Any suggestions in response to your post would have to be predicated on your budget. But, generally speaking, if very high volume is a major criteria, your best bet is to get horn speakers -- Klipsch K-horns would be an obvious choice, since they are very efficient and will play at ear-bleed levels.
Personally, I have yet to hear any horn speaker that delivers what I regard as "great sound". I concede I have not heard some of the latest horn models, so perhaps others can comment.
Personally, I have yet to hear any horn speaker that delivers what I regard as "great sound". I concede I have not heard some of the latest horn models, so perhaps others can comment.