It’s funny how them junk infinity’s as some call them
still sound as good or better in some cases then what is being
produced today at 5 times the cost. Yes the crossovers was
a pain to work with but back in the early and mid 80’s they was state-of-the-art the art. The IRS beta can go against about any 30,000 dollar speaker made today. And yes you should have to rebuild them now hell they are going on 40 years old. So yes stuff wears out. I own a set of Kappa 9.1 series 2 and I would put them up against any speaker made today under 15,000 dollars.