Multiple amplifiers on pc

Hello, i'd like to upgrade my stereo equipment with some more speakers, however all ports on my current amplifier are allready in use.

So the easyest war to upgrade would be a second amplifier. My pc only has one aux out. Would it be possible to run a AUX Audio Mic Splitter 1 Male to 2 Female and then from there two separate 1 aux to 2 cinch on the amplifiers?