@10tacle: Heh, no worries.
@vacavalier: QUISP!! Man, way back in my childhood there. 😀
@OP: I better clarify a bit better here. The answer I gave is correct for your kit, however it may not always be the case. As vac stated, the sats themselves aren't, but since the signal is first sent to the sub where it hits a crossover, taken as a whole it presents itself as a "full range" setup to whatever you are playing on.
The sub itself is playing the role of bass management and it's actually "setting" the sats to small (so to speak) by splitting the signal and only sending the mid/highs to them and keeping the low end for itself.
If you were to set the speakers to small in the settings and then set the crossover to the same frequency as the one used in the sub, there will be little effect. But if the setting is either higher or lower there's a chance you'll create a valley in the frequency response.
Edit: Odd, Vac's response is now gone.