They are still coaxial speakers as the components are still along the same axis. Kicker just gives you an option to Biamp your set up if you would like ( running the tweeters and mid drivers on separate channels). I called them about this issue when I got my KMTC9’s. Just run the leads for the compression driver and mid driver in parallel. They said this would still achieve a 4 ohm result. This way you can still run your two speakers off of the two amp channels.