Yep..and one thing to rememer when you go...the MASTER EQ may be set to OFF..NOT JUST FLAT...plain off. Many people have gone to the music shop to listen to PA after hearing the demos on-line and thought it sounded cheap/tinny...
When I got mine home brand new..I felt that way..until I turned on the MASTER EQ. It's default setting are no flat...but also as you said do need tweeking based on MANY things.
Once the Master EQ was on and set...WOW what a great sound thru my Mackies

Lee S.