Hello maprik! Almost every company uses cheap parts in their crossovers. Replace just about everything in the crossovers, except maybe the board their on, with high quality parts. Avoid ferrous metals anywhere in the signal path, including the connectors on the speaker wires. Test everything with a magnet, even the nuts and washers on the binding posts. It may sound exteme, but you will be pleasantly suprized if you do it. Be prepared to spend $100 or so for each of the left and rignt speakers. (If you have a surround sound system, do 'em all as finances allow.) I recently upgraded all the steely bits in a four way system and was stunned at the improvement. Enjoy the music!
Klipsch and Capacitors
I read a lot about replacing the caps in old Klipsch speakers. If a 40 year old pair of KG4s have never been used (new in box) would the caps need to be replaced? Just due to age?