The oil can caps were historic 4.0 Cornell Dublier, 1,500 volt that I had piggybacked 0.69 ClarityCap, 630 volt, to make up the difference for comparison.
This afternoon, I removed the Audyns and put in the Mundorf EOV Oils. I use 5% silver solder, and before things were just alligator clipped in place on a 20 foot switch cable. (Hmmmm, maybe the alligator clip from the + to the Mundorf had a high resistance crimp and that could make it a bit quieter compared to the Audyn that was soldered in, even though I swapped the 20 foot switch leads.)
Later I listened to "Aja" (SACD), "Passion Play" (CD), and "Tank/Lucky Man" (CD) and heard none of the hash, though I'm betting some cuts will still exhibit some. "Tank" is a real "go to" for me and the soundstage and imaging are really wild if your system can do it. On some systems, it just sounds like noise.
But the Audyn may have been experiencing some High-Q resonances as evidenced by the way the RTA increases in various areas. If this is in fact the case, isn't it also possible that those caps that go to ground also experience this and if so, could lead to a "wavyier" roll-off? Would it accomplish anything to subject these "by-pass" caps to a similar "DC treatment"?