Im trying to understand my guitar setup a little better. I have a guitar with the Anthem system and I have an AER Compact 60. The AER have an input impedance of 2.2 Meg (http://www.aer-amps.com/images/stori...TD_GB_1111.pdf)

My questions:
Do I need to use a Para DI between the guitar and the AER for best result?
What is the output impedance for the Anthem system?
I have to set the gain to 100% (max) on channel 1 on the AER, is that usual?