Find a pair of originals and recone them is the best you'll do refoam them if at all possible but if the coil is bad.... the original coil is completely different as well and you'll have to Frankenstein it to get anywhere near the wonders of auditable joy those fantastic Advents made possibly the best speaker I've ever heard in my 47yrs of living... and to any who don't know the square had better performance, feq response, and sound largely due to the larger coil hidden inside.....and no way the replacements even come close though they may sound good they are not the original great.
