If your object is surround sound then you would definitely need an AV receiver. You could use an AV receiver in multichannel or 7.1 channel stereo mode for distributed audio too. Make sure it has a mode that does this.
Your can also use a stereo receiver or integrated amplifier with a speaker selector box. If the speakers are different then you would need one with volume controls to compensate for the level differences.
http
/www.amazon.com/Monoprice-108232-4-Channel-Speaker-Selector/dp/B009GUQZ9U/ref=sr_1_2?s=electronics&ie=UTF8&qid=1438967082&sr=1-2&keywords=speaker+selector+with+volume