:It could be because the bose speakers are weird ohms so that they will work with the small stock amp's in the car. You may want to try taking the bose amps out.
It should not be the issue of the ohms speaker factor because i am not running from the amp on my HU but from pre outs Or the "rca" female jacks that come on Aftermarket HU So i am just sending un amplified audio signal to the amps... So idk i have been tearing through my car to find whats wrong which is a no no but still... UGH!