That's a pretty accurate reading. \:\) The 20hz anechoic measurement I have is 98db at max output with the limiter kicking in. That corresponds to around 110db in room. According to these measurements, peak output is being DSP limited in 33hz zone at around 107db. All these numbers are consistent. Axioms numbers show peak output at slightly more at around 111db before the limiter, which would be more indicative than this one graphical measurement.

The first graph shows what's happening at max output near 107db anechoic just as the DSP curtails things. Interestingly the THD while high doesn't sound offensive since most of it is second order. Comparatively speaking much lower amounts of odd order THD sound worse, edgy and irritating. In any event its low enough as to not be audible though it gives the EP subs that pleasant "fuller" or "thicker" sound. The second graph is with anechoic output at 100db with THD well out of the audible area.

Note that even at max output the EP sub is maintaining a reasonably linear FR albeit at the cost of rapidly increasing THD. Where the DSP works is magic is to limit output at a very high level just before distortion becomes noticeable.







John