[prerich]

Originally Posted by Sir Terrence

It might cause some acoustical problems in that location. Just because bass waves are omni, does not mean you can just put a sub anywhere. There are performance issues that come with the positioning of the sub within rooms. If the couch is far from any walls, it is likely you will experience destructive cancellations at the seating position, not to mention the lack of low frequency support. You may also have some timing problems with the output of the sub arriving before the mains.

Subs should be near walls to get the best performance.

+1