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View Full Version : New daily box for some Boston G5's



kushy_dreams
04-24-2012, 06:46 PM
I'm starting to build the new box for my G5s. It will be for a daily driver, but it will see competition time too. I got the design from a shop close to my parents house, the guy who did the design says he holds the record in meca street 5 at 160.9 and there is a special piece inside that should help with the airflow but its a secret. Here's my old box:

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874003_medium.jpg

I have no clue how to use sketchup or any sort of cad program, so I do all my designing by hand. This is what the box will look like lol:

http://img232.imageshack.us/img232/4923/20120423203434.jpg

4cu/ft tuned around 31.5hz, with a 6inch pvc port that will be removeable and I will have 2 other port tunes to swap in as well.


Here is the wood laid out so far

http://img542.imageshack.us/img542/190/20120423191206.jpg


Also this is my first build involving 45 pieces in the corners, wow they are a pita to cut, but not as hard as I thought.


An interesting note- according to winisd, my old box had a vent mach of .05 with 2 4inch ports (3.9@33hz) and the new box has a vent mach of .10 (4@31.5hz), the 6inch port even has slightly more surface area, whats up with that?

cyn
04-24-2012, 08:30 PM
anytime I hear secret piece and the words helps, i'm like okay so extra money for nothing special I see

kushy_dreams
04-24-2012, 09:22 PM
No $ involved. The design isnt official and is just something scribbled down on a piece of paper. I picked his brain about spl for over an hour one day and I think he was getting sick of me so he sent me off with a box design and was like "just shut up and go make this" lol. There was a guy at a comp in the fall that had some special piece in his box too and wouldnt let me inspect it or try and peer in the port. He said I had to buy the box for $100 if I wanted to find out- I think I know what he did now. It's really simple and I'm surprised none of the box designers on here utilize it.

cyn
04-24-2012, 09:24 PM
lol... reminds me of when they first started doing Snail Shell boxes was so **** secretive about it and crap

kushy_dreams
04-30-2012, 01:20 AM
I made a stand to meter at the headrest, it will be making a trip to my "high tech spray booth" this week. By high tech I mean my screened in patio and rattle cans. :laugh:

http://img256.imageshack.us/img256/4646/20120429192953.jpg



I'll be working on the box more in between finals as well, so more updates are on the way.

kushy_dreams
05-11-2012, 04:51 PM
Well finals and graduation are over and I got my building room back after a near week long party clean up from the grad party. Beginning to make some progress. The goal is to have the box done by next weekend to make it to one of the local (2 1/2hr drive) MECA shows. I'm about to order some edead to help the trunk out a little bit.

Got this done last night

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874064_large.jpg


I'm about to put the bottom on and glue in the 45s and cut the holes for the port mounting lips.

09civic
05-11-2012, 04:56 PM
Moar.

kushy_dreams
05-11-2012, 07:26 PM
Just put the bottom on and some of the dowels


http://carphotos.cardomain.com/ride_images/3/109/1749/25270874065_large.jpg


http://carphotos.cardomain.com/ride_images/3/109/1749/25270874066_large.jpg

itsblown
05-11-2012, 07:33 PM
I sat looking at the box for a solid 5 minutes trying to figure out what that extra piece might be still have no clue. I might make it out to that meca event. Also how easy is it to swap ports out and back in?

kushy_dreams
05-11-2012, 07:43 PM
Lol no one will ever guess it, its so simple. I just hope I did it right because I was just given a picture and no real dimensions other than exterior dimensions. I can't wait to see how it works.

Swapping ports is plug and play with 4 wing nuts.

itsblown
05-14-2012, 08:17 AM
Ohh I see and I feel like this extra piece is some kind of a cruve sending air towards the port

jirehn
05-14-2012, 08:35 AM
What is this box dude?This is cool.

Joseph7195
05-14-2012, 09:15 AM
I didn't realize you had a build log going on!! Consider me tuned in for sure!! I have always wanted to do an enclosure with a replaceable tuning port. Subscribed!!

kushy_dreams
05-14-2012, 01:09 PM
I'm not gonna lie, the removeable port idea was stolen from a box build DonH did for disturbed471985 for 3 skar 10s, only it won't have a wooden piece on the inside to act as a flare. I tried to find the build log thread to link to pictures, but I couldn't find it and I searched back to august of 2011 and I know I saw it after that, I just don't remember when.


edit: found it: http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/533865-box-build-disturbed-donh.html

disturbed471985
05-15-2012, 03:40 AM
I'm not gonna lie, the removeable port idea was stolen from a box build DonH did for disturbed471985 for 3 skar 10s, only it won't have a wooden piece on the inside to act as a flare. I tried to find the build log thread to link to pictures, but I couldn't find it and I searched back to august of 2011 and I know I saw it after that, I just don't remember when.


edit: found it: http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/533865-box-build-disturbed-donh.html

Best box I have ever used to date... Don IMO is one of the top builders on this site. The real rare thing is he is not all about the money like all the other builders are on this site.

