My HU (Pioneer 4600) is putting out 2.2v to 4- channel Profile Baja 740(4x60)RMS which is daisy chained to a sub amp (150)RMS (I only have 2 sets of pre-outs coming from HU)I am looking at an Audiobahn combo, Preamp, EQ and 8 volt line driver which also has a sub output.What will this do for me?