MJ-18 Box. Design Addvice/Tips/Changes

[grimreper912003 5,000+ posts]

Its 5.21 cu ft after Port displacment. 74 Sq in of port area (18.5" x 4") Tunned to ~30 Hz

My goal is to get pretty loud, get pretty low, and Move a decent amount of air. The vehicle is a 1994 Chevrolet Tahoe 2DR. Will be getting about 800w RMS. Let me know what I should change if anything. Thanks!

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[grimreper912003 5,000+ posts]

anyone have advice? I know theres a couple MJ18 guys out there.

 

[Rashaddd 5,000+ posts]

More port if you can, imo

 

[grimreper912003 5,000+ posts]

More port if you can, imo

what should I aim for?

 

[Rashaddd 5,000+ posts]

what should I aim for?

I'd go with closer to 4.5 cubes with 100 sq in of port or 80-90, whatever works best in your space

i'm sure the box you posted would do well too though so its up to you

 

[mrogowski 5,000+ posts]

That's a pretty good size actually. You can increase it to 4.5" but you will end up losing a fair bit of box volume.

 

[Rashaddd 5,000+ posts]

how much power btw?

 

[grimreper912003 5,000+ posts]

I'd go with closer to 4.5 cubes with 100 sq in of port or 80-90, whatever works best in your space
i'm sure the box you posted would do well too though so its up to you

so go below Mach 5's recomended enclosure? and If I change my port to 5.5" wide I get a little over 101sq in. Should I still tune to 30hz?

 

[grimreper912003 5,000+ posts]

how much power btw?

about 800w - 1000w RMS on one.

 

[grimreper912003 5,000+ posts]

That's a pretty good size actually. You can increase it to 4.5" but you will end up losing a fair bit of box volume.

I can change the port. Im willing to work with the depth and get the volume needed.

 

[grimreper912003 5,000+ posts]

any others??