LSQ still has all the features of SQ, just louder, it still has a properly set up front stage, and a sub that blends with the front and is not overbearing if you're looking for louder in the sub-bass regions with a decent sounding front, that's another thing entirely, and easily acomplishable well I want to accomplish that then. Sorry I am new to all of this. So where should I start looking? What I recommend for a system like that: decent HU 2 channel amp for components up front whatever sub stage you like with a matching amp and any sound deadening will also make improvements any of the sub set ups listed so far will easily accomplish the sub portion of this system, it just depends how loud you want it to be my 2 sealed 8s are enough for me, but there are people here running 4 ported 12s, how much do you want?