The main difference is in the input impedance of the mixer. Also, be sure that the phantom power switch is not activated for channels 1 and 2 of the Alesis or you could end up with some distortion.
Good Luck,
Gary 8)
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)