Enter the Denon DHT-S316, which delivers a stereo soundbar plus a separate subwoofer bundled into the mix too. That'll cater for your bass, your mids and highs all in one swoop. Job's a good'un.
If you cannot find this documentation, contact the manufacturer to ask for it. If they do not provide it, you will have to intercept the MIDI messages other DJ software uses or guess and check to ...