Looking for some help. I have Marantz 8802a, two Sunfire amps, Goldenear one.r for fronts, Goldenear two for rear, supersat 50’s for surrounds, HTR 7000’s for ceiling, and two HSU subs. Since Goldenear speakers have their own powered subs, I effectively have six subs running from the two sub outs from my Marantz via Y splitters. This works great but I have a standing wave at a low frequency. I have bass traps for all corners and acoustic panels on all walls. I am considering minidsp 2x4hd with REW to manage the subs. Here is my question: how do I connect the minidsp to Marantz? Do I use just one sub out from Marantz or do I connect the minidsp to both sub outs? Minidsp has two inputs and four outputs. Do I need two minidsp’s or just one to do the job? I have the minidsp mike and REW installed on my computer and have done a test that shows my room needs some correction. I am new to this so please be specific with any help you may offer.