When using the looper on my line 6 m9 unit, I noticed that the playback volume is much lower than the volume I used when recording the first or subsequent loops. I have the loop “play†volume maxed out along with the overdue and hi & lo cut levels as well. The volume of the live guitar is much louder than the loop recording (again, even when set at max level). Having both at the same volume should be possible, but isn't. Also, tried running straight in m9 with nothing before or after, just an amp. Can anyone advise? My m9 unit is used. Could it just be faulty?