They probably do. I bought them more than 52 years ago. The original foam grills disintegrated many, many years ago. And the replacements also disintegrated as well. If I was going to use them in the house, I’d get new grills but……
Otherwise they are in perfect condition and sound great. They’re hooked up to my Sonos system through a Sony amplifier. In case you don’t know, they are JBL L100 Centuries, the home version of the control room monitors used in most recording studios of the day. The majority of the music I listened to in the very late 60’s and 70’s was mixed using those. Awesome speakers and still worth a bit of cash.