I am in Orlando and there is a shop that my friend owns and runs and it is called Audio Excellence. Anyways when I was there the other week they had a customer's car and it was an old classic sedan. Anyways it had three 10s sealed and there was a port on the rear deck. When I asked them about it they told me that it eliminates the rattle in the trunk and fires the bass into the cabin.

Has anyone know what is the true nature of doing this besides tearing up the rear deck.

Thank you

Ebrahim

You dont always have to tear up the rear deck to achieve that goal, you could also put the port firing forward as well.

Where the subs firing forward into the cabin of the car?

My guess it does release alot of pressure in the trunk and shoots through that little port?

I should do that with my car.. one day..

Well this ride had three ORION HP 10s receiving 500 watts rms

if the rear deck was completely sealed from the cabin it would.. Box and ports would have to be sealed very tight, with expanding foam.

I had an old '88 Bonneville many years ago. It had a thick rear deck board material with basically flooring carpet over it. The car had a place for 6x9's in the rear deck, and the rear deck board had some slits where the speakers went but the carpet covered them.

One day I got bored and decided to cut out the material above the 6x9 openings. Just doing that little modification made a significant improvement into the amount of subbass that transferred to the cabin, I'm going to guess because there was less restriction to the airflow.

I had a 87 Monte Carlo SS with 2 sealed 12's back in the day and I cut out 2 10" circles of the foam out of the rear seats.

It made a nice difference in low frequency in the car.

All depends on the car. E36 BMW's are notorious for eating bass, drop the seats and WOAH! Mine was nuts that way.