I used the mic on the epic150 and I know it is not extremely accurate but most would agree it is within a db or so and regardless I used the mic for both before and after and it is a huge difference just by listening to it. I know its might be hard to believe that 1 15" with only 450w is hitting that db but I would be willing to bet it is for sure 140db plus. And besides it realy sounded like azz before so it wasnt much to compare it to. To those who may care it hit 145db today play chicago and im pretty sure I can get a few db more with alot of tuning and a spl track or burp.