Has it occurred to anyone that people at the back of the hall are there for a reason?

Not everyone WANTS to hear the music front and center. Some of them want a quiet, intimate conversation with the hottie they just met! Some have hearing problems that make them sensitive to loud sounds. Some just came to eat, and weren't really interested in being 'entertained' while they chow down.

And all this while SOME of the customers want to get down and boogie on the dance floor!

In over thirty years of performing, I never had a customer or club owner come up and go 'you aren't loud enough in the back of the room'... But I've heard 'Can you turn it down a bit, we can't talk at the bar' enough times!

I agree that in a low volume, mild dining conditions environment, the PAS with it's ability to spread evenly is ideal. But don't assume that that is what everyone NEEDS... Some of us are still rocking in the free world!
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An arranger is just a tool. What matters is what you build with it..!