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View Full Version : 9.5ft^3**243in^2 port**18" Destroyer**32Hz



PhatTonyDeMarco
02-15-2007, 03:05 PM
Well, I am at it again with a new enclosure for my 18" Destroyer. There are no t/s parameters for this sub, so I am basically building in the dark, which is why I have built five or six enclosures in the past couple months for this driver.

This will be the largest of the boxes I have built, still trying to see what it likes. I am looking for the lows here, so I am tuning low and increasing airspace. I chose this massive amount of port to see what kind of flexing I can get out of it:D

The build should take place on Saturday, as long as I get my tax return on time tomorrow...

Here is a quick sketch-up of the box. The box will be in the back of my 2dr Cherokee, and will extend up to about six inches from the ceiling, eliminating my back window.

http://img64.imageshack.us/img64/7008/bnox1cj3.jpg

SiX
02-15-2007, 03:07 PM
I know what they like... ;)

PhatTonyDeMarco
02-15-2007, 03:09 PM
Yeah bro, I'm pretty sure I pmed you about it; since you had the other one... I don't think you got back to me.

No help?

SiX
02-15-2007, 03:25 PM
Yeah bro, I'm pretty sure I pmed you about it; since you had the other one... I don't think you got back to me.

No help?

eh, this forum ***** as far as pms go.
I'll help in any way I can.

I do know that with the lower tuning, the greater the airspace and port area help ALOT. I put one in a box for an 18" HC I had - 6.5 cuft after disp tuned to 35. It got a lil peaky and felt like it was being strangled on the lows. So I tested the other in a 7.5 cuft box tuned to 32 with 75 sq in port. Dramatic results to the ear and way more flex. As of now, I am 1/2 done building the final resting place for both (I hope). 16.3 cubes after disp, 276 sq in of port, tuned to 28hz, sub and port up (port against rear hatch of the Trailblazer)

Lemme know how that box treats you - I might let mine have a few more cuft if it helps...

SQBubble
02-15-2007, 03:31 PM
hope you got some painkiller for your back...:up2somet:

SiX
02-15-2007, 03:33 PM
hope you got some painkiller for your back...:up2somet:

They massage the pain away. :D

kickerlivinloud
02-15-2007, 03:38 PM
I hope your car is up to the task. You'll be beating the snot out of it with that setup!




Jon

squeak12
02-15-2007, 05:25 PM
Id dbl the whole enclosure and mount the sub facing the front.

SHiZNiLTi
02-15-2007, 06:31 PM
I do know that with the lower tuning, the greater the airspace and port area help ALOT. I put one in a box for an 18" HC I had - 6.5 cuft after disp tuned to 35. It got a lil peaky and felt like it was being strangled on the lows. So I tested the other in a 7.5 cuft box tuned to 32 with 75 sq in port. Dramatic results to the ear and way more flex. As of now, I am 1/2 done building the final resting place for both (I hope). 16.3 cubes after disp, 276 sq in of port, tuned to 28hz, sub and port up (port against rear hatch of the Trailblazer)

Lemme know how that box treats you - I might let mine have a few more cuft if it helps...

So what was the port area on the 6.5 cuft box in comparision to the 7.5 cuft box, was the same sub used in both tests?

These results you guys get are very interesting to me because I'm pretty much in the same boat that you guys are.

I'v got my 18" BTL in 6.7 cubes @ 31hz, but it feels "like it was being strangled on the lows" I want to try the same design that your doing Phatty, but a little smaller, only about 8.0 cuft after sub. SiX and Phatty do you guys have msn, aim or xfire?

Fast1one
02-15-2007, 07:05 PM
Holy cow thats a lot of port...in for results/pics

BassAddictJ
02-15-2007, 07:10 PM
good luck

SiX
02-15-2007, 07:14 PM
So what was the port area on the 6.5 cuft box in comparision to the 7.5 cuft box, was the same sub used in both tests?

These results you guys get are very interesting to me because I'm pretty much in the same boat that you guys are.

I'v got my 18" BTL in 6.7 cubes @ 31hz, but it feels "like it was being strangled on the lows" I want to try the same design that your doing Phatty, but a little smaller, only about 8.0 cuft after sub. SiX and Phatty do you guys have msn, aim or xfire?

I believe there was 75 on that as well. Yes the same sub was used in both tests. First a 18" HC in each box - then a 18" Destroyer.

My AIM is: SiXStatiC

PhatTonyDeMarco
02-15-2007, 09:20 PM
Id dbl the whole enclosure and mount the sub facing the front.
I will be using either threaded rod or wooden dowels for extensive bracing, not sure which yet but I think doubling up the entire enclosure is not needed.

