basmicke said:But taking the line signal from the amps and straight into my Mac/Logic system I really can't tell much of a difference.
Are you running the XLR outs pre-EQ? If so, you shouldn't hear a difference because the amps then essentially become DI boxes, bypassing the control section of the amps and sending the signal straight through. If you're running them post-EQ, you should be hearing a pretty good difference, because that's when the signal goes through the preamps and tone controls before heading to the XLR.
5sg.
