Hello. Not sure which speakers you have but share my personal experience. I have a pair of JBL L100T's purchased new in '87. They were always just a tad bright on the high's but certainly listenable. Noticed this guy on eBay called the crossover chef , he makes upgraded crossovers for about 40 different speakers including all the vintage JBL's @ about $400 delivered. His ad lets you know it's a 3-4 month wait so that says something. I sprung , they arrived almost 4 mo later and are twice the size of the originals. Had a hi-fi guy help me install them and wow I now have different speakers quite an improvement. The high's are smoother , as is the midrange and more low bass without being muddy. Best $400 I ever spent.
Crossover and Wiring Upgrade
Has anyone upgraded their Sonus Faber crossover, internal wiring, and binding post? I'm a cable and amplifier believer as not all cables and amps sound the same. Using that same mindset, I believe that upgrading the crossover and internal wiring would also yield positive results and keep in my speakers longer versus upgrading.