The sound pressure level from the ETX18SP and ETX35P combo hits you very hard, they move a lot of air, as your chest feels it before your ears hurt. I was able to play whatever I wanted for more than an hour on this combo. Yes, I wanted it bad, but it does not fit the ability scale I am trying to keep. I would only do 2-3 gigs a year for that set up, that is why I bought more of the smaller ETX.