I GO TO A CHURCH WHERE THE SOUND MAN SAID TO ME THAT BECAUSE THE ORGANIST KEEPS BLASTING THAT THEY KEEP HAVING TO REPLACE THE 15" SPEAKER!...I FEEL THAT THEY ARE USING THE WRONG OHMAGE OR RATING….CAN THEY USE ANY FULL RANGE OR BASS 16 OHM 100 WATT SPEAKER OR DO THEY HAVE TO SPECIFY SOMETHING ELSE?