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View Full Version : 2 18" DC LVL 5's in GMC JIMMY box design HELP!!!



jdubbau
07-28-2009, 10:41 AM
I need a box design put together as I have been waiting over 1 month for PWK or Pete Kulwiki to send back an email reply on the mistake that was made on my last design I waited another month for.

So here is what I am looking for design with cutsheet, Not just a quick thrown together design as I want to maximize this enclosure the best way I can. I have even thought about doing an interchangable port as it would be nice to be able to tune low for daily and exhcange the port for comps??

Some one out there up to this? I know there is a few of you out there that do designs but and I am able to pay $20 for the design but need it like yesterday.

2000 GMC Jimmy (my vehicle)
Max Dimensions 39"Wide, 17.0" Tall, 32" Deep with port firing back can be 36" if port fires diffrently.

Special instructions 18" tall is my max TALL dimensions which would included the subs if monthed on the top so if recessed or antother mouting locatikon is found please let me know.


Please let me know guys and gals,
[email protected]

amartin_72
07-28-2009, 10:52 AM
I wouldnt go less than double layer all the way around

amartin_72
07-28-2009, 10:56 AM
I dont think you have the room unless you go to 36 deep.


39"Wide, 17.0" Tall, 32" Deep

Internal 36w x 14tall x 29 deep = 8.45 before port/sub displacement - about 3.5 cubes each

Single layer with bracing 36 deep would only bring 11ft before port and sub displacement so 5 ft per sub, but that would be one flimsy box.

amartin_72
07-28-2009, 11:01 AM
Do you have to keep it below the window line? another 3 inches tall would help a lot, you gain alot of cubic feet going up.

dappa5
07-28-2009, 11:18 AM
I dont think you have the room unless you go to 36 deep.


39"Wide, 17.0" Tall, 32" Deep

Internal 36w x 14tall x 29 deep = 8.45 before port/sub displacement - about 3.5 cubes each

Single layer with bracing 36 deep would only bring 11ft before port and sub displacement so 5 ft per sub, but that would be one flimsy box.


why all dbl walled ?? why not just dbl baffle and brace/resin the other walls??
will gain mucho air space
but do need to go su/pu and take all 36 in though

jdubbau
07-28-2009, 11:19 AM
I have to keep it under the back seat line other wise I will move up two classes in Meca competitions. I realize this is UNDER the recommended specs for DC LVL 5 18's but Rusty said he actually has build a box at 7 cubes for 2 and thought it would have really degraded the sound level and sound quality but SQ was still right on with a 16 cube box and .5db was lost on SPL. So I realize this is going to be tough.

HOWEVER I can get my hands on 1 inch MDF or 1 1/8 inch MDF to strengthen the walls, bracing, front baffle and all.

So let me know as it looks like you are asking all the questions I need answers to.

jdubbau
07-28-2009, 11:20 AM
Subs up port UP is fine if the sound quality is not going to suffer and sound like crap as well as my SPL too.

jdubbau
07-28-2009, 12:17 PM
HERE is a freebie dual 12 design guys that was made by PWK for my Ford Taurus about 2 years ago.

If someone can design what I am needing with close to this kind of info for me on dimensions and a little thought behind the design as far as it will will perform let me know.


if amart don't get it done right lmk
i'll fix you up


Something like this provided as blueprint or minimum to show the dimensions of the out and inside if possible so it will take some work.


Design from a CARAUDIO.com DOG
http://i364.photobucket.com/albums/oo81/jdubbau501/KerfportUPSUBSUP.jpg

http://i364.photobucket.com/albums/oo81/jdubbau501/NIGHTSHADE15S3-1.jpg


PWK DESIGN OLD 2 12's this design may be the way to go for 2 18's and I would bet PWK is going to send me a bigger design just like this for 2 18's as it seems as he uses the same variations on boxes just different dimensions as far as what I have ordered from him.

http://i364.photobucket.com/albums/oo81/jdubbau501/3dboxthewayitshouldlook.png

http://i364.photobucket.com/albums/oo81/jdubbau501/diagnalviewmoredimensions.png

http://i364.photobucket.com/albums/oo81/jdubbau501/topwithdimensionsPWKdesign.png

http://i364.photobucket.com/albums/oo81/jdubbau501/overalldimensionsoutside.png

I guess I just kind of gave up a PWK mean dual 12" design here but it should get the point across of what I am looking for as this particular box performened very well Audible sound wise but not so well on the TL.

jdubbau
07-28-2009, 12:18 PM
This should help alot of people out with dual 12 set ups so consider me a contributer now as I paid $50 for the design and $10 or so for the top one.

jdubbau
07-28-2009, 12:26 PM
Power ability I have? AB 700.1 American Bass 7k plus!

Want SQL with 153 Db ability if possible and sound good doing it. ( tough to do I know)


Trucks Resonant FREQ was 51hz last I checked
Yes it was 51hz the last TL run I had with 2 15 inch sundowns at 150.4 db with way less power though and box tuned to 40-42hz I beleive.

and tunung preference? slot/aero?


SLOT Tuned to around the 40Hz mark (removable port to do more of a audible loud and low for daily and a 153db comp thumper would be great BUT I KNOW THAT IS ASKING A WHOLE LOT!!) LOL:eek:

Annnarbor84
07-28-2009, 12:27 PM
Did you ever try calling Pete? His internet out there in Tombstone is garbage to say the least.....

iamamp3pimp
07-28-2009, 12:35 PM
im not promising numbers but you have an email.

and i ran an RE MT 18 in a 3.7 @ 36 HZ and it slammed all the way down into the low 30's......did a 146.5 @ 46 hz off 1500 watts......so we will see.

