This was mounted under the drivers seat in our car. It really added depth to the lower-mid and bass end, and made the overall sound of the system sound more balanced and real. The remote adjustment is very convenient although it makes you want to tinker with the bass mix on each song, just because you can. The bass is tight and very well controlled at normal listening levels, but if you want people to hear you in the next county these aren't for "boom car" enthusiasts. Good quality, compact, and superb value.