Now for the nitty-gritty.
First as Parker16 has stated, the capacitors are 35+ years old and should be replaced. They actually are 8 uf, not 5 uf. You are going to have to take the speakers apart, unfortunately as these models tend to have a couple of problems that need to be fixed. I have repaired 4 pairs of these so I perhaps am not the absolute expert, but I am experienced with the subject.
Problem number one involves the woofer and in particular, the terminals. Almost half of the woofers I have seen have had one or both terminals fall apart. The flex wire going to the voice coil might be dangling with some rivet collars and insulators. If they do, let me know. I have developed a kit for fixing these and I could sure help you out with this. Some soldering skill will be required as well as steady hands and some patients.
Problem two is the capacitor. If the driver is an H086, by Seas, then it is the correct tweeter. That tweeter has an 8 uf, 50 volt capacitor with a coil in its circuit. Replace the cap with the same value, but increase the voltage to around 250 to 400 volts. check the small coil connections as well.
The third thing to do is clean the 3-way resistor ladder selector with Caig de-oxit 5.
I also have had the glue on one tweeter fail. The components on the back of the tweeter flange will look off-center. What holds the assembly together if the glue fails is the magnet! Hopefully that is not the case for yours.
Sounds like a pain in the ass, right? It will be worth it. By the way, these are true "bookshelf" speakers and need to be about 1 foot or less away from the wall, about 8 to 10 feet apart. If you have a Van Alstine amp, that would be a nice match.
W
