I should have been more clear ... it is the subwoofers I want to get at Best Buy, not the switch box.

One thing I have noticed with groups of 4 or more in a listening session is the "AB" instant switching tends to annoy most of the people in the test.

We all want to be able to control when the switch is made. John will just be getting into a feel for speaker "A", and Norm, the guy with the control switches speakers, leaving John hanging.

I ran this idea past Ian yesterday - it's the type of blind test we have done at the last few GTG's - you listen to a bunch of tracks for about an hour on "A", then everyone leaves, speakers are switched, and the same thing is done with "B".

The participants take 5 minutes to write notes between the switch.

Yes, you lose the instant back and forth, but you gain a more realistic listening session. You also gain the ability for the listeners to move around - check how well both speakers did off axis ... closer to the front, further back ... etc ...