I'm tinkering with the idea of setting up a near-field sub-woofer behind the (single seat) listening position. The context is that in-room measurements that I've done with the microphone being 10 to 30 cm from driver has all shown near flat results - so I'm reasoning that this would be a simple method to getting near flat response and, at same time, reducing distortion as a result of running the sub at a lower volume. It seems as if the downsides are the odd looking arrangement of sub right behind the seat and potential for localisation - although the latter would seem manageable given that I'll be using a digital X/O at 60 to 80 Hz. Has anyone got any real-world experience with such a set-up? Or, accepting that this set-up won't work for a lot of scenarios, am I missing anything about it's application for a single set set-up?