Mmm, Based on what grannyring said, I believe my digital player having no glass fuses or fuse holder is very good, when at first I believed the scheme was some sort of cheap implementation, I have followed grannyring and talked to him on these thread's for the last few year's, I respect him, and a few other's here on this thread, I will tell you all, when it comes to diy high end electronics, the man has a lot of experience, what he does is real world tweak's that save him alot of money! , however, his explanation of these after market fuses to me is spot on, makes practical since , my opinion, like all audio, some works, some don't, depending on preference, and any given component that may, and may not be improved by these fuses, personally, I've seen certain components sound like crap on certain speaker's, when the same speaker's sound incredible on other component's, does this mean the speaker's don't work or are inferior? , my opinion, no, I've seen the same thing happen to nordost Odin cable's, does that mean they don't work, absolutely not, my opinion, they are one of the hand full of best available cable's money can buy, the same can be said about these sr-black's fuses with everything that I have specified here, it's my opinion that the sr-black's are also in the few of best available money can buy, may work, may not, some component's will improve, some component's will not improve likely because the design will not benefit from high end fuses, at the end of the day, the sr-black fuses remain some of the best available fuses money can buy.