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View Full Version : Fixed the image and need advise please!



Fuknmovin
03-20-2010, 11:49 PM
I am looking at downsizing and doing a sub forward/port forward box for behind the rear seat in my truck for a single 10" sub. This pic is minus the front baffle but you get the point. I need to know weather I figured the port length right and what the tuning will be the dimensions are all there but the box is 15" tall outside dim. with a port of 5.5X5" inside dim. Anybody want to figure it for me? I was shooting for about 38Hz how close did I get?

Thanks!

http://i116.photobucket.com/albums/o29/fuknmovin/Untitled.jpg

Fuknmovin
03-20-2010, 11:53 PM
Here is the finished product...

http://i116.photobucket.com/albums/o29/fuknmovin/FinalBehindseatbox.jpg

kmanian
03-20-2010, 11:57 PM
your wife looks like that auctioneer from Barrett Jackson.

Nice

kmanian
03-20-2010, 11:58 PM
And I will look into your measurements in a min.

Fuknmovin
03-21-2010, 12:07 AM
Thanks!

kmanian
03-21-2010, 12:18 AM
I get right at 41hz

kmanian
03-21-2010, 12:23 AM
with an Epic 10 you are going to have a f3 of about 34hz, not considering your cabin response

Just FYI,

Fuknmovin
03-21-2010, 02:02 AM
So you think its a good design for a crew cab?

CJL
03-21-2010, 02:12 AM
I wouldnt feel comfortable with that port design but,im no expert.

Fuknmovin
03-21-2010, 12:29 PM
I wouldnt feel comfortable with that port design but,im no expert.

Why do you say that? I have to turn it like that because I need the width to get the proper volume and if I don't turn it forwarde, it won't have enough breathing room, it will be blocked by the side of the truck....

kmanian
03-21-2010, 03:24 PM
The deisgn lends itself to be fairly ridgid, however I would add a brace between the front and back panels about halfway beweeen the port and the sub.

I personally would like to see the port a little shorter, but that would mean making the size of the port smaller or tuning slghtly higher if you don't want to change the volume of the box.

But that is a small issue, I think it will be fine

Fuknmovin
03-21-2010, 03:30 PM
Thanks! I just picked up the wood and am going to build it today!

kmanian
03-21-2010, 03:33 PM
progress pics please

Fuknmovin
03-21-2010, 03:59 PM
Will do!

RAM_Designs
03-21-2010, 04:31 PM
Yeah, you might get some of that "dead space" effect by having a long skinny section of the box that's supposed to count as box volume. Might lower the perceived volume and raise tuning.

RAM_Designs
03-21-2010, 04:44 PM
Here's what I got.

56x15x7

2.35ft^3
-.53ft^3 for port
-.12 for sub(just guessing, and for simplicity)
-------------------------
1.7ft^3 net.

1.7ft^3 with a 5.5"x5" port 29" long gives you roughly a 35hz tuning.

Fuknmovin
03-21-2010, 08:45 PM
COol either way Ill be happy..

Fuknmovin
03-22-2010, 01:42 AM
Here is the beginning, I got most of the work done but I realized my jigsaw was at work!!

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0321001203.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0321001524.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0321001524a.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0321001608a.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0321001608.jpg


This should be a fun box, I am liking the idea of not having 4400 watts, I am more interested in doing a lot with a little now, seems more of a challenge, I had 150db at the headrest with a 15 in a 6th order, now I would like to get 130 with a single 10, I would be happy with that! I need a better sub first though, my measly MA is gonna have a tough time, but I will make it take 500 all day! not the 300 its rated for, I DO have 5 other backups LOL!

Anybody want a HUGE amp? True 4000 watts, measured it myself!

Fuknmovin
03-22-2010, 02:07 AM
Anybody got any ideas for a good power handling sub to fit this box? I was looking at the FI SSD, it seems like it will fit and should take 1000rms all day right? I am sure the MA sub will not live too long, as I like to turn it up...Anybody want to trade MY MA 4400 watt amp for a nice 10 that will fit in here and a decent (like Hifonics grade) 1000 watt amp?

RAM_Designs
03-22-2010, 02:08 AM
I used to use those purple labeled screws but had too many instances where I'd strip through the MD because the windings wouldn't grip good enough...ever have that issue?

BumpinKota
03-22-2010, 02:30 AM
I would have maybe done sub forward port up. Nice box tho should sound good.

