How to turn off outside speakers on a Arctic Fox 811

Hopefully an AF owner might verify- or dealer/mfg.
But if (sounds like only a pair of speakers inside) the balance doesnt change power between the 2 inside speaker, means no left or right channel-no stereo?.
I could see using fader control either outside or inside. But description makes it sound like speakers are split inside/outside by either left channel or right instead of front to back-which I would agree wrong (if its stereo). Odd