Hey all!! So i am going to start building a box in the next week or so and have come up with an idea that i plan on going with, just a little curious as to how some of the board members feel about my design. Its going into a 1990 Chevy Caprice. Its pretty simple .. (4) 12" Kicker CVX's in a ported enclosure .. here's my design (pic below). Now I was planning on having the box set up as so -- the 4 12's on the top, and the port firing against the rear of the trunk. The Vent is 6" high, 14" Wide, and 20" Long and i wanna tune it to 32hz. Suggestions/Improvements? I was also wondering if i will have any issues with port noise? ..

All responses are welcome and this is my first official box build just want to make it a good learning experience. Thanks again!!!

you want have any port or minimal port noise just round over you edges, and do 45s in the corners they help air flow through the vent but i have a question why not port it through the rear deck or back seat instead of porting it in the trunk, like subs up so your trunk will still be jumping, then port throught the rear deck now that would get off, so basically port up subs up, just a suggestion if you wanted more cabin gain

How do yall do those screen shots?

Anyways looks good. Like Crownvic02 said, i would try to do a blowthru, external port

Press the print screen button on yo keyboard and then go to paint and paste the picture and save it as a image.

ye i agree with you. that would be optimal -- but you know how the box chevy trunk look. with all those bumps and all that uneven space. i wanted to stay away from cutting so much. i don't mind doing a little glassing, but less cutting. plus i wanted to mount some speakers and tweets on the rear deck, its not a very big area as you know.


oh ye and for bracing i forgot to include i wanted to use a few pieces of 1x2 wood to brace the box. good or bad idea?

Sweet! Thanks

if ur not doing external porting then Id do subs and port back towards the liscense tag. That will take some pressure off that lightweight trunk lid. Word to the wise....just cause ur rattling like hell doent necessarilly mean ur shit is all out loud. U'll get more output subs and port back vs sub and port up or sub up port back. Plus it might give u a extra 1ft3 of internal space

nevermined. Just did the math on it Even if u did do port and subs back.....it would add a lil more volume but given the demensions u have in the photo. That wouldnt be a very efficient enclosure for 4-12s. Maybe 2-15s. Cause once I added in sub displacement, port and bracing ur down to around 7ft3. 3.5ft3 per sub would be ok for 15s. Cone area doesnt always mean more air. It does if its efficient. But ur basically cramming 12s into a tiny box. My box for just my 2-12s is almost as big as the one in ur photo.

I'm going to go back to the drawing board. I may have to stick to doing 2 15s. Giving those 15" L7s 3.5ft3 should be a lot more efficient as you said. I am just limiting myself greatly because i dont want to glass the bottom of the trunk to have a flat surface to work with,maybe ill do that during the winter months and change my set up next summer. I have been thinking about external porting lately too. can you anyone give me some more insight into this??

thanks!!!

http://www.kingofthestreetgarage.com/forum...showtopic=74106

so i went back to tha drawing board and made sum adjustments to tha box. i shaved tha box down a little, after building a box out of cardboard i noticed some issues soo -- HxWxD now is 16x53x22 compared to tha 17x55x22. i previously based my calculations on giving each sub 2.0ft3 but i now adjusted it to 1.75ft3 still ported and have come up with a box with a final internal volume of 7.124 this value includes all bracing and all sub displacments. any suggestions?? i really want to go ported. and styll want to tune this box to 32hz so im going to have to play with that as well. any thoughts/insights??? thanks!!!!!!

your design is done, just FYI

you have a pm

I think i want a box chevy,

Can you send me that same pm for the 4 12's ported throught the rear deck? What's the dimensions of that box?

Very nice, 4th order FTW

Nice

I need a design when I choose my subs. Nice.

that will be $15 if you want this design (since its already made)

its $20 for a new design.

respects to caps .. appreciate tha knowledge given.

juss an update .. so caps came up wit a reel good design for me -- 4th order bandpass box (and i tryed building it for ma 1st build) and reel talk, it is kinda complicated for a beginner i must say. so i went with my original design ..

Day 1:













So i got a lot of shit done today. My plans for tomorrow and for the weekend are to get sum resin and a little fiberglass to mold the corners. Resin all the corners and make 45s all around the box and to add sum bracing throughout the whole box. Ive also been thinking about removing the back seat completely and re-enforcing it and making sum sort of blow thru set up with the amps showing or something.


** after all bracing and sub displacements and everything i have a lil over 8 cubes. so giving 4 12" cvx subs 2.0 cubes each OR giving 2 15" L7s 4 cubes each (max vented calls for 6.0) ... ma amp would run tha 15s more efficiently too, 1200 a piece to (2) 15s as opposed to giving 600 a piece to the (4) 12s (but the 30" of cone area opposed to the 48") got me thinking too much now.