RAM_Designs
03-22-2010, 02:38 AM
Anybody got any ideas for a good power handling sub to fit this box? I was looking at the FI SSD, it seems like it will fit and should take 1000rms all day right? I am sure the MA sub will not live too long, as I like to turn it up...Anybody want to trade MY MA 4400 watt amp for a nice 10 that will fit in here and a decent (like Hifonics grade) 1000 watt amp?

What kind of budget are you working with?

Fuknmovin
03-22-2010, 02:39 AM
That would have been good but this truck hates port up for some reason, been there done that....

As for the screws, you just pre-drill them with a 1/8" bit and they work great!

Fuknmovin
03-22-2010, 02:40 AM
What kind of budget are you working with?

Less is better, but I want a decent one...

RAM_Designs
03-22-2010, 02:52 AM
As for the screws, you just pre-drill them with a 1/8" bit and they work great!
I predrilled too and they just didn't grab in some cases...couldn't figure it out. Only use coarse thread drywall screws now.


Less is better, but I want a decent one...
The SSD is probably a good choice. Maybe an IA Lethal Injection or a DD 2500.

Fuknmovin
03-22-2010, 10:25 AM
So, do you think, this brace here will stop it from not seeing the true volume of the box? I don't want to go through all this and have it **** a$$.

http://i116.photobucket.com/albums/o29/fuknmovin/Behindseatboxbrace.jpg

Fuknmovin
03-22-2010, 01:25 PM
Where did my helpers go? I just spotted the 1008b from DD does anybody know how these do? I can fit two in my box, they might sound killer I think!

RAM_Designs
03-22-2010, 02:23 PM
That box would be good for a pair of 8's like that. And I wouldn't go with that brace, do something that isn't intrusive and won't affect air flow...like a wooden dowel.

Fuknmovin
03-22-2010, 02:25 PM
OK I was trying to keep the dead space from doing something weird.. Do you know of any adhesive I could use for the front baffle that will still come off later so I can just make a new baffle when I get the 8's??

RAM_Designs
03-22-2010, 02:30 PM
OK I was trying to keep the dead space from doing something weird.. Do you know of any adhesive I could use for the front baffle that will still come off later so I can just make a new baffle when I get the 8's??

I've used silicon in a situation like that. Creates a good seal and you can use a knife to cut it loose once you get the new subs. Just be sure to use enough screws so that everything is tight since you don't have the strong adhesive properties with silicon.

Fuknmovin
03-22-2010, 03:05 PM
OK that's what I was thinking of trying. So it works good then. That is what I will do!

Fuknmovin
03-22-2010, 11:28 PM
OK no pics because I Have to finish routing the port opening and sand the whole thing down, but it is looking like it will sound good, there is a HUGE resonance if I blow into it with the compressor! Better than any of my previous boxes to be honest! It sounds nice and low... On the plus side, I sold my MA amp because it was just too much amp for what I am doing, not to mention is HUGE! Now I have to find the perfect sub for this box in the 150ish range. I am thinking the RE SE, the old style not the ***, I found some on Ebay for a good deal what do you think of those? I think I can even go 12" sub!

Fuknmovin
03-23-2010, 04:59 PM
I took a risk and ordered one of these in a 10" from a recommendation from a forum member on here, seems like a healthy sub, hope it works well! I also got a great deal on an Audiopipe 1500D for the sub, should do well and I got both shipped to my door for under $356.00! Economy buster system here I come! LOL!

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220568848863&ssPageName=STRK:MEWNX:IT

RAM_Designs
03-23-2010, 07:50 PM
There's a reason why their feedback is so low...

Fuknmovin
03-23-2010, 09:46 PM
He has 4000 plus sales and 94% score that's only a few bad deals and I looked them up, they were not sub related...It should be fine, I just hope it sounds good!

RAM_Designs
03-23-2010, 09:49 PM
He has 4000 plus sales and 94% score that's only a few bad deals and I looked them up, they were not sub related...It should be fine, I just hope it sounds good!

I've just heard very sketchy things about their recones and such. Like not using a coil that'd benefit from an XBL^2 motor, just throwing together random stuff. And 94% is pretty bad. Think about this, of the 4000 transactions they've had, there were 240 bad ones that were reported. You have a 1 in 16.6 chance that something will go wrong going by those stats.

Fuknmovin
03-23-2010, 09:52 PM
I guess, but I didn't have much choice, they can't be any worse then the Konaki crap that was a big hit here not too long ago!

