Should I mic my amp or use the line out for putting it through the PA system?
Using a mic will capture the sound of the speaker as well as the amp’s tone. This is important as manufacturers spend a lot of time finding speakers that compliment particular models. This will also allow the PA to reproduce the sound you hear more accurately. The disadvantage is the extra expense of the microphone as well as having a live mic onstage to worry about. Many line out tend to sound thin although there are some that are very good. Experiment, you may find that you like the sound of the line out and since it’s built into most amps you can do it right away with only an extra cord.
