Do I need another amp for a sub-woofer?

[derickveliz2]

I know it's hard to answer, we are putting better speakers with more power in the front doors, this is not optimal but what can we do, if that means building a kick panel? I really don't want to go in that direction, I admire sqcomp putting an 8" speaker in kick panels, that's for sure going to sound really good, but our cars are so small that for me it would be kind of "in my way", going back to my question... it would be nice if our deadening treatment helps to reduce the music level outside.

I dislike those cars with the trunk rattling too, it's embarrassing if that happens to me.

Thanks.
D.