Cut through help

[FarrisAudio 10+ year member]

I am doing a cut through in my 89 ford. It is a ported enclosure, for 2 15's. If I make the cut through hole fairly big, will i run into trouble with the back glass flexing, possibly breaking? just because there wont be as much metal below it.

Thanks.

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[Supergumby5000 5,000+ posts]

I am doing a cut through in my 89 ford. It is a ported enclosure, for 2 15's. If I make the cut through hole fairly big, will i run into trouble with the back glass flexing, possibly breaking? just because there wont be as much metal below it.

Thanks.

Well, obviously the bigger it is, the less structural integrity that back wall is going have.

However, if you are doing a ported enclosure, the cutout will need to be pretty large, and i would reccomend doing some kind of bracing or incorporating the front structure of your box into that cutout.

If you did a bandpass enclosure, you could get away with a smaller cutout (just enough area for a port rather than the whole face of a ported box.

 

[zierbox 10+ year member]

The easy way is to use ¾ or more MDF to build a reinforcement face plate (side-to-side top-to-bottom)

If you’re really worried about it use steel

 

[FarrisAudio 10+ year member]

ah ok. i can get flat stock from work, i was thinking of bolting a long peice across the bottom of my window.

 

[zierbox 10+ year member]

It hard to see in the pictures

I use tubing; 2” X ¾”

Flat material will still bow and flex

 

[KHARPS 10+ year member]

Hey Zier do you design those boxes as a regular ported design or does the front area make it like a bandpass?

 

[zierbox 10+ year member]

The first picture is a new Chevy truck with a bed-cut 3-12”

And it is a Band Pass; what see is the port going in to the box

 

[KHARPS 10+ year member]

The first picture is a new Chevy truck with a bed-cut 3-12”And it is a Band Pass; what see is the port going in to the box

Sorry I was referring to the bottom picture with the baffles in a V and the port in the back. Does the size of the area in front of the subs kind of create a 6th order bandpass effect?