And face the sub forward, meaning on the same plane as the port or the other side, towards the dash? Facing it back with the port always gives me some nasty hatch rattles, and doesn't gain me much, if anything.

I have never been so excited for a build, I can't wait to hear this:)

Pics and possibley vids should be up by Sunday.

ngsm13
02-15-2007, 09:22 PM
I'd go with less port...

:fyi:

nG

squeak12
02-15-2007, 09:24 PM
On the same plane as the port. The sub wont have much room to breath up there and it will rattle the roof like a tin can. Threaded rod if your not doubling up on the largest planes.

folgrz
02-15-2007, 09:42 PM
wow that looks like its gonna be insane

ngsm13
02-15-2007, 10:05 PM
Yeah, I'd also rearfire.

nG

PhatTonyDeMarco
02-18-2007, 07:13 AM
Okay, had a pretty productive Saturday... I got all my cuts made, and I am just about completed with the assembley of the pieces. I still have to attatch the double baffle and the bottom, and make the cutout for the sub.

I am in love with my router; I got a flush trim bit and a roundover bit, and it makes everything look so perfect. I probably won't carpet this big thing, just going to sand her down and round the edges over; should look pretty good...

I am going to add threaded rod for a little bracing as well, one from side to side and two rods going front to back.

I am so excited about this box, I can't wait to get it in. Hopefully I can finish it up today, if it stops raining later on... Install will be tonight or early in the week.

I just got home from work, so I'm tired as ****. Heres a few pics of what I have so far, I will take better ones of the final thing.

http://img294.imageshack.us/img294/4862/pict0038tg2.jpg

http://img72.imageshack.us/img72/8400/pict0039xy9.jpg

http://img294.imageshack.us/img294/37/pict0040sm6.jpg

http://img294.imageshack.us/img294/7056/pict0042nf0.jpg

http://img294.imageshack.us/img294/2633/pict0043rw6.jpg

theCybe
02-18-2007, 12:51 PM
http://img294.imageshack.us/img294/4862/pict0038tg2.jpg
box = bad luck?

kotec123
02-18-2007, 12:55 PM
that cat=ftw

Mitch86
02-18-2007, 12:57 PM
You could harbor a family of asians in that box. :fyi:

BassAddictJ
02-18-2007, 01:08 PM
this is gonan sound nice with meh old motor :) wangage for you :

PhatTonyDeMarco
02-18-2007, 03:36 PM
Here is a shot of the interior, got the threaded rod in this afternoon. I still need to cut the second cutout for the double baffle and put the bottom on; then it's on to sanding and rounding:)
http://img388.imageshack.us/img388/3241/pict0001um2.jpg

Don't worry about that overhang on the baffle, that's what the flush trim bit is for:yumyum:
http://img388.imageshack.us/img388/7253/pict0002jz7.jpg

Here is my spacious work area:p:
http://img388.imageshack.us/img388/573/pict0003wk4.jpg

Chevyaudio
02-18-2007, 04:24 PM
hmmm...what size all thread is that?

looks kinda puney...

PhatTonyDeMarco
02-18-2007, 04:26 PM
hmmm...what size all thread is that?

looks kinda puney...
It's 1/4", all they had was that and half inch, which was way too big...

Chevyaudio
02-18-2007, 05:52 PM
blah...I use 5/8"

PhatTonyDeMarco
02-18-2007, 07:18 PM
blah...I use 5/8"
That seems unnecessarily large, I have never seen anyone use rod that large.

Well it is complete, and I am extremely happy with the finished product. This is by far my sexiest enclosure, and this has my most perfect cuts:D Round edges FTW...

http://img412.imageshack.us/img412/937/pict0001uu0.jpg


Here's a recent shot of the Jeep, finally got it tinted about a month ago. Limo on the back and 15% on the doors.
http://img488.imageshack.us/img488/5391/jeep2wp0.jpg

It will go in tomorrow, need to get a buddy over here to give me a hand. It must weigh near 100lbs...

Questions, comments, concerns? Bring on the criticism...

mazdakid
02-18-2007, 08:16 PM
go put it in tonight, 100lbs isnt that heavy

PhatTonyDeMarco
02-18-2007, 10:15 PM
go put it in tonight, 100lbs isnt that heavy
If it was a 12'' x 12'' x 12'' box, then it would be easy. But there is no way I can grip it, let alone carry it out the door on my own.

She'll be in by noon tomorrow:D

I'm off to work now, let's get some more comments on this ****...

