burning in capacitors for phono stages

I'm in the process of auditioning various capacitors within my phono preamp. It seems burn in is a 'real' issue with caps. In exploring various means to burn in these caps I found the KAB PreconLP, this device converts line level signals to phono level signals. This allows one to use a cd player and burn in disc to burn in phono stages.

I only need substitute various caps in circuit I want to audition. This seems like a huge advantage over any other cap burn in method I've encountered. You are getting the actual signal your cap will see playing lps. Other burn in methods I've seen may or may not have sufficient voltage and/or combo of AC and DC.
Sns- Right you are about the sonic benefits of high quality caps and the fact that the sound changes after the dielectric forms it's charge(commonly referred to as, "burn-in"). I've always purchased mine(and Vishays) from Michael Percy. He will match your components to 1% tolerance(good for channel balance). An excellent selection of polystyrene/polypropylene caps too: (http://www.percyaudio.com/Catalog.pdf)
Here's something else that might interest you: (http://www.geocities.com/rjm003.geo/rjmaudio/diy_rack.html)
Thanks for the info Rodman. I'm using the burn in scheme suggested by Johnss. We'll see how that works.
Sns- There won't be nearly enough voltage to burn the caps in overnight that way(especially with poly-s, poly-p or Teflon caps), but- it would work eventually. Happy experimenting.
Rodman, I'm burning them in for aprox. 150 hours. I've heard in speaker crossovers the V Caps can take 400 or more hours to fully burn in. Eventually, I will get around to building the burn in scheme you suggested. Thanks again.