WEE Technology Company Limited - WEE are Capacitors Specialist

How does Hi-Fi Audio Component Break-In (Burn-In)?
Do new capacitors in a crossover need breaking in?
Capacitor Burn In: correct method?
How long they need to full "burn in"? 

Some feedback as below from different customers for your reference only.

Customer A:  "Need" is a strong term, but to my ears, new capacitors do change in sound over the first 100 hours. The most noticeable to me listening to Daytons break in is around hours 20-30. I didn't believe it either until I heard it myself. For lack of a better explanation they get less "harsh" and "smooth" out. I'm not an electrochemical guy so I can't fathom the why on it. 

Customer B:  In my experience you’re going to have to let it run for about 6-7 years continuously in order for the capacitors to truly burn in all the way and sound their best. It’s also better if you use classical music to do so because of how dynamic it is, it will really make a major difference.

Customer C: Normaly capasitors need some time to "brake in" or "burn in". Usually it takes about 100-200 hours. Some of capasitors need more - for exampel Teflon caps need over 400 hours.

Capacitor burn in, how long does it really take?

Customer D: Absolute nonsense. If a cap required 50 hrs burn-in to perform correctly that would mean the mfg designed it that way and would include that information in the specs. Anybody seen any cap specs that state: "Requires 50 hours burn-in to reach full potential."? Me neither.