Thanks! A newbie question: since it has two inputs and 2 outputs plus a sub output, where does it go in the chain of equipment? Maybe from the pre-amp/pro sub out and out to the sub (low level). Could it go between the pre-amp/processor and amplifier(s) for the front mains using the other two outputs? If the sub will reach below 20 Hz, is there a unit out there that will equalize below 20 Hz? Thanks again for the suggestion.