Started foaming in my Jeep preparing for my next setup (forward facing bandpass) :
* Drivers side fully foamed in and enclosed
* Passenger side fully foamed and enclosed
The above made my SPL drop hard with the current box, although, I need it for the new setup... so we came up with an idea in the mean time.
* Mini skateboard ramp !
* Another view
This brought my peak SPL back to where it was and my efficiency almost back to where it was. Too bad I never tried the ramp before the foam... I thought about it but never got around to it.