i used to have th JC-1s, great amp, with tons of power.
i would not be too worried about dried out caps. the factory installed some pretty good caps, even on the earliest units would likely still be good, but if you want to put concern to rest, meas the ESR and cap values on each. that will tell you for sure if you are good
i would not be too worried about dried out caps. the factory installed some pretty good caps, even on the earliest units would likely still be good, but if you want to put concern to rest, meas the ESR and cap values on each. that will tell you for sure if you are good