Amplifier and Speaker A/B switcher

What is your equipment? There is a place to show photos and ID you equipment under virtual systems. This will help a lot in answering your question.

It depends on your equipment. The better it is, the less likely there is such a thing. I have tried a couple of very high quality (one was Rotel ((?)) ), (very heavy duty mechanical switchers and the degraded the quality significantly. 

OP,

Switching the banana plugs is certainly a good way to assure no impact  on sound.

The higher resolution your system, the more prone you are to hear a switch box. Given your equipment, I think a high end audio switch box, would be indiscernible in your system and be more convenient. 

OP,

Cool. Tell us what you think after you have some experience with it.