That's why I did it. You can see where I put mine on my Cardomain page. I made a "custom" subwoofer level control and put it in the dash where the cigarette lighter usually is.
It's chief attraction is it's sound vs. it's size for me. Really it's just an adequate sub-woofer -- but adequates all I need, lol. I don't have room for a "real" setup.
The picture of the level control is before I went to the white faced radio display I have now. The buttons are "LED blue" on the new 6CD face I'm using, with a white display.