It can be done, But..
Generally to accomplish doing so and getting it to perform and sound worthwhile will require 'pro sound' equipment of the sort you see at concerts. They have a whole range of devices and means to make those arrays 'do what they do'...*S*
@mijostyn has your best option, but level and balance control over the back pair (at minimum...eq added to that is a plus) would perhaps fill the bill for just sheer volume.
No guarantee as to what you may hear, however...*shrug*
Generally to accomplish doing so and getting it to perform and sound worthwhile will require 'pro sound' equipment of the sort you see at concerts. They have a whole range of devices and means to make those arrays 'do what they do'...*S*
@mijostyn has your best option, but level and balance control over the back pair (at minimum...eq added to that is a plus) would perhaps fill the bill for just sheer volume.
No guarantee as to what you may hear, however...*shrug*