Ok lets say a person has a full set up Head unit 2-way components up front powered by a 2-channel amplifier Rear speakers powered by a 2-channel amplifier And 1 subwoofer powered by a mono channel amplifier. The person feels as if their mid bass region is lacking, could they add in something like 8 or 6 inch sub(s) and then just tweak the cross over networks so the original sub isnt hitting into the smaller subs region and the new subs are taking the remaining frequencies up to whatever. Then adjust the volumes for the amplifiers so there isnt peaks in volumes so the freq bands more 'roll' into each other. What are your thoughts on something like this and what would be required to put something like this into place? And rate the diffulculty level of something like this.