It would be an interesting test if Axiom had a Denon receiver to play with. What I would suggest to them is to install into their showroom at the plant and calibrate it using a EP500 with the newly designed amplifier which has the gain set differetnly then the older amps to test if it needs a boost in the receiver settings for proper calibration. It seems people are having a harder time calibrating the 500's with the newer amps.
People are often hesitant when calibrating a sub to
A) increase the gain on the sub past half
B) increase the gain on the receiver
when "volume" is lacking