P.S why u stealing my box design????????:verymad: Just BSing go with it man looks clean and who does not like being able to change tuning in a matter of mins??? GL with build man.

Also, plz for godsakes DO NOT USE EDEAD!!!!!!!! I have 50sqft cover on just my doors and its the worst crap I have ever used. The backing is like plastic it does not stick for very long the ends will curl in a matter of months. Just garbage Fattmat even being a lower quality product was actually a vastly better product... Run my friend RUN

kushy_dreams
05-15-2012, 11:42 AM
The edead is to cover holes on the cheap, not really for actual deadening, lol the discussion came up in another thread too.

kushy_dreams
05-15-2012, 11:46 AM
45s have been glued in:

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874067_large.jpg


This might be the last shot of the inside you guys will get to see :up2somet:

double 07
05-15-2012, 12:28 PM
Just put the V shaped board in the back of the box right behind the port already so people can stop wondering....lol.....dont know if i guessed it or not!!!!

kushy_dreams
05-15-2012, 12:33 PM
:sneaky:

double 07
05-15-2012, 02:47 PM
The 3 pencil lines in the center on the backwall of the box kinda gave it away!!!!!! dang the secret is out.........lol

kushy_dreams
05-15-2012, 03:02 PM
The 3 pencil lines in the center on the backwall of the box kinda gave it away!!!!!! dang the secret is out.........lol

Aw crap you busted me haha.

So how much do you know about the V's behind the port?

I totally guessed on the gap and made it 4 1/4inches from the end of the port to the point of the V and I'm using 6inch pvc. I figured it would be ok to sort of choke off the opening. The design I was given called for 2 4in aeros mounted over/under like a double barrel shotgun.

The higher tuned ports will have allow more clearance between the port opening and V as obviously they will be shorter.

double 07
05-15-2012, 03:11 PM
Seen it done before.....never really used it.....curious though on how it would do to build a small pyramid behind the port instead of a v.........be some compound cuts but i bet it would be cooler than the other side of the pillow.......that way it could direct air from all directions toward the port......mmmm.......i just wonder..build it then round the edges

kushy_dreams
05-15-2012, 06:58 PM
Seen it done before.....never really used it.....curious though on how it would do to build a small pyramid behind the port instead of a v.........be some compound cuts but i bet it would be cooler than the other side of the pillow.......that way it could direct air from all directions toward the port......mmmm.......i just wonder..build it then round the edges

So you're saying mount a small pyramid on the back wall, so it would point toward the port? Interesting, never thought of that one.

I have thought of trying to put grooves into a round port, to give it a rifle effect.

kushy_dreams
05-16-2012, 11:56 AM
more progress

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874068_large.jpg


I figured I'll show pics of the inside as my way of giving back for all the knowledge I have gained while being a member on here

kushy_dreams
05-16-2012, 07:07 PM
Well you guys will be happy to know that I cancelled my order for the edead because its on backorder.

The ****** part is my trunk won't be airtight for the show on sunday, so I might not go.

I'm really pissed because I wasn't sent an email or called or given any kind of notice, I found out when I logged in to check the status of my order.

kushy_dreams
05-18-2012, 01:41 AM
test fitting the final pieces....so close to getting to hear it!!

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874069_large.jpg

itsblown
05-18-2012, 07:32 AM
test fitting the final pieces....so close to getting to hear it!!

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874069_large.jpg
Looks like ****. Lol just kidding Hope that the "secret" piece makes a difference.

double 07
05-18-2012, 07:38 AM
Looks good!!!!!!

kushy_dreams
05-18-2012, 11:37 PM
Looks like ****. Lol just kidding Hope that the "secret" piece makes a difference.

It better work lol, I'm gonna be really pissed if this doesnt get louder than my old box after all the time I have put into this thing.


Looks good!!!!!!

