How do I hook this one up to my system, if I want to use it to find the best location for my subwoofer in my room? I only want to use its meausurement abilities, so should I connect it to the sub, amplifier or dac?
The various possible connection methods are outlined here.
If you only want the DSPeaker to correct the sub and not your main speakers, use the method titled 'Using Anti-Mode 2.0 Dual Core for subwoofer correction'.
But if you want it to correct the sub and your main speakers (which is what I do), you'll need 'Using Anti-Mode 2.0 Dual Core to correct a 2.1 or 2.2 system'.