Can I hook up two amps to the same speaker?

With respect to your question about wire -- yes, you can use high end wire with Elizabeth's switch idea. Most high end speaker wire comes terminated with spade lugs, so just make sure that the switch you buy can accommodate the size of spades on your wire.

Do you have an extra line level output on one of your amps and an extra line level input on the other? If so, you can connect them at the line level, assuming they are close enough together.

Elizabeth, are the switchboxes required to use as a safty feature in case both amps are left on? If one amp is off why would their be a problem connecting both spades directly to the binding posts of the speaker?

If you leave both amps connected to the speaker, the one powered up will likely damage the output stage of the one powered off. That's why you need a switch.

Also, if either amp uses tubes in the output stage be sure that the speaker is connected to the amp before powering up or you could damage the output transformer. No such problem with solid state outputs.

Ghostrider, I understand now the reason for the switch. One of my integrateds is tubes. Wouldn't you hook up the spades with power off for safty, anyway? Once the tube integrated is hooked to the swith box, powering up is not a factor, correct? It would seem that this, once the deed is done, to be a good way for me to have tubes and ss. I'm a little concerned that the switchbox is a kink in the signal--amp to speakers. Am I over reacting?