Quote Originally Posted by VolvoHeretic View Post
Make sure you place a 1/4" spacer between the front baffle and the woofer as has been told to me by people that know to eliminate woofer excursion bottoming out.
Hmm, if you hit the baffle with a vintage Altec horn or MI driver, then you're so far past Xmax that you run the risk of the VC bottoming out and/or leaving the gap completely if a spacer is used and eventually it will most likely ruin the VC, requiring a re-cone. Spacers became required when folks got tired of blowing up Altec drivers with too much power and switched to JBL 2035H or similar before Altec came out with their own high power versions that required them for prosound and extreme HIFI apps.

I'll probably have a heart attack if I ever see the 515Bs move that much.

GM