In need of some MAJOR help! Please

[ferguson621]

Ok so I came up with a box for my three meso 18's that should be here tomorrow. Hopefully. It's oddly shaped. I'll upload a picture for a visual. But it's 55 wide on the top, and where it gets smaller is 41 wide. the top part is 10 inches tall, the bottom is 16 inches tall and the depth is 22 inches. I was going to do all three across the top but I miscalculated and I'm off by 1 1/2 inches in width. So now i'm going to do two facing up and one facing the hatch. I don't want to wall it off because I still want a little tiny bit of trunk space and It's fairly annoying having zero trunk space. Cause I carry a toolbag and my electrical bag also at all times incase I break down anywhere I've always got everything I need to get back on the road. I like to come prepared....anyways. I'm needing help trying to figure out the dimensions for the port. Oh and I would like it tuned to 34hz. A removable port would be even better so I can tune higher if I want. 33hz/38hz if that's possible. Thank you

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[Papermaker85 5,000+ posts]

Tell me the internal airspace ill plot it..im to lazy to do tge math.. lol

 

[ferguson621]

lol....well If I did everything right it's supposed to be 15 cu ft

 

[Papermaker85 5,000+ posts]

You going to put the port on the top? Its for 3 15s?

 

[Boomin_tahoe 5,000+ posts]

Lots of pallets.

You didn't factor in the port/build into it?

 

[ChaseinBass]

I am not a box designer or anything but that seems small for three 18s mine is 61w x 21d x 27 h and its just enough for two 18s comes to 16.45 cf before displacements -port and subs and any bracing. I think I ended up around 14 cubes and my subs need between 6- 8 cf each so i ended up right in the middle.

 

[ChaseinBass]

I come up with 12.18 before displacements ? I could be wrong ?

 

[Boomin_tahoe 5,000+ posts]

Ya your right chasinbass....seems small for 3 18's.

Gotta love it when people start building 1st then asking questions in the middle of box building lol

 

[Papermaker85 5,000+ posts]

With 15 cubes net thats small for 2 18s. Your looking at around 12 after displacments. Rethink the setup you wont regret it..

 

[ChaseinBass]

Ya your right chasinbass....seems small for 3 18's.
Gotta love it when people start building 1st then asking questions in the middle of box building lol

Thats too small for two 18s I dont know much about it but CSCSTang does lol he fixed me up with a design. I built it and he made my octo ports too.

 

[Boomin_tahoe 5,000+ posts]

Destroy it.

Back to the drawing board.

Time to call in reinforcement. @CSCStang help this fellow out!!

 

[ChaseinBass]

Ya your right chasinbass....seems small for 3 18's.
Gotta love it when people start building 1st then asking questions in the middle of box building lol

Plus If you put one in the front where would you put the port ? Specs on your subs call for 5 cf each so you need to shoot for around 18 cf and after port and sub displacements you will be around 15cf. I bet that going to be loud with 3 18s ! totally worth redoing man !

 

[Boomin_tahoe 5,000+ posts]

I'm guessing he was gonna add it on lol

 

[ferguson621]

well I was trying to do three 18's....my calculations were off....at first I was thinking I could do all three across the top, but didn't realize that the subs are 18.5 for the outer diameter. I factored in 16.5 like a dumb ***....which is the cut out diameter....I was just really excited and rushed everything thing and ended up ******* up. I was trying to squeeze 15-18 cubes without doing a wall. But It seems like that's the only way to go now. The hatch area of my car is absolutely stupid as far as the design of the interior. I'll show you my mock up that I did before I started building the box so everyone can see what I'm talking about. And yeah the meso's call for 5 cubes each. Does cscstang charge very much for a design? I know he know's his **** lol just wasn't sure if he was expensive or not. But thank you for all your input so far. I greatly appreciate the input and help

 

[Jeffdachef 5,000+ posts]

good thing that came out of this is that you are doing a wall now.