It's loud, but I'm not throwing that much at it. The light was only when the double muff and odb were on at the same time, the head isn't really peaking, so that is what was confusing me. With the double muff, it is only two dials and they are only at a point of being just a bit louder than clean, same levels with the obd but has a volume knob, guess the gain is prob turned up quite high though.
I guess that is another question, is there an art to getting volume without affecting the effect sound, particularly on the double muff?
I will give everything a check over tonight and see if there is any resolution. Thank you for all your comments.