I'm surprised you got as much output as you did at low frequency!
I doubt that's accurate data.
VV - look up how to take a near field/far field merge measurement, or ground plane measurement. Otherwise your data below 300hz or so is worthless. Both are easy, but don't mislead yourself with innacurate data.
Otherwise the graph looks pretty decent. Might be a bit tipped up on top, 3-5K looks to be a couple db's hotter than the entire mid-band which could make them forward sounding.