could this work? sub pipe?

[Sabby]

hey everyone
i was just thinking, what would a sub box with a PVC pipe sound like if it was a tube going towards the parcel shelf. and the pipe is opened at the parcel shelf. it sounds confusing, so i drew a pic.
i understand about the volume of sub boxes and the specs to the subwoofer.
its just an idea to get more sound into the cabin

[StoneX]

No, it won't work. Do you know how a ported sub box works? The sound from the cone and the port interact to create the sound... If they're vented into separate areas of the car you'll get a much reduced output and poor tuning.

Porting it throguh the shelf will make it quieter rather than louder.

[Sabby]

yeah i know how a ported sub works.
i see where your comming from.
cheers for the help

[StoneX]

If you want louder, you'll need a different box. Bandpass boxes, although hard to design, can be ported in that way as all the sound comes from the port... You'd probably need a pro to design the actual volumes of each chamber though to ensure it doesn't sound like crap.

[Not_An_Abba_Fan]

It doesn't matter where you point the sub as the human ear cannot tell which direction the sound is coming from below a certain frequency. The boot will act like an amplifier and you will get enough base into the cabin anyway. If you want it to pound directly into the cabin build a sub box facing forward and remove the rear seat.

[StoneX]

It does matter which direction it points... It doesn't affect where you hear the sound from but it does affect the amount of sound you eventually get into the cabin. If you have a sedan and move your box around and point it in various directions you can hear some pretty obvious differences. Especially if you open and close the boot in each position.

[garfa]

bandpass box, not sound crap? what? when did this happen???

[StoneX]

The right subs and the right design and anything can sound good People just say they sound crap because no one can design them well.

[garfa]

sorry stone, but just on the way in which a pandpass works i can not see how they sound good.
have heard a few, huge spike in spl, shouse quality.
i am siding with ray on this one.
if you know of a good one can i have a listen?

[StoneX]

You can actually have the cut-off frequencies wide apart so you have a reasonably flat response. You only tune the cut-offs close if you are tuning for high output (SPL). But as I said above, it's all about how you design the box... There's so many variables with the box that can be changed to effect it's frequency response.

[AG Canberra]

Try these - http://www.sasbazooka.com/productAutoPassiveBTsBT.asp

Were popular in utes about a decade ago - before most of you got licences I reckon!

Obviously the yanks are still buying them - cool to say you've got a Bazooka in you car though!

[fabz]

There is a Vt i think going around the robina area with 2 x chrome 90deg pipes coming from the parcel shelf into the cabing. They look like exhaust pipes but are then (when he opened the boot) were connected to a custom box in the boot. He said gold coast car sound did it for him and from my knowledge they know alot about audio. Was it lies?? is it possible?? It looked strange but sort funky at the same time. I cant find a pic but ill keep googling.

[StoneX]

Stores will do whatever the customer asks If it was a ported box, it's not the best idea. If it was a bandpass box, it's ok.

[IMCRZY]

There is a Vt i think going around the robina area with 2 x chrome 90deg pipes coming from the parcel shelf into the cabing. They look like exhaust pipes but are then (when he opened the boot) were connected to a custom box in the boot. He said gold coast car sound did it for him and from my knowledge they know alot about audio. Was it lies?? is it possible?? It looked strange but sort funky at the same time. I cant find a pic but ill keep googling.

Iv seen a car with a set up like this but instead of the pipes coming out of the box they were pointed towards the cone but about 10cms away and u could hear good sound inside the car....

[StoneX]

You would hear more sound with just open holes in your parcel shelf. Put grilles over the open holes so it looks like there is a speaker there and it will let more sound through than any sort of piping.

[Boonz]

or just fold the middle seat down...

[StoneX]

That too

Due to bass being such low frequencies, it can travel through soft objects like seats rather easily... The main material that stops sound is steel.