Hi Alex,
I still own two Eon power 15.
I listened to the Mackie a few month ago and must agree, that the sound was quite a bit better. The sales tech however told me, that at higher output the JBL sound better since they have a 15" driver compared with the Mackie's 12" driver. I didn't have a chance to verify wether this is true.
According to your post you state, that you did crank up the Mackie with a clean sound?
Thanks for your reply,
Eric