getting bass from trunk to car? Saeled trunk ?

[dkc62 10+ year member]

I've been browsing the gallery and I've seen some nice installs. Some of these puzzle me when the trunk is sealed off from the rest of the car. How does the bass get past all the mdf or plywood wall that's between the trunk and the rest of the car.

Here's an example

http://www.caraudio.com/gallery/showimage.php?i=5751&c=2

And here's a qoute I read off of AudiQue that makes perfect sence to me.

If you plan to use a rear firing setup in a trunk car, make sure your box doesn’t seal off the trunk from the passenger compartment. You need to leave some space for the waves to pass back into the interior of the car. Either make the box as low as possible so the wave passes over the box and enters the cabin via the seatback and rear deck, or reduce the width of the box so the wave can pass to the side and into the car’s interior. A big, giant box may make your trunk extremely loud, but all you’ll hear is muffled rattle if the box takes up the whole space behind the rear seat and under the rear deck.

Explain.

Click to read more...

 

[thatkidbob 10+ year member]

bass goes THROUGH solid objects.

that said, flipping down your seat, taking your 6x9's out, and allowing space around the box and the car's interior increases the amount of sound in the cabin.

 

[dkc62 10+ year member]

bass goes THROUGH solid objects.

Yeah but I would think more bass wood go through open space and even more with the seats down.

 

[thatkidbob 10+ year member]

i don't know much about the pyshics but i'm guessing this is path of least resistance type stuff...

less energy expended moving through open air than through solid objects.

 

[dkc62 10+ year member]

I have a 4cf box in my trunk but I have enough space on each side to allow bass to travle. When I fold down my seats I can even hear a greater bass responce.

Well we'll here from more people concerning this subject.

 

[dkc62 10+ year member]

Got stumped?

 

[PatFitz9 10+ year member]

yeah, bass does go through solid objects, but it goes through air easier //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif thats why SUVs and hatches are louder than trunk cars. but even with the box not leaving much room in the trunk, you will still hear bass.

 

[dkc62 10+ year member]

So people build systems like the pic in the link I posted just for looks. The only reason I would ask a question like this is because I see a lot of cars like that.

 

[helotaxi 5,000+ posts]

The box in that pic stops about 6" below the rear deck it looks like. Plenty of room for transmission of subbass into the cabin with the rear seat down or to vent through holes in the rear deck.