** i was just reading through a thread from lass yr, made me think a lil !!!!!

so which ones are u doing 4-12s or 2 15s

thats not how u measure cone area but even though u would have more cone area with the 12s it doesnt always mean it will be louder or move more air. Dude out in Arizona had 4-10s in a 6th order bandpass with a single 3000D. He just got another design and switched to a 4th order bandpass and 1 Soundstream XXX15. The new design is more efficient, waaaay louder and moves more air. Shit split the vinyl on his armrest on the passenger side door the first day without any tuning. The 10s had more than double the cone area but that 1-15 gave better results. I say go with the 15s. If u already building the box for 12s then shoot. (havent read anything but ur last post)

what kinda table saw u got? I saw a Delta in Lowes the otherday for bout $600 I liked. My uncle came and snatched my shit last yr. It was his anyway but da nigga aint have da leave me hang'n like dat. I need a nice sized one on rollers.

tip: When ur doing the 45s. Make sure u use a few 2 or 3" wide strips of glass mat. U can either get regular mat and trim it to the width u need or they got some u can get called "tape" its just already cut to a certain width. Then pour ur resin. If u just use resin without mat then u stand a pretty good chance of it cracking later down the road. Mix enough resin and hardner to soak the mat. Then for a second coat mix a nice size chunk of short strand fiberglass bondo in with more resin/hardner and a few tabs of bondo hardner. Dont use too much bondo hardner as it will tend to heat up on ya.......literally. I had it happen a few weeks ago I was working on my homeboy's kick panels. Just a tab or 2 will do. Dat shit will dry much harder with the bondo mixed in with the resin.

oo. naw thas not a table saw in those pics -- i used that to wedge tha corners for ma port. but im using a rigid table saw. and i have separate rollers for them, comes in handy ..

i get what your saying, abt measuring cone area. i mean it isn't too late to switch to 2 15s i mean i have enough volume to give each 15 like 4 cubes (would it be enough).. tha box was deigned for 4 12s, but i could play with the calculations a little and switch to 2 15s. id probably just have to play wit the port size a lil to tun it to 32-33hz.

I knew that....read the tip I edited earlier

yaa i just saw that. i was going to do that resin in tha 45s like you mentioned. and ya i was warned about the heat with the resin, being my first time i dunt reely wanna get burned loool (literally) . so i will try wat you said with the sheets. thanks for that tip !!!!!

fuck it.......use what ya got. If u dont like it.....sell and rebuild

1 strip trimmed to 2" wide in each corner should do it. That should be enough to help make the resin soak. And yea....that shit will get hot as hell. Just rehular resin and hardner wont heat up. The more hardner u wuse the quicker it will rock up. But when I was mixing the bondo in with it. I wasnt paying attention and put too much bondo hardner in and all of a sudden dat shit got so hot I could even put my hands on it. Luckly it was hard enough for me to peel it off before it really set in and burned a hole through the 2 days worth of work I had already done, lol.

ohh okay ... well i meen nowthat i know how to mess with it, probably gunna do it tmmrw. appreciate tha knowledge tho!!!

Continue.

huh, actually I was mistaken. Its a rear loading horn.

Either way that is a BADASS sub.

Yea it is. Very efficient too. he bought it from Pete. Pete had 2 of em and 2 Colossus doing 150+ on music. Hit mid 50s fart'n

why dont you just get a real super pro bass box they hit way louder then any box you could make

1. no their not
2. your an idiot

In a SUV right? I remember seeing someone had 2 in a wall right behind their head and the seats where moving back and forth when the woofers cones moving in and out.



Get Out.



3. Ignorant Noob
4. Insult With A Prefab Box

yea......same sub. I think he still has the other one

what you talkin about i never heard what a real custom made box sound like but i can tell you this that ive had flea market boxes a real mtx box and a super pro bass box and when i put 2 12" jackhammers in every box they was way louder in the super pro bass box i had my trunk hoppin bumper bouncin sides and back window about to break

Someone do the honors for me.

fo real though he can go to a local audio shop and get a pro bass box for like 4 12s or 2 15s for like 200 or 300 and your trunk will womp but good luck with the build though


tip: there are fakes but the real one has walls built inside of it like a spider web and then makes it comes out of a port hole

seriously get the hell out of the audio section, all your doing is wasting our time

f u

aye brah. yu need ta move yurself from this thread wit that bullshit -- fa reel!!!