I just found some JBL L26 at a second hand store. They seem to be in great condition, except one of the speakers sounds like it's underwater. I'm new to audio equipment.
JBL L26 restoration and upgrade
Sold Price: Pair Of JBL L26 Decade 10in Speaker System - August 6, 0121 10:00 AM MST
JBL L26 speakers in good working condition | Reverb
JBL L26
JBL L26 Decade Speakers for Sale in Tacoma, WA - OfferUp