Recapping the crossover.
~95–97 dB (1W/1m), allowing them to play loudly even with modest amplification. cerwin vega at40 specs fix
Do not replace the original woofers with cheap aftermarket drivers. The original cast-frame Cerwin-Vega woofers are highly specialized. Re-foaming them preserves their original parameters and value. Recapping the crossover
If you can't find the part, can't do the repair, or simply don't want to risk it, there are plenty of resources available. Recapping the crossover. ~95–97 dB (1W/1m)
Because these speakers produce high bass, internal bracing can come loose, or the sealant around the woofer/midrange can fail.