Thanks!

kushy_dreams
05-19-2012, 04:14 PM
Finally got it all buttoned up and ready to go:

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874070_large.jpg

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874071_large.jpg


For those that have never seen a G5, this is what they look like:

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874072_large.jpg


I have never seen a 12 this beefy with such a lightweight moving mass, 148.5g, but the sub as a whole weighs in around 30-35lbs.

They are supposed to be designed for sq, but they have no problem getting loud too.

link to literature about its features and construction: http://www.bostonacoustics.com/PDFs/newproduct/G5_lit.pdf

kushy_dreams
05-20-2012, 09:11 PM
Well I had to work till 5am last night so I didn't feel like driving 2 1/2hrs on a couple hours of sleep to meca so I slept in.

I did some metering with my spl lab

at the headrest 140.8 @49hz
sealed on the dash 142.4 @50-51hz

Box is 4 cu/ft tuned to 31.75hz

The car seems to have 2 peaks, ~37hz and ~50hz, the higher one yields a slightly higher score


http://carphotos.cardomain.com/ride_images/3/109/1749/25270874073_large.jpg

fwiw the electrical system is 100% stock and the car has maybe 10sq/ft of deadening between all 4 doors, some may chastise for this but I don't plan on having the car much longer so I don't really see any further upgrades.

I'll take some vids tomorrow

kushy_dreams
05-21-2012, 04:27 PM
vid of 142.57 @49hz sealed on the dash: boston acoustics g5 12s sealed on dash spl score - YouTube (http://www.youtube.com/watch?v=tlM6a9vWIiI)

vid of 141.23 @44hz at the headrest: boston acoustics g5 12s meca headrest spl score - YouTube (http://www.youtube.com/watch?v=HxFVLei8dqQ)

Its not getting as low as I was hoping with the low tune, so I think in the next few days I will throw together some more port tunes and see if I can bump the scores up.

kushy_dreams
06-07-2012, 02:25 PM
I made another video, I slowed down white girl to 26hz and 43hz. Not too bad for some 6yr old sq subs if you ask me. The trunk flexes so much more in person, I'm going to sit on the lid and play around with the meter and see what happens.



http://www.youtube.com/watch?v=qPCYqu5vqEk&feature=youtu.be

BrownVanMan
06-07-2012, 02:38 PM
so have your tried different ports yet? thats a pretty **** impressive score

kushy_dreams
06-07-2012, 04:01 PM
I havent really had time to do another port plus a new roommate moved in so I lost my workspace. I might throw something together soon so I can maximize my score for meca at the end of the month.

itsblown
06-07-2012, 04:21 PM
**** thats flexing like crazy. You might see me at meca, might... im getting 2 sa-12s in on my 1500 gotta play around with the fusing to get me into a class I wont be absolutely destroyed in.

kushy_dreams
06-07-2012, 04:48 PM
There are no places in toledo that sell 30a fuses, so if you are trying to get into as1 or s1 you will have to buy them online if you want to use them. No one has broke a 140 in as1 in oh this year, closest is a 38.6. I have a solid 40 closer to a 41 on music, it will prob get higher when I make some higher tuned ports.

itsblown
06-07-2012, 05:20 PM
There are no places in toledo that sell 30a fuses, so if you are trying to get into as1 or s1 you will have to buy them online if you want to use them. No one has broke a 140 in as1 in oh this year, closest is a 38.6. I have a solid 40 closer to a 41 on music, it will prob get higher when I make some higher tuned ports.
hmm going to have to do some testing with how long they will last before popping. Is there a difference between mini anl and anl when it comes to how long they will last before blowing

kushy_dreams
06-07-2012, 07:33 PM
i have never really messed with anl's because they are hard to find in sizes under 100a. i just use agu's.

itsblown
06-11-2012, 03:36 PM
i have never really messed with anl's because they are hard to find in sizes under 100a. i just use agu's. I see I just bought a knu konceptz mini anl fuse holder ughh still thinking over the sub choice though lol.

kushy_dreams
06-12-2012, 10:19 AM
I see I just bought a knu konceptz mini anl fuse holder ughh still thinking over the sub choice though lol.

To me it seemed that mini anl's are kinda pricey in the long run, they are about $1 each, I found agu's for .50ea. I just got a cheap AP fuse holder from the Andersons for like $5

kushy_dreams
06-13-2012, 08:28 PM
I got some more time to play around with the meter. I did 141.18db in the video. I found if I que the song to the 43hz bass line and don't play from the beginning, I was getting 141.4-141.5. Its the same song from the vid above, White Girl remix slowed to 26/43hz.


http://www.youtube.com/watch?v=YsNpIfDxHsQ