Synergistic Red Fuse ...

After two weeks my first SR black arrived.  I installed it in my Coincident line stage, where it replaced a stock fuse.  I did not detect any of the brightness or hard edge reported by others.  I noticed a modest increase in resolution as judged by the clarity of the German in Schutz's Die Sieben Worte.  A more significant increase in tonal beauty was noted.  It was one of those deals where you start running through music you hadn't heard in a while, because you just didn't want to stop listening. I suspected their might be a hint of increased air, but it wasn't more than a hint.  Soundstage and imaging were inconclusive.

I did not attempt to reverse the direction yet.  I plan on leaving the preamp powered up today and letting it idle.

Wig, I plan on replacing the fuses in my PS 9.0 and HAPZ1 next.  I hope the results parallel your experience with your MW Sony.  If all goes as expected with the preamp fuse, I will probably place an order for the source fuses in a couple weeks. 

^^^

As the great unnamed vaudeville performer said to his audience after the first song ..."you ain't heard nuttin' yet."  :-)

I installed a BLACK fuse in my Modwright Oppo 9.0 power supply three weeks ago. Sadly, nothing. Maybe a bit more blackness (pun) but I'm not sure.
Brownsfan, Please don't let my experience stop you from trying the fuse in your unit. You have a 100% return option so what to loose, frankly I am very curious what you think.
The RED in my VAC was stunning. 

Synergistic Research HFT (High Frequency Transducer) Anyone else?
If too far off topic please let me know and I'll withdraw this.

I just now installed 13 of my 15 sale pack of HFT's. 
Five years ago I installed five acoustic resonators Franck Tchang brought to the market. The idea and results from transducers or resonators or whatever you call them is something I am aware of and enjoy the soundstage they bring to my room.
I'm not 100% on placement now but find the forward soundstage much better in that there is a solid wall enveloping the area in a natural way. I can hear extension and depth over what was there before. There is more going on but I need time to listen. It is not easy for me to articulate in written form not exactly the most educated guy here.  Very promising!

Mid40s, which MW Oppo do you have?  The 105 is usually powered by the 9.9 power supply, not the 9.0.  Those two power supplies are very different animals.  At any rate, I have found the 9.0 to be very sensitive to power cords, so I would have thought the same might apply to fuses.   Wig claimed an OMG experience with his ModWright Sony 5400 when replacing the fuses with SR black.  I think both the PS 9.0 and my HAPZ1 use the same fuse.  If so, I'm going to buy just one and try it in both to see which gives the greater improvement.