[Wayne A. Pflughaupt]

Wow, the extension of those things is impressive! I need to get me some.

It looks like you'll be applying a single set of filters to both subs. As you can see, the "green" sub is dominating, which means that what I'll call "global equalzing" will drive the "red" sub's level further downward between 20-60 Hz while the opposite will be true between ~60-80 Hz.

There has been some discussion here recently about whether "global" EQ the best approach for seperated subs, or equalizing them seperately. A number of years back I had my subs separated like yours, and it drove me nuts. I was able to localize them from the air pressure they generated to my ears, and that did not go away until I had tweaked them within a dB or so of each other across the full operating range, with 1/6-octave sine waves. It was a grueling, time-consuming process, as I only had 1/3-octave EQs at my disposal.

Others here like Sonnie have been happy just equalizing multiple subs globally, as a system. So if you're happy with the results of global EQ, enjoy! That's much more fun than constant tweaking and fretting!

Regards,
Wayne