Hey I have a older model(maybe 3 or 4 years old)Sony xplod headunit 4 aftermarket component Interior speakers and a kicker comp s 10 I ch sub in a ported box, and a hiphonics Zeus 600w amp(or 1,000w, I can't remember right now). I AM. Not happy with the bass at all. Some songs it hits harder then others Some songs I can drop the subwoofer level on my headunit and it doesn't change the bass at all. I previously had the same amp and headunit powering dual 12 inch JL audio subs in a closed powewedge box and also aftermarket component interior speakers and I loved it . I listen to about 75% metal/rock. When I'm listing to the tuner I also get barely any bass even when I raise or lower the subwoofer option.