I have a Korg DT-1 Rack mount tuner. The input to the tuner is normally my guitar. However, I have a Mesa Boogie .50 cal head that has a variable level output. That can be used to connect the amp through effects units etc. Can I connect the amp to my DT-1 Tuner via the amp's variable power output, or must the input come directly from a guitar? If I can connect the amp to the tuner via the variable volume output are there any precautions I should take such as keeping the volume level low? Thanks, Mark.