RAM_Designs
03-23-2010, 09:54 PM
I guess, but I didn't have much choice, they can't be any worse then the Konaki crap that was a big hit here not too long ago!

Meh, no one really used the Konaki soft parts, just the motors for the most part.

Fuknmovin
03-23-2010, 11:22 PM
Got the box done, just need to cut the hole!!

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0323001904.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0323001904a.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0323001904c.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0323001905.jpg

Toone
03-23-2010, 11:30 PM
port seems tiny but it looks good

Fuknmovin
03-23-2010, 11:37 PM
1.75 CF = 28sqin. port. this is 27.5" so not tiny...Thanks though!

kmanian
03-23-2010, 11:45 PM
update when you get done

looks good

RAM_Designs
03-23-2010, 11:46 PM
Port is plenty big for that size box. Looks good, hope it performs as well as it looks.

Fuknmovin
03-24-2010, 01:36 AM
Thanks! Me too, I am pretty happy with the build so far. I need to get some carpet for it and wrap it up before I put it in the truck. Amp and sub should be here in a week or so.

Fuknmovin
03-24-2010, 07:21 PM
Ordered some carpet in what looks like the exact same color as my truck's interior, hopefully it is at least close....Should I move this to the build logs?? Can somebody do that for me?

DonH
03-24-2010, 07:29 PM
not a fan of the port bro..... could cause really im proper loading capabilities on the sub.....

Fuknmovin
03-24-2010, 07:38 PM
Think so? I was considering doing a divider wall between the sub and the port to direct the air properly. I figure I can add it later if i have to... I will try it first the way it is. It has really good resonance though, I don't think the tuning is going to be off but I will test and then tune it up later. I silicon-d the front baffle instead of gluing it so I can come back later to fix any little defects. Hopefully it works ok.

Fuknmovin
03-25-2010, 07:32 PM
Looks like The Underground sub is coming along nicely, he just sent me a couple pics! The best part is its only 5.75" deep! Just right for my box! Custom Baby...

http://i116.photobucket.com/albums/o29/fuknmovin/CIMG1664.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/CIMG1665.jpg

Fuknmovin
03-26-2010, 12:54 PM
not a fan of the port bro..... could cause really im proper loading capabilities on the sub.....

I don't know, I really don't think it will be a problem. If you think about it, air pressure in and enclosed space is linear, ALWAYS its a law of physics. If you add pressure to a space (sub compressing back) you add that same pressure to the whole space not just the part closest to the sub, then the vent will do its thing. It should be fine but I will find out soon enough sub should be here in about 4-5 days I figure.

Fuknmovin
03-27-2010, 11:24 PM
Well, I got the box fitted in the truck and devised the method to move the seat forward the 1" I needed to get the fit. Obviously I normally have the seat down so I am not concerned with the sound when the seat is folded up and blocking the port. I may flip the box over to make it so its not blocked by the seat but then it may be obscured a bit by the brackets for the seat so I most likely will not. I never have the seats up anyway as I bring my dogs around all the time..

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0327001759.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0327001759b.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0327001829.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0327001829a.jpg

Fuknmovin
03-31-2010, 01:13 PM
Got some more done, getting close to finished! Just waiting on carpet and sub!

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0331000804.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0331000805a.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0331000805b.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0331000805c.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0331000805d.jpg

Fuknmovin
04-07-2010, 07:56 PM
Got the sub installed and amps finished wired up, just need to break in the sub and see what she will do! Then it all comes apart for final finish work and carpet!
I will post pics tonight of the install thus far. For what its worth, I might be selling these in a slightly modified version for you fellow crew cab guys that want to retain your seats and still have some kickin bumps! I am VERY pleased so far, its actually louder than my previous setup of 6 cheaper 10's with 2200 watts sealed!!

Fuknmovin
04-12-2010, 01:36 PM
Got a bit more done, got the sub out again, carpeted the box and reinstalled it, LOVIN the sounds, this little guy slams for what it is, I am getting 130DB on my little meter, not a TL by any means but at least close, it was within a couple DB of the TL last time I compared it. Here is a few Pics...

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0410001756.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/downsized_0410001850a.jpg

http://i116.photobucket.com/albums/o29/fuknmovin/Mobile%20Uploads/0410001943.jpg

Fuknmovin
04-12-2010, 03:50 PM
I just turned it up a bit on a good song, Get LOW by Luda, DAM this little bugger flexes the roof like crazy! I need to get a vid of it, like an inch up and down with the naked eye! Bangin little setup!