sparks12kv
Active Member
I've found a pair of A400's that are missing one mid and one woofer. Interestingly, the woofers are only marked with the date (Feb 29, 1984) and have square magnets, which I can't find any reference to. Furthermore, the midrange is open backed, while most of the other mids seem to be enclosed. The mid has a round magnet and again, just the date. Are these drivers used in any other models and what other BA drivers can I potentially substitute in?
