So does the SRM450 have enough low end for a 400 person wedding in a large room with no subwoofer? That's really my question. Looking at the SA1521z - it seems great but it doesn't looks as durable as the SRM450 or the JBL Eon, and it's an extra $200 a pop - I'm not convinced. Of course, I haven't heard any of these in action.....