Subwoofers in a cruiser mopar

I don't have a sub in mine, but for the main speakers.....

I run Alpine 6x9s out back, 5 1/4's in the doors and I 3d printed some adapters to mount 3.5s to the defroster vents in the dash. I used the appropriate caps on them to block the lows. I am running the Alpine 445 Power Pack to give me 45 watts RMS to those speakers. It wires right to the Alpine head unit I have. My dash was already cut (poorly) when I got the car so I didn't mind putting a Bluetooth capable receiver in. I was going to install a Kicker bass tube with the amp built in, but my alternator isn't big enough. I didn't feel like replacing the alternator and the wiring to it to handle the increased load, but maybe at some point I will. The bass response now is pretty good, and already causes too many rattles that I am still tracking down.