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http://www.parts-express.com/wizards/searchResults.cfm?searchFilter=2200 uf
http://www.percyaudio.com/Catalog.pdf
http://www.mcmelectronics.com/browse/Capacitors/3829501
Thanks for the replies. All the ones I saw had 20% tolerance. Is this high a tolerance acceptable for filtering line-level audio? Do I need to get a carefully matched pair for left / right?
How much difference is there in price for a closer tolerance? How critical is the application?
Price - dunno. Application is to filter DC out of my portable player's "line out" for my headphone amp, so I'll be listening to them pretty directly.
Then I wouldn't put too much of a premium on tolerances. Either spend a bit more to buy closer tolerances or buy a lot of cheap pieces and sort them yourself.