The modern stereo system

I’m planning a similar system in my car. First of all, you’re better off with ONE 12” sub with a ported enclosure than two. A properly sized enclosure for a single 12” sub is about 2.5 cubic feet and for two you have to double that and having two is overkill in my opinion. The bass begins to drown out the mids and the highs to where they’re competing for air space. Also, leaving the package trays empty will not help with improving the bass. A good set of 6x9 component speakers will add depth and balance to the sound. In additionally, good sound deadening and secure wiring will aid in an excellent sound system. Finally a good equalizer will help improve the sound and balance. I hope this makes sense!