Quote Originally Posted by Altec Best View Post
Jeff I don't think GPA has the same cones you have on those.The 515 came with a paper surround.They would probably be re-coned with the cloth/pleated surrounds.Not necessarily a bad thing but if the cones are fine I would leave them.
Quote Originally Posted by jeffjmr View Post
Complication. GPA confirms no 515 original cones. So all 4 must be re-coned as 515Bs. Bs can be re-coned as Cs. Will ask GPA if I have the C option, but is this a good idea or just stick with Bs? Spec sheets warn that Bs midrange will suffer, but notes that "works great" in vented bass. Is the 817 a vented bass?
Original 515's your probably looking at 40-50+ years on the magnets.They would most definitely benefit from a re-mag IMHO ! But make sure you put a note in each box that you just want the re-mag and NO re-cone ! Providing the cones are still good in the first place.

Keep in mind you will incure some expense in shipping up and back !