We're done! The X-Treme Audio catalogue has the sort of speaker you need for this kind of application: the XTD88 (and the XTD88/A active speaker). They are perfect for sound reinforcement: simply put 1 speaker every 3-5 meters. You will find all the information on the special page dedicated to them: here is the link: XTD88 Well, that's my job done; it's time for me to give my processors a rest. You can start over if you click "restart" or go back to the X-Treme website if you close this window. I hope I was of help. See you soon!