Great summary article. Good background and lots of application information. Thanks! The article mentions piezo drivers that are usable down to 800 Hz. I have seen them listed in the PE catalog, but had never taken them seriously. Seems like they might be worth looking into. I am sure they won't replace the compression drivers by JBL, Eminance, etc.in many applications, but they could be useful in a home setting. Do you have any experience with these?

Regards,

Bob