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RE: Division of labor in PA system-More

I owned my own PA&Lighting rental company for 25yrs doing everything from clubs to festivals to concerts to churches to fairs and so forth.

For the last 12+yrs I have been in the install side of the industry designing sound systems.

In a typical install the SPL across the freq band will be the same at the rear seats as it is at the front seats.

So you figure out how loud it needs to be at the rear seats and the distance involved and go from there.

Indoors you will need less bass cabinets to match the tops than outdoors.

This is because the bass reflections off of the walls will help to reinforce itself. Think of it being "contained" in the building instead of constantly expanding outside.

Outside you generally need at least twice (if not more) bass to match the tops for the same sound "experience".

A lot of this is very scientific and a lot of it is "seat of the pants"/experience type of thing.

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