Im breaking them in right now at 1/8 power and is already shaking everything. The subs ar facing me and its an 10 cubic foot box. The trunk is dynamated all ready with the foam stuff too. Also what can I do to increase db as far as inside and outside the car. Like dynamat support ect I wanna hit 150.

 

What subs, amps, electrical, and box specs (port area and tuning) do you have?

 

will come down to upgrading electrical so you have all zero gauge , also upgrade so you have a battery bank , upgraded alt , big 3 under the hood , paint the inside of the port so that its smooth for airflow

 

All done except alternator which I have a limited waranty on got two big batterys and a 5 farad cap

 

Upgraded atomic ele 4 1/2 inch voice coil 2 logics 40000. Almost 10 cubic foot box everything 0 guage 8 guage speaker wire 0 guage from alternator to battery two 73 pound batterys and a 5 farad cap might upgrade to a 35

 

39 hert port

 

If your not doing a 150db then there's something wrong with your enclosure

 

150db @ what frequency?
It depends on what do you want? what kind of car? what is your part exactly? and amplifier is important.

 

If it in a neon, tht should be an easy score, however that is a monster box so its not a neon!
What vehicle is this, because I couldn't get more then 4.5CuFt in my neon

 

First of all, theres no need to break in woofers.

Secondly, if you're concerned about db as in your actual score the best thing you can do is get your own termlab or similar. Or atleast having access to one to do as much testing as you can.
If you just want to make it louder to play music to your ear then you can adjust the tuning of the box to see what you like best. That would be the easiest way.
not really. Plenty of trunk cars can sound great on music and dont do well as far as numbers go.