Happy to help if I can! MultEQ XT32 will calibrate subs, but it will treat all of the subs connected to one port as a single sub. So, it won't adjust the volume of each sub to smooth out the response, but it will try to set the overall volume to the proper level. I forget if the 3008 treats both sub outputs as a single sub for Audyssey, so it might be treating all four subs as one entity. Because of that, I was saying that you could adjust the volume of the subs manually - but you could then run Audyssey for it to fine tune the equalization and the rest of the calibration.