If this is temporary and you don't mind something 'gangly' looking, how about one Radio Shack #275-1537 for a one-to-one speaker comparison? Buy two for stereo comparisons, or you could buy several to compare a whole surround system. They're about $3 each. Just don't have them laying loosely around each other where conductors could make unintended contact. Also, while the 7100 could probably handle load-open-load switching, I'd recommend going to mute while you throw the switch(es). There are some other switches with better asthetics, just do a "switch" search at the RS website. I'm sure you'll be careful with the wiring - no shorts, right?

[This message has been edited by bestbang4thebuck (edited October 04, 2004).]