I recapped a set of Advent NLAs. Not a good idea. Mine came out OK but slightly brighter. I have some other caps
in mind for a recap. Google the subject extensively. Modern film caps have very different ESR compared to old
electrolytics. Thats were film cap restorations can go wrong. Almost everyone states that the recap brought out details,
air, sparkle, etc...I suspect that they are just hearing a "brighter" version of their original speakers. On the flip side...old caps can degrade and shift to a much higher ESR and can make speakers sound dull and lifeless. They are many opinions on which cap to use. Prices can reach hundreds of dollars. Many like the paper in oil (PIO) caps. Old Russian PIO seem to be popular. I would steer clear of old NOS caps though. They could be out of spec as well. Obligatto seem to get good reviews and have a reasonable price point. Beware of those KLH 6 tweeters too. They are fragile. I had a ton of KLH speakers...replaced a few tweeters. The solid magnet wire tends to break where it connects to the paper cone. I never recapped any of my KLH speakers. They were voiced on the "polite" side to begin with....very east coast sound. You would be surprised on how many
"audiophile approved" speakers use plain old electrolytic caps. Pennies for the small values and maybe a few bucks for the
larger MFD caps. Then again many audiophiles would immediately hate their very own gear if they ever took the covers off and realized that the manufactures used some Radio Shack quality parts in critical areas.
