Synergistic Red Fuse ...

The "quality control" issue here is the human ear and how different people perceive things differently.

I'd put my money on what p59 said.

Its not exactly "hit or miss."  I one were to read through all 21 pages of this thread, one would find that the vast majority of posters have had a positive experience from these SR fuses. 

I would not pay hundreds of dollars for what I've heard so far.  So not a hit here quite yet.   

bondmanp:

Congratulations on ordering a Synergistic Black fuse. If possible leave it on 24/7 for 3 to 4 days and then do some on and off cycles. Then over the next week let go of listening to this or that change and just enjoy the music. 
with a 30 day trial there is not a need to be in a big rush .

gbmcleod:

In the past I had a PS Audio Power Plant Premier. I find it fascinating that these PS Audio products that regenerate a " better quality power current" respond at all to changes in incoming power cords, what type of footers they are on, and even fuses. But they do!. There is a significant sonic difference in the changes in the RED versus Black fuse.  I am glad you have added to our fuse knowledge data bank about the best sounding fuse in a PS Audio Power Regenerator.

aolmrd1241:

Actually the reported improvement rate using either the Synergistic Research RED or Black fuse is extremely high. In most situations people have found the RED fuse to be a significant improvement over a stock fuse and also an improvement over other aftermarket fuses such as Isoclean, Furutech, etc. I think it is interesting that the Black fuses  in the nine (!) audio devices, I have installed them in have all had a major improvement in the sound. Each component was tried with stock fuse, then RED fuse, and then Black fuse. All fuses were broken in over 100hrs . All fuses were checked  for best insertion direction. I was meticulous in this process. This approach required putting an extra 300 + hours on the  KR PX-25 Tubes which cost about $800.00

The RED fuses is much better than a stock fuse and the Black fuse gives an even greater change. 

With the Synergistic Research 30 day return policy I think this is the most fun and rewarding upgrade an audiophile can do. No matter what the outcome you learn a lot about your system's sound. If you do not like the change you send the fuse back.

David Pritchard