first off the truck: 02 reg cab f150 with a single 10" MTX 6000.

I am looking at getting a new box for the 10.
I am getting a lot of cancelation with the windows rolled up.
When I roll them down it like doubles the bass.

My question is which box style, sealed or ported, has less of this cancelation effect in a regular cab truck?

I am looking at either building my own sealed box or buying the new probox superbass for the reg cab.

 

the box is not giving you that affect so much as the truck itself.

and you just asked the question that every car audio geru wishes they knew the answer to. if your deaden your truck you can make it better but it will always be there to some degree.
move your sub around untill you get the sound you like best in your truck

its part of the game i guess. as for your box. its simple. generaly a ported box will give more output then a sealed.
but a ported box NEEDS to be build for a specific speaker and tuned properly. ported also will lesson the power needed

sealed boxes are much more forgiving. but reguire more power generaly and like stated above dont give the same output.
some say a sealed box it tighter sounding. i can tell you that if you have a properly built ported box that you wont be able to tell the difference in sq. anyone that says different has never spent
the time to make a perfect ported box.

personaly i like sealed because
1. easy to build
2. smaller
3. i think with good subs and power they sound A++


i run four alpine type r 12s now in my supercab all sealed and love it.

meter in at 143.2db with X meter
would it be louder if ported? YEP
do i care? NOPE

so it all depends on your application. and the sounds your looking for

 

In any vehicle, if you roll the windows down the bass is louder.

 

I have the same problem with cancellation.
See the box in my gallery. The box and one 10 rock. Roll the window down and the lows increase like crazy. I dont think your gonna avoid the problem with a reg cab. I dont think a sealed box will do 1/2 of what this thing will do.

https://www.f150online.com/galleries....cfm?gnum=3714

 

There is a very simple and logical explanation for this effect and yes it will occur in any car regardless of how much damping material is there.

A sub moves and compresses air. Much more than you may think. When a sub is on it's outward movement it is causing a positive pressure within the cab of the vehicle. When the sub is on it's inward movement it decompresses the cab to a negative atmosphere reading. Now granted these compression and decompressions are minor in prespective but do make a difference. Now when you open a window, door etc. you are allowing greater compression since the cab essentially increases overall air volume when the sub is in it's inward movement. Now due to the shear speed at which a sub moves it is causing greater compression within the cab since there is more air to be compressed. In other words, when given a little extra extra air to compress your overall air movement increases thereby having a direct impact on your SPL readings.

Hopefully that is understandable to you guys, It is the simplest way that I know how to explain it anyway.

 

The S.S. Cgorris nailed it. It is pressure not cancellation that causes the effect.
Cgorris how are those planars working out? I need to improve my front stage.

Edit: Nevermind, I saw your other post about your kicks.

 

Norm,

ssshhhhhhh, that's our little secret.

 

HEY!!!!

Dont be all secretive on here with the audiophile success info!!

 

Nah, just teasing Norm a bit. No illusive audiophile secret being concealed. I just go by another name on another board, Soundsurgeon is my alter ego and Norm figured it out all by himself so I just like ribbing him a bit.

 

Maybe the solution is to "port the cab" of the truck. j/k.

 

Alag8r, I bet you could start a trend amongst the "bassheadz"
build you a prototype truck or car with some neat aerodynamic porting of the actual vehicle..... maybe some neon lights around it, lights that flicker as the bass hit, a way to increase the bass response (how Dr. Cg explained) without the hassle of rolling down the window..... man you're on your way to the bank!!!

I know... silly. I'm just bored tonight.

 

Actually the cab is all ready "ported" well it is in the ext. cabs. Behind the seat there are vents on each that are just covered up by flaps. They are there suposedly to make it eaier to shut the doors and the make the AC work better.

Haha...talk about being bored.