Do many of the speakered arrangers have separate control for speaker volume vs. line out volume?

I can see how the arranger's speakers might be useful as a monitor, but if you wish to turn it up or down, does that effect the main outputs, too?

I can see the whole point for a solo act, but as I primarily play with others (who DI too) i would need the arranger's speakers to play the main board monitor send, not just the internals (or I got to lug monitors as well, sort of defeating the point, once again)...

Be nice if there was a dedicated 'in' to arranger's speakers that bypassed the arranger...