Just found my 35 year old AKG240 headphones. Soldered on a new jack and they sound pretty nice.
Would it be worth my time to shop for new phones (under $100). Could I expect better performance?
Any opinions welcome. Thanks
Make sure that the inner ear side discs, which are separate and not attached to the pads, are in ok shape. They are a fabric covered thin foam layer that deteriorates over the years and gunks up over/in the driver. This affects the sound after the foam integrity condenses and crumbles into uneven harder areas.
You may have to pull them out and check that nothing has fallen into the driver area. I simply removed the foam from the fabric with a vacuum cleaner then replaced the fabric itself on some K240M.
You can get exact replacements cheaply for them from places that sell AKG pads. I know Thomann.de carries them, never bothered to look locally . These are most likely for newer ones but it should be sonically no different. http://www.thomann.de/gb/akg_schaumnetzscheibe.htm
Post up some pictures when you can after a few more posts the site here will let you do that.