I wouldn't suggest it, but of course it is possible.
You'll have to set up MS to play through your moto. Control Panel>Sounds & Audio Devices>Audio. I use to have my SB set up for both - one output went to my computer speakers, one to the mixing board and out to the monitors.
You'll have to be careful, tho, with your internal computer warning sounds. Some are very loud and if you have been mixing/etc. .... The sounds will be as loud as your monitors. Go through and pick the warning sounds for low volume or just disable them, leaving only sweet music through your new monitors, so you don't blow them.
https://soundcloud.com/a-pleasure-dome
http://www.bnoir-film.com/ there came forth little children out of the city, and mocked him, and said unto him, Go up, thou bald head; go up, thou bald head.
24 And he turned back, and looked on them, and cursed them in the name of the Lord. And there came forth two she bears out of the wood, and tare forty and two children of them.