Preamp Output Capacitor: Mundorf Supreme vs. Supreme Silver Oil

Why do you need all these Mundorfs after using Miflex KPCU?
What was wrong with  Miflex KPCU?
Did you try Jupiter Copper?

You sure they're the correct values?

@imhififan If you read a lot of capacitor discussions, you can see some other people finding that the bass response of the s/g/o decreases over the first 300 hours (e.g. https://forum.audiogon.com/discussions/mundorf-silver-gold-in-oil-supreme-caps-any-good).

@noromance Yes, actually the original reason I started modifying the capacitors was because the miflexs were right on the edge of being too small for my amplifier's input impedance.

@alexberger Although the miflexs' had nice tonality, they presented a very flat image in my system. Adding in the Mundorfs put a lot more layering into the soundstage. It very much went from 2d to 3d.

Also, I just discovered the thread I cited above did have some s/g/o to silver in oil comparisons. It was hard to explicitly search for differences because the only difference in terms is gold (and people write out the cap names variably).

Looks like maybe supreme silver oils do have better bass.

@alexberger and I'll probably also try some Duelund tinned copper. Thinking about putting those on one output and one of the Mundorfs on the other.

Those Duelund tinned copper caps are so special. If you can afford those, they will easily surpass the Mundorf caps in every sonic area. I think you suspect that is true.  They are pricy!