sub transplant from civic to olds98 - no volume - trunk too tight?

[deznuts]

Basic system. Basic question. One can ascertain from the information supplied I am only looking for sound reinforcement - I am not into competition or any other shenanigans.

Transferred the following from my 96 Honda Civic to my 94 Olds 98:

12" Bostwick DVC & a sealed box sitting in the trunk. (don't laugh - it has worked well enough for me over the years)

Old school Rockford Fosgate 75.2 (circa 1997)

The sound is very muffled in the Olds trunk. I can hear the sub straining to make sound. As soon as I pop the trunk the full sound that I was used to in my civic comes back (inside and outside). I know that the olds is more luxurious and a lot of engineering went into reducing road noise whereas the civic had much more road noise. This Olds is virginal - no mods and everything is practically mint. I would prefer not modifying the car if at all possible.

So how do I get the full sound back?

Do I need to use a ported box?

Will I need to remove sound insulation behind the back seat?

Is there a way to "vent' the trunk?

I have a pair of older kicker 12's. Should I just throw a bigger box and more speakers at the problem?

I have removed the rear deck 6x9's hoping that would allow the sound to penetrate the cabin - no luck.

Click to read more...

 

[Chrispy 10+ year member]

Which way are the subs facing?

 

[deznuts]

Single sub. Box is basically cube shaped but the surface that the driver is mounted to is angled slightly. The Driver is facing up and angled towards the front of the car.

The box is shaped like this.

 

[deznuts]

Bump . . .

BTW I just realized the amp is not a Fosgate 75.2 but actually a 225.2 - I have it gained all the way down for my purposes.

Cmon surely someone has some suggestion?

I was considering ripping out the box and replacing it with 2 6x9 subs on the rear deck (like the Tang Band W69-1042J). I am afraid I would lose too much low end that way though.