That's exactly what I was basing my comment off earlier, and it's still around.
http://www.yamahaproaudio.com/global/en/products/speakers/dsr_series/downloads.jsp then select the "DSR Series Frequency Response" pdf.
Like you say, not quite as easy to find as if they'd just chucked the graphs in the spec sheets or manuals like any sensible manufacturer...
Thanks. I hadn't seen that chart until you posted it. The graphs in the manual and brochures are for the top boxes.
I suppose that that chart is fairly close to what I got, (given they were each entirely different testing environments). The upper frequency roll-off doesn't look right though. The crossover point is 120 Hz. I don't know much about the FIR-X filtering, but if that were a Butterworth filter, the slope would only be -3 dB at the actual crossoxer point itself, (and -6 for a LR filter).
Oh well, either way, I did find what I wanted to know.
These little subs do sound great. Like Kyle said, they don't get the respect they deserve due to their lower wattage specs. Man, they are plenty loud and tight though, apparently because they have high driver sensitivity. I've used mine (2 single 18's) for several rock bands in small to medium size clubs and in every case so far, I've had more low end than I knew what to do with, (and I like to feel that kickdrum punching in the chest). They keep up with the DSR112 tops just fine. I may buy two more someday just for larger rooms.