Trentpancakes- That's what you call "teeing it up":) I have done SEVERAL "turn on- turn off" listening tests. 20+ times. Every time the listeners heard a significant difference. The truth of the matter is that it drives me crazy doing this. You want to make sure that after you turn them off there is no residual effect and I feel that there is but not sure exactly how long 5, 10, 20 minutes....hard to tell for sure.
I feel more comfortable loaning out the devices (I have 5 energizers and 4 panels in my studio) for people to take home in an environment that is completely familiar to them. I also will bring the devices to peoples homes to try, BUT I think it's best if someone can keep them for an evening or even two days and play with them without a "sales person" sitting there. Personally I like to listen to things by myself to really tell what is going on.
BUT after saying all that, if anyone wants to set up something at my place just get in touch and we can figure something out.....of course everyone is always welcome, regardless if they are buying something or just interested in looking and seeing something that I happen to have on hand. Best, Bob