The SBM is used in Home Theater systems that are either in smaller rooms or systems that have full range main speakers. For movie effects or when your main speakers can be and are called LARGE, the placement is flexible, often best in a corner. If your mains are going to be called SMALL in your Home Theater processor, you should place the subwoofer up front near or in between the main speakers; because on music, the main speakers and the subwoofer need to be about the same distance from all listening positions or you risk losing some of the notes in some locations. Two SBMs acting as speaker stands for Walsh Shorts is a cost effective technique to get the best for music and movies. These MicroSubs are the only speakers we have made for us in China (we still modify it to work better with our Walshs). Every other speaker is proudly made here in Brooklyn, NY.
You choose the model for the room size (using two doubles the room size). The impedance, sensitivity and distance do not apply because they have their own amplifiers.
These subwoofers can be veneered with the same veneer as your Main speakers.