Yes, I agree, mid base is your friend, and with 4" MB's in the dash your entire front stage is from around 300HZ and up. I never though I was missing any midbass until I installed a 3 way componet set in my doors. A sealed 61/2" a sealed 4" and titanium dome. this setup is night and day to just a standard door or dash speaker. Even if you purchase the best speakers around, it comes back to the enclosure. you need it to get the bass response. If you just like trebble just set up a pair of 6x9's on your rear deck so people can see the magnets, lots of trebble. The size is also important a 4" cone just can't move enough air to give good midbass, a 5 1/4 is better and running 61/2" you can usally/safely run your subs to 100hz or so and pick from the with the 61/2's. Depends on the music you like, Rap or heavy dance, you might want to move it up to 120hz. I use MB Quart too and love the sound from them.

Rock On.......