JBL Metregon Question. Need Help

Hello everyone. My first post here since signing up! :)

I was fortunate enough to inherit a JBL Metregon from my grandparents.

Overall it is in very nice condition. Speakers are in fantastic shape. Wood is in very nice condition.

I connected my two channel stereo to the speaker connections
on the back of the unit and played a few songs.

I notice that the mids and highs work great. There is almost no bass coming out of the main drivers. You can barely hear them even when the bass is increased from the stereo.

I am guessing that the crossovers/capacitors need to be rebuilt?

I am hoping to find someone that knows JBL/Lansing equipment and can do the job at a decent rate.

Do I need to replace the components with NOS parts? Or is it safe to use any decent grade components?

I am really looking forward to reviving this and hearing some great classic sounds from it.

Thanks guys!