-Robin

iamamp3pimp
07-28-2009, 12:37 PM
if you can do one inch MDF ill add some bracing in there as well....

jdubbau
07-28-2009, 12:59 PM
Did you ever try calling Pete? His internet out there in Tombstone is garbage to say the least.....

You ever tried calling pete? All I get is a this number is disconnected or has been changed. So I guess I need his UPDATED phone number as I cannot ever get through. so if someone has it please let me know.

Mr. Slate
07-28-2009, 01:15 PM
Sub up port back works best in an SUV.

iamamp3pimp
07-28-2009, 01:18 PM
looks like i have got some work to do.

-Robin.

bumpin buick
07-28-2009, 01:24 PM
I have to keep it under the back seat line other wise I will move up two classes in Meca competitions. I realize this is UNDER the recommended specs for DC LVL 5 18's but Rusty said he actually has build a box at 7 cubes for 2 and thought it would have really degraded the sound level and sound quality but SQ was still right on with a 16 cube box and .5db was lost on SPL. So I realize this is going to be tough.

HOWEVER I can get my hands on 1 inch MDF or 1 1/8 inch MDF to strengthen the walls, bracing, front baffle and all.

So let me know as it looks like you are asking all the questions I need answers to.

Sorry but I think that is a big line of BS from Rusty if that is so. I refuse to believe that a 9 cube difference on two 18"s sounded just as good and only lost .5db. I would love to put money up on that, and have some lvl 5s of my own that I would guarantee will change drastically. I dont mean to sound like an *** but I guess I will just let you find out the hard way if you believe that is true, I only had 10 cubes to work with below my window line so that is why I got recones from Rusty to make them 15s so they could be sufficient in the space I have. If the recones ever get here I will do enclosure tests to see if going to nearly 1/3 the recommend enclosure will really only drop me .5db. Assuming same power and tuning, he must not have paid any attention to what he wrote.

iamamp3pimp
07-28-2009, 01:32 PM
there are more things that play into the number than enclosure size.


im not defending anyone though.....just stating a fact.

:)

bumpin buick
07-28-2009, 01:35 PM
there are more things that play into the number than enclosure size.


im not defending anyone though.....just stating a fact.

:)

No i totally agree. Im just stating that if he had identical tuning and power, I would like to argue that 7 cubes for a pair of lvl 18s will not be just .5 less. Unless he had a really big and ineffecient box for the first score, then made a nice strong one for the the 7 cubes.

JBloud47
07-28-2009, 01:35 PM
what kind of width would you have if you built over the wheel wells?

jdubbau
07-28-2009, 04:26 PM
what kind of width would you have if you built over the wheel wells?

I have thought about the same thing as if the box could be cut on top and bottom to be a little abnormal than usual instead of a rectangle or square I would have a ton more room!!!

If I had to guess and be conservitive with out measuring right this minute I would say I could make the enclosure 6"-8" wider on top over the fender wells and come all the way back with this space on the passenger side where my battery is now mounted for an additional box space. So if done correctly with a little more precise measurements provded by me I may be able to squeeze an extra 1.5-2 cubic feet out of it.

Iamapimp is doing my design so I will see if this is something he can throw in for me if I give him the correct measurements.

Thanks all and Bumpin you are more than likely right as I am sure he just wanted to sell me two of these monster 18's but if the first box was just built ok or thrown together it is really a high possibility Rusty's customer only lost .5db. Just throwing that out there as there are just to many variables but these things will need a lil room to breath but if done correctly which I think Iamapimp is on the right track it will do more than I want it to and if not I will just build another box or use just 1 18 for comps.

jdubbau
07-28-2009, 04:29 PM
iamapimp is doing build guys and gals so thanks for all of your input and help

OH check out my last 15" Alpha I have up for sale as it is BRAND NEW LOOKN when mounted and has a basket crack but performs perfect with out any type of fix for the crack or anything yet. Selling for what you normally pay for just a motor or close anyways. CHECK IT OUT!!

Also I will possibly have SOUNDSTREAM RUBICON 702 up for sale here soon so be on the lookout as my prices are always on point!!

iamamp3pimp
07-28-2009, 04:31 PM
it will help out for sure.

dappa5
07-28-2009, 07:19 PM
n/m

iamamp3pimp
07-28-2009, 07:24 PM
interesting....

dappa5
07-28-2009, 07:35 PM
n/m

iamamp3pimp
07-28-2009, 08:24 PM
do they count the surround in the height as well?

iamamp3pimp
07-28-2009, 08:25 PM
im not going to chance it for a quarter inch....

off to work i go.

the top baffles will be 3/4, the rest of it will be 1"

Mr. Slate
07-28-2009, 10:14 PM
do they count the surround in the height as well?

Yes.

iamamp3pimp
07-28-2009, 10:22 PM
how tall is it off the basket?.... will it be over 1" tall....im working on one usine double panel and 3/4 flush mount.....17.75H

jdubbau
07-29-2009, 11:25 AM
What ever route you think will work best.

bumpin buick
07-29-2009, 11:28 AM
Is this for a NW build? I am assuming that is what you are going for, my 2 lvl5s will be in a nw box by the end of this week. Best of luck on things.

iamamp3pimp
07-30-2009, 02:16 AM
so hmmm

something decent.

http://i35.photobucket.com/albums/d177/iamamp3pimp/Designs/jdubbau/xray2.jpg

http://i35.photobucket.com/albums/d177/iamamp3pimp/Designs/jdubbau/finished4.jpg

http://i35.photobucket.com/albums/d177/iamamp3pimp/Designs/jdubbau/xray2.jpg

:)

more to come actually...

dappa5
07-30-2009, 02:22 AM
**** it robin i was still trying to get a pattent on tha port design i'll have to find pics of a grnd cherokee i did almost the same lol
i took the port all the way to bottom of box but same concept

very nice job