I just bought a PB12-NSD, currently have a Velodyne F1500.
Laminate floors and 100% drywalls.
What should be Sub1, and where should I put Sub2?
Follow AustinJerry's excellent guide:
If you don't have room measurement equipment, the subwoofer crawl is the best way to place the sub. Corner loading will provide the most room gain, and the PB12 should have plenty of output for your room. So plop the sub on your couch, fire up some electronica, and crawl around the walls and corners of your room until you find a spot that provides the best bass. Put the sub there.