Is the 1/4 Jack on the T Series receiver a Balanced or unbalance output? Can I plug it into my Mackie 1604 on the low-z mic input or does it need to go into the line input?
The T series receiver has an unbalanced microphone level 1/4" output. Since it is microphone level, it would have to be plugged into the mic input of your Mackie. You will need a 1/4" to XLR-M adapter cable.