I’m about to push the button to get 2 SVS 3000 micros to add to ATC SCM40s.

@m669326 Did you buy your SVS Micros new? Had your room size been mentioned or if guidance was sought on the appropriate subwoofer for the room, I would have advised to go with SVS’ larger offerings. The 3000 Micro have good specs for their size, but they are intended for use in small and medium sized rooms at best. With a larger room, especially with vaulted ceilings which add to the cubic volume, it will require more out of subs to charge the room. My room is 18x23 with a slanted ceiling up to 18’ high. It is also open to another room adjacent. I owned a pair of the SB-3000 (not micro) and they could not perform with authority. I returned them in a week’s time and upgraded to the SB-4000. What a huge difference. Just some food for thought if you bought direct from SVS. At least their return and exchange policy are exceptional. 

Call SVS and ask them for setup help.

Yes, try one driver facing the wall, the other firing into the room,

unfortunately, anything bigger would require rearranging furniture and switching wives. I had hoped that adding two of these would make a big difference. We don’t need the explosions and rumblings from movies, we’re just looking for lower frequencies in music. Once they break in, we will see…
 

I talked to SVS and my wife. The former convinced me to upgrade to 2 SB3000s because of my large, complex room. The latter begrudgingly agreed to an experiment with the bigger speakers, reserving veto power. The best place to put them would entail moving a table 4 inches into the breadth of a doorway,. That was a firm no. I'll figure it all out when they get here.