AR-2ax speakers here from 1966 still going strong and sweet! This was before AR fitted these with foam surrounds, so the original butyl rubber surrounds are still perfect. One mid range unit was replaced in the mid-70's ($9) with OEM; one dome tweeter replaced in 2015 (with perfect aftermarket unit from Parts-Express - $20); and 4 level potentiometers replaced with L-Pads ($30). Crossover caps are still fine. Woofer foam surrounds can be problematic after 10-15 years.