"Having the fuses in backwards causes the highs to become shrill, forward and hard sounding, bass lacks focus and instruments seem a bit out of sync in relationship to each other. The stock fuses are less dynamic, less transparent, do not image as well and seem to add a bit more distortion." That sounds pretty significant. Do try Magfan's test and see if you can tell. I tried this "blind" approach with the two Hi-fi Tuning fuses in my transport and DAC, and I could not hear it. Now, this argument can, and has gone on forever, but all I can say is try the fuses and have someone make the changes so you don't know which is in. If there was a noticeable difference in bass, dynamics, transparency, etc you should be able to notice it with this approach, and if there is, great, you got a big improvement for very little $$$. If you can't, then stick to the $1 fuses.