Quartet analog output specs.

I am wondering about the 6 analog out's on the Quartet. I had two mic's hooked up, using pro tools could see the levels and could hear the output with my headphones on the outputs and in the headphone jack. I ran the TRS to a self amplified speaker made by Mackie and there was no sound. The Mic's could be plugged directly into the Mackie and would work. Is the output just line level, or can it drive a set of speakers like the Apogee documentation states.



Thanks,



Steve.