Distance from port to back wall

[CadillacMatt 10+ year member]

I realize this has been discussed a lot, but I usually find many answers to this question.

The general consensus of 1/2 dia. of port distance from the rear wall is acceptable, right? I just wanted to get some second opinions before I chop my port tube down any.

As it stands, I will have anywhere from 3.5" to 4" of distance to the rear wall, would this be fine for an 8.75" port? I realize it's a little less than half of the port diameter. The back end WILL be flared, if it makes a difference... and it's an 18" woofer in about 6 cubes of space.

Thanks!

Pic: This is the setup, port hasn't been trimmed yet.

Click to read more...

 

[RAM_Designs 5,000+ posts]

Should be ok once it is flared. And I hope you're adding some bracing if you're throwing a Nightshade in there.

 

[CadillacMatt 10+ year member]

Should be ok once it is flared. And I hope you're adding some bracing if you're throwing a Nightshade in there.

Of course, box is still under construction

 

[RAM_Designs 5,000+ posts]

Of course, box is still under construction

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[Buck 5,000+ posts]

We did 4 3512's in a Tahoe and the port was only about 2 inches away from the rear wall. It definitely still got loud. You could always just see how it effects sound just by moving it back and forth.