I blew my first JBL Eon 15P playing keyboard with my band, got another one used and blew that too, they seem to give me the same problem.

Is the Mackie SRM450 is a louder speaker than the JBL EON 15P? It weighs the same but I noticed the JBL had a 125w and a 50w amp in it, where the mackie had a 300w and a 100w...this means that the speaker can get a bit louder, right? And handle my load with my band without blowing, hopefully. I don't play incredibly loud, I run through a very small power mixer and I had the JBL halfway up and the mixer about half-3/4s up.
Think im safer with the mackie?