Looking for a solution to get better sound overall in my 2002 Jeep TJ. I’ve replaced all 4 speakers with high end 5 1/4 Polk audio, in the front I’m using speaker pods in the dash. I’ve jammed some poly fill in the sound bar, and installed a brand new Sony XAV AX7000 which puts out 45 watts to each speaker. I thought that doing this I would be blown away by the sound, but instead, it just sounds disappointing, loads of highs, some mids, no bass whatsoever. I do not have a subwoofer, but I figured with this set up and the power it produces, I’d get more! Any ideas on how to improve?