New box design for dual Q18

[spl_explorer 0]

So I have 2 designs to choose from. Both designs have a total of 11 cubes and tuned @ 31Hz.

This design fires into the side of my Xploder back by the hatch...

Subs up, port up...

What you guys think?

EDIT: Big thanks to AMATT85 over @ SMD!

I will be running the Qs off a MTX 92001

Edited December 13, 2007 by spl explorer

[j_black10 0]

I like design #2, it's like mine!!! I went from subs up, port back to this design and it was a world of difference. It's noticeably louder!! Mine is made out of 1" birch and its 13.15 cu\ft tuned to 28hz. I have the same SUV execpt mine is a 98 model. The side measurements are 21.75 H x 42 W x 31.5 D. I don't know if you saw my build on SMD but here it is!

http://www.*****.com/board/ind...showtopic=10163

[spl_explorer 0]

Yeah I remember that build. So subs up, port up hit harder? I thought anything but port up would hit harder! I have the same measurements as you. My box is around 13 cubes too, but after all the displacements its around 10 cubes.

[spl_explorer 0]

You said on your build log "Oh yeah! I think it's going to sound better and louder than my old enclosure. My port was to close to the back wall in my old box, giving a puffing noise when I would really pump it cause there wasn't enough space for the air pressure to release smoothly".

How far was ur port from the back wall? Have you ever metered your system? If not, what do you think ur around?

[NDMstang65 403]

2nd one should work fine.

Thanks!

[j_black10 0]

Yeap, it hits harder! I know people say sub up, port back is louder in SUVs, but in my expo sport it's sub up, port up. Since the box takes up the whole rear area, the bass has no where else to go but to the front! LOL! Also if you noticed I built 2 boxes. The first on was tuned to 33hz. It got loud but the quality wasn't as good as it is at 28hz. Qs like low tuning!!

[spl_explorer 0]

I would love to have the box redesigned for maybe 29-30Hz but I don

[j_black10 0]

You said on your build log "Oh yeah! I think it's going to sound better and louder than my old enclosure. My port was to close to the back wall in my old box, giving a puffing noise when I would really pump it cause there wasn't enough space for the air pressure to release smoothly".

How far was ur port from the back wall? Have you ever metered your system? If not, what do you think ur around?

It was 4" from the back wall. The port was 6.5 W x 19 L x 19 D and wasn't round off either (Forgot to before I put the box together)! This was the sub up, port back box. I had it metered with that box and hit a 147 on music. It was my first time doing it and I didn't know what I was doing, could have played a better song, tuning was off, etc. I think I could pull off a 150+ easily now. I got one thing working against me, FLEXING!!! Losing alot of pressure because my roof and side windows flex to much.

That one Q of yours pumps bro!! I know your going to be really pleased with 2!!!

Edited December 13, 2007 by J_Black10

[galacticmonkey 0]

If its a 4 door, do subs up, port back.

If its a 2 door, do subs up, port up.

[Lord Baccus 1]

i drive a 2000 Explorer Limited

i was doing 152.3db with the subs up port fireing backwards /

flipped the boxx up so the subs faced forward ports up did a 154.6db

all i changed was the position of the boxx

Edited December 13, 2007 by Lord Baccus

[spl_explorer 0]

You said on your build log "Oh yeah! I think it's going to sound better and louder than my old enclosure. My port was to close to the back wall in my old box, giving a puffing noise when I would really pump it cause there wasn't enough space for the air pressure to release smoothly".

How far was ur port from the back wall? Have you ever metered your system? If not, what do you think ur around?

It was 4" from the back wall. The port was 6.5 W x 19 L x 19 D and wasn't round off either (Forgot to before I put the box together)! This was the sub up, port back box. I had it metered with that box and hit a 147 on music. It was my first time doing it and I didn't know what I was doing, could have played a better song, tuning was off, etc. I think I could pull off a 150+ easily now. I got one thing working against me, FLEXING!!! Losing alot of pressure because my roof and side windows flex to much.

That one Q of yours pumps bro!! I know your going to be really pleased with 2!!!

Yeah I know 2 will slam 4 sure! I

[spl_explorer 0]

If its a 4 door, do subs up, port back.

If its a 2 door, do subs up, port up.

My X is a 4 door. I don

[amatt85 0]

I would love to have the box redesigned for maybe 29-30Hz but I don

Edited December 13, 2007 by amatt85

[spl_explorer 0]

I would love to have the box redesigned for maybe 29-30Hz but I don

[spl_explorer 0]

Hey J Black. What size did you cut the top piece so ur subs have the inset look?

[j_black10 0]

Hey J Black. What size did you cut the top piece so ur subs have the inset look?

My top is two 3/4" pieces. The top piece is 42" W x 29.5" L and the holes are 18 3/4". The other piece is 40" W x 22" L , subs are mounted to it. I glued and stapled those two pieces together.

Edited December 14, 2007 by J_Black10