I have a JL Audio 300/4 amp. I know I can bridge the left and right channels but what about left to left and right to right to increase the power to my XR650CSI's and keep it in stereo? I am planning on buying a 300/2 JL amp but I would rather not buy 2 of them since I have a 300/4 amp. I would really like to keep it in use. Any help would be greatly appreciated.