I use active studio-monitors for regular listening, DJing and Producing.

My DJM 2000 is connected the the monitors via XLR.
For production and regular listening I'm using an AKAI EIE Pro which connects to the monitors as well via XLR. The monitors only have one input.

Now I'd like to switch easily between both audio-sources via a cheap switchbox or something similar. Any recommendations?

I don't want to connect the EIE Pro to the DJM 2000.