Is Bass Non-Directional In A Two-Channel Rig?

Theaudiotweak - I wasn't thinking of adding a third sub as much as wondering if you had done the same experiment with a single sub in a different location to see what people perceived about the listening stage.

No I have never tried that. It would be mixed mono and not stereo and there would't be the close chance of aligning the voice coil of the mains and the subs. I have used a single sub of the same pair while I was doing a mod on its mate. The single playing sub was not moved and I could hear where it was placed even in mixed mono. I think at that time it was the Paradigm Servo 15 pair. They always have flanked the mains. Tom

I'd be interested to know if your test people that evaluated the soundstage difference would have different results using a single subwoofer. I suspect your ability to pinpoint the subwoofer is much better than even the above average Joe.

I have had a number of people be part of this demonstration some listeners with a great deal of experience others who think an I-Pod is highest of fidelity. None however with just a single sub. Tom

How can you be sure that the difference in soundstage results from having two stereo subs located as you have them and not just a result of any sub placed anywhere?