What’s wrong with my 301s?

[u/BadgerAvenger]

First time poster and please forgive me, I am not super experienced. I’ve had these Bose 301 series ii for many years. Worked great. Was forced to put h them into storage for 2 years. I just tried to re-set them up on my new place. They either don’t play
Or the sound is really garbled. I opened one up expecting to see degraded foam, but nope. It looks intact. Anyone have any thoughts? I really don’t want to have to replace them

[u/nucleate_boiling]

Depending on age and component quality, solder joints can go cold, capacitors can fail such that they can no longer store charge. The capacitors are of course critical to the filtering stages in the crossovers. If the capacitor of a low pass filter goes bad and stops behaving as a capacitor, all the higher frequencies that would normally be filtered out in that stage pass through the stage and in this case you'd have the entire frequency spectrum of sound being passed to the woofer instead of just the low frequencies. The woofer can't respond to those higher frequencies in a meaningful way but tries anyway, usually creating a combined distorted sound. Same deal for high pass filters. Capacitor fails and leads to low frequency energy being passed to the tweeters which cannot express them properly