Oh yeah, I recognize your nickname I think.
I have a couple of both the MCM and the PE version. (Obviously, I kind of like these or I wouldn't have so many laying around)
I have response curves of both and they are exactly the same. Not just kinda close, I can lay the response curve of one on top of the other and they are identical.
I didn't pay too much attention to what the specs said the boost Q was, I simply tweaked the values until I got the transfer function to look like what I measured. Note that there is a high pass filter on this sub amp too. Just compare the "electrical circuit transfer function" on the image I posted to the response curve Darren created here:
http://www.partsexpress.com/pdf/300-792f.pdf Darren's measurements look just like mine for both the PE and MCM amps.
In summary, I don't think it's a matter of knowing the boost Q, it's just a matter of knowing the transfer function. I'm a guy who would rather get real measurements than rely on specs that may not be accurate.