How will I know when a Krell KSA-80b needs to be recapped?

PS: there are also a few other smaller electrolytic caps around the input/driver board that should be done also at the same time. 

Cheers George

Great amp but getting old now over 14 years, depends on how many turn on cycles it’s had, but I would do them.
You can get say Nichicons same voltage and maybe even more micro farads for around $100 each, you need 4 of them. Make sure the diameter (to fit the mounting clamps at the bottom) and height (so it doesn’t touch the lid) is the same. If your handy and know + from - you could do them your self no soldering, everything is bolted, in around an hour.
http://www.audiotecnico.it/riparazioni/riparazioni_K/KRELL/KRELL_KSA80/immagini/KRELL_KSA80_power.JPG

Cheers George