Preamp Output Capacitor: Mundorf Supreme vs. Supreme Silver Oil

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).

@cal3713 ,Thanks for the link, I just wondering what cause the bass response decreased.

@imhififan Yeah, no idea at all. I didn't really believe it until I experienced it. Loved the caps for the first few days and then the bass just receded. I switched over to the normal Supremes and it was back.

@grannyring Finally sprung for the duelund cast tinned copper. These capacitors are absolutely amazing. Now I have them in my dac (audio mirror tubadour III se), pre, and speaker crossover. They just sound so natural. 

They are easily the finest sounding cap I have ever used and I have used most of them 🤪 They are as you say so natural and real sounding.   

I have tried a lot of capacitors over the years and my finding with the Mundorf Silver/Oil is the same as mentioned above. If they maintained the sound of the initial 100 hours, it would be one of my favorite capacitors for a warmer tone. 
The capacitor I like for good tone as well as maintaining good detail is the DynamiCap. We switch over to these in our upper end Purity Audio Design Reference and Statement preamps with the Statement being the Stealth version.
For clarity and more 'in your face' the ClarityCap CMR are a very good capacitor.