels). After giving some burn-in time, I noticed the fuses add an extra brightness to the sound. This makes the sound a little forward. But this adds a sense of realism and dimension. Does anyone have experience using these fuses on Parasound gear.