I am curious which sub you are using. Don and I have had great results with Rythimik sealed subs...I believe Don's are sealed....I know mine are :-)
Just for reference, I own 1.7's driven by an Emotiva XPA-2. I cross over to my subs at 50Hz for music. The Maggie Bass is much too beautiful and articulate to "hide". In my opinion, and mine only, a 200 Hz crossover will rob the panels of their extraordinary upper bass. Again, just my opinion in my little room.
Oh and I believe you can audition the 1.7's in your home too!
Welcome to the forum!!!!!!!!!!
Have Fun and Enjoy the Maggie Adventure!