please help! i need a box design for mj 18's

[6pucker 0]

well, i really really want two mj 18's in my trunk but the current box didnt fit! please help me out with a box design. the current dimensions for the box are 38 1/2 inch's wide, 24 3/4 deep, 24 1/4 tall. i just measured again and this is what i came up with...42 inch's wide max, 22 inch's tall max, and 21 inch's deep. please can anyone help me out. this is for my birthday presents which im going to be getting in two weeks. ssa i will be contacting you for two mj 18's really soon!

btw i want the box to be ported...i dont care if its slot or aero. leaning more towards an spl box.

thanks in advance

[Acidburn 10]

I really don't think you have enough room to give 2 18's the proper space.

[JEREMIAH 0]

cant do it

[Mike P. 0]

cant do it

Why not?

[6pucker 0]

but i really really want them! what about the maw 15's? i guess ill go with the 15's if i have to. any other suggestions about the mjs. please please i really really want them!

[johnecon2001 82]

You could do 2-15's ported to 32hz and be fine with the space you have. 2 18's... you'd have to go sealed.

[Aaron Clinton 2,372]

If you are dead set on porting, it would be wise to go with the 15's I think. But I have an MJ18 sealed and it does very well.

[Mike P. 0]

The recommended size for the MJ18 ported is 128 litres (4.5 cu. ft.) 30Hz tune. His box internal size is 9.3 cubic feet. Why is everyone saying he can't do a dual ported? What am I missing here?

Edited January 21, 2008 by Mike P.

[johnecon2001 82]

The recommended size for the MJ18 ported is 128 litres (4.5 cu. ft.) 30Hz tune. His box internal size is 9.3 cubic feet. Why is everyone saying he can't do a dual ported? What am I missing here?

Because that 9.3^3ft is before the port and woofers. Internal volume will go down considerably after he adds those two things.

[mrogowski 6]

Yup, and even to cut back an inch or two to make sure your box will fit, you will end up with ~8.8 cubes - should be enough. If you're after more SPL tune the box to 35Hz. Internal dimensions should be 40" x 20" x 19". Make your port 5.5" x 99sq inches and 17" long. It obviously won't fit in the front, but I'm sure you can work the dimensions around so you can fit the port in.

[Mike P. 0]

Considerably? Allowing 1.3 cubic feet for subs and porting still gives him a 8 cubic foot box. Close enough.

[mrogowski 6]

The recommended size for the MJ18 ported is 128 litres (4.5 cu. ft.) 30Hz tune. His box internal size is 9.3 cubic feet. Why is everyone saying he can't do a dual ported? What am I missing here?

Because that 9.3^3ft is before the port and woofers. Internal volume will go down considerably after he adds those two things.

Use WinISD to configure your boxes. It takes port area into consideration. That leaves the drivers, which is minimal to non-existent.

Best,

Mark

[smokinkane 0]

Just go sealed, my brother has one mj sealed in 3.5cubes and it is loud as hell.

[6pucker 0]

ill paypal someone $20 bucks for the two mjs. i know it isnt much but im broke!

[ANeonRider 3]

huh?

[mrogowski 6]

ill paypal someone $20 bucks for the two mjs. i know it isnt much but im broke!

Hmmm...

Would you like mustard with that?

[6pucker 0]

ill paypal someone $20 bucks for the two mjs. i know it isnt much but im broke!

Hmmm...

Would you like mustard with that?

for the box design

[mrogowski 6]

Ah, Ok, that makes more sense.

[Puggsley456 0]

Just pissin in the wind here but......

If you want a 18 so bad why not go with the IXL 18 and port it?

[big420atx 0]

Just pissin in the wind here but......

If you want a 18 so bad why not go with the IXL 18 and port it?

i think you got the wrong thread man...

[Puggsley456 0]

Just pissin in the wind here but......

If you want a 18 so bad why not go with the IXL 18 and port it?

i think you got the wrong thread man...

No I dont.

He wants 2 MJ18's but the box doesn't fit, therefore I purposed the option of a single IXL 18 with the same power.

[JEREMIAH 0]

hm good thing an amp can do the same power at 4ohms that it can do at 2ohms.......

[ANeonRider 3]

hm good thing an amp can do the same power at 4ohms that it can do at 2ohms.......

Lots do

I have 2 in my car right now

[JEREMIAH 0]

o..I for got about a/b amps................

[ANeonRider 3]

I have Class D amps