If he replaces the entire woofer, wouldn't it be best to change out the other one too even though its not broken? Just curious to see what your opinion is.Hola Vitelli30,
Martin Logan does not make any woofer. A substitute will work with no problem. Wait for their advice. Also, there are repair speakers shops, where they change the coil or the woofer suspension. The coil is an exact replacement with the specs of the coil. Do a Google search for woofer repairs and that's it.
Provide the brand and model of the woofer and ask a quotation.