ok just got my dd1 in the mail and as you know with any new toy you have to play with it. i went to set my sub gains and my sub amp shows distortion before i even see a signal. i have the gain all the way down frequency all the way up cross over on my deck set normal 80hz low pass 90 high pass for mids, i can tune the mids amp fine but not the sub. eq is set to flat also. any ideas why it is doing this?