Originally Posted by ClieOS
The stock Wima sounds like most film caps I tried, clean, sharp, dry, good sparkle and micro-detail but also a bit grainy in the treble. Tonerex on the other hand is richer, smoother, with better depth (film caps tend to sound flat). You lost a bit of the sparkle and sharpness, but in exchange the presentation is more musical. The difference between Tonerex and Simlic II actually isn't very big. They are similar in presentation, but Silmic II has a wider overall image and space. So in a way Tonerex can be considered a step-down of Silmic II.
Thanks for this great info, ClieOS. The swappable sockets are a great idea. Are they available at PartsConnexion?
I'm looking up the Silmic IIs on PartsConnexion as we speak, and they come in 2 voltage ratings: either 50V or 100V. Both caps are of the same size and dimensions for the 2.2uF units.
Seems either would work, but is there any bearing on the sound quality?
I've read in the past how the higher wattage models of certain tantalum resistors sounded better, but this is a different thing all together. Still, it makes me wonder if there's something about different voltage models that may be audible. Anyone experiment with it yet?
How did those Blackgates work out? I recall they didn't quite sound good, but that was a while ago, and it seems those BGs take a lifetime to burn in. I probably have some BGs sitting around in my parts box, but they may take too long to settle.
I finally got the time to solder my OPA627s onto my adapter boards. Very good. In an elevated league vs. the included chips. Very, very nice so far.
If anything, the bass could be a bit tighter. But maybe that will improve with burn in. Right now I've listened to them for less than an hour.
And I've only listened to them on the Audio Technica M50s so far. I think those phones have a slightly tubby/loose bass, so might also be a synergy issue with those.