Jerry had sent me 3 fuses upon my request. One for my Aqua La Scala (which already had one of the previous version beeswax fuses inside), and two for my Acoustic Imagery Atsah 500 amplifiers which had stock fuses in them.
Old vs. New BeeswaxFirst the La Scala. The difference between the old and new version of Premium Super Fuse was not subtle and took about 2 seconds to hear. MUCH more low level information was pouring through, and the clarity/transparency of the high frequencies was greatly improved. This was comparing to an already fantastic AudioMagic fuse inside an already amazing sounding Aqua La Scala DAC.
SHD vs. Stock FuseThe Atsah 500's fuse upgrade produced much smoother high frequencies, again with quite a bit more low level information coming through. More air and space was evident, speed and dynamics seemed to have gotten a boost as well.
Overall, the $525 spent on 3 fuses sounded like a major component upgrade. I had more clarity in the highs, a more liquid sound, with a wider and deeper soundstage. Granted the system is already pretty tweaked out and noise floor is already quite low, but adding these three fuses made me realize there is still more music locked up in the recordings, and the fuses helped release it. I highly recommend the AudioMagic SHD fuses. In fact, if you buy an AudioMagic SHD Fuse from Tweek Geek and you feel it doesn't give you more than a $175 performance upgrade, I will give you your money back.