I have a dsp.2 in my truck now. It sending out signal to a 3 way plus sub. Sub is being ran off a 2 channel amp bridged. I have some small speakers laying around that I have been debating on using as rear fill. Right now channels G & H are summed together L 50 - R 50 L50 - R50. Would it be possible to use a Y cable from channel G to then 2 channel amp for the sub and then another y cable from output H to another small amp for differential rear fill?