Calikid
02-18-2007, 10:19 PM
i have to carry stuff that weights 120 + at work and im not that big.

Nukedsodapop
02-18-2007, 10:43 PM
but it's hard to get a grip on, I had to carry this one upstairs to my room from the garage,

http://img.photobucket.com/albums/v700/Nukedsodapop/DSC00001.jpg

it ****** so much

coolahan
02-19-2007, 12:29 AM
yah yah you dragged it.

SHiZNiLTi
02-19-2007, 09:19 PM
http://img412.imageshack.us/img412/937/pict0001uu0.jpg

It will go in tomorrow, need to get a buddy over here to give me a hand. It must weigh near 100lbs...

You get it in yet, or still trying to find someone help load it up :D

PhatTonyDeMarco
02-20-2007, 07:54 AM
Yup I got it in yesterday. I have to say, I am unhappy with it. The huge port area was just for fun to see what kind of result I would get, and it isn't a good one. It hits the lows amazingly, it is by far the best sounding enclosure I have had for this woofer. However, it just isn't loud enough; it just doesn't have that authority that this 18 should. So, I am going to rebuild, 9.5 cubes with five 4" aeros I have from a previous box. I am hoping it will get just as low, while getting much louder...

All in all, it was fun and I have no complaints. I love to build, so it will just be another thing to do.

SHiZNiLTi
02-20-2007, 10:19 AM
Interesting, so 25sq.in. of port per cuft is defiantly way too much :p When you rebuild are you going to cut down on the cuft at all, or do you think there was no output just due to the massive amount of port area?

Can you list what the other enclosures are that you've built for this 18? include port area and cuft.

Thanks!

PhatTonyDeMarco
02-20-2007, 04:43 PM
Interesting, so 25sq.in. of port per cuft is defiantly way too much :p When you rebuild are you going to cut down on the cuft at all, or do you think there was no output just due to the massive amount of port area?

Can you list what the other enclosures are that you've built for this 18? include port area and cuft.

Thanks!

I actually got lazey today and just decided to chop off the port on this enclosure and add the aeros; so now it is 9 cubes @ 28Hz with five 4" aeros. If I get a chance to get her in tonight I will let you know how it goes.

I have built so many boxes for this sub...

6 cubes @ 35Hz with 70 inches of port
4.5 cubes @ 35Hz with the five aeros
7 cubes @ 37Hz with 120 inches of port
6.5 cubes @ 34Hz with 160 inches of port
and now I can add the 9.5 cubes @ 32Hz with 243 inches of port to the list

The 6.5 cubes with 160 inches of port was probably the loudest so far, and the box with the aeros had the best SQ by far. I don't have a mic, or access to one, so SPL is based on what I can tell by ear...

If this doesn't sound good, I think I'll save for a BTL. At least I can get t/s parameters for that, and it won't cook any time soon:yumyum:

mazdakid
02-20-2007, 06:04 PM
should cover the sub hole on top, put it on the same side as the sub, and face it back or maybe it would sound ok with both facing up too

PhatTonyDeMarco
02-20-2007, 07:48 PM
should cover the sub hole on top, put it on the same side as the sub, and face it back or maybe it would sound ok with both facing up too
I have tried all different firing positions, and sub up with port back has always been the loudest.

I got the aero box in tonight, and it is amazing. The lows are ball shaking...

I think my next build will be three 6 inchers. :)

mazdakid
02-20-2007, 08:07 PM
i just thought with it that far up towards the roof it would be that great facing up

SHiZNiLTi
02-20-2007, 08:08 PM
Cool, why not four 6 inchers, that would give you 113sq.in. of port? You think 85sq.in.(three 6 inchers) of port area is better when your at that big of a box?

I was planning on doing my new box @ 8 cubes with sub up and (4) 6" aeros back.

Can you takes of the finished box with the ports and make a video showing some lowend flex?

What kinda power are you feeding that 18?

mazdakid
02-20-2007, 08:10 PM
the aeros would have to be extremely long to use 4 6" in 8 cubes, even 9 cubes they would have to be over 25" each

SHiZNiLTi
02-20-2007, 08:55 PM
the aeros would have to be extremely long to use 4 6" in 8 cubes, even 9 cubes they would have to be over 25" each

Your right, I just added it up and I'd hafta do (4) 41" ports to get it tuned at 29hz.

To get 6 inch aero's to work at 29hz I'd hafta use (3) of them side firing each 29.5" long. My box is 37" so that would work perfect.

Hmm im gonna re-think this design now. Maybee sub up and ports to the side could work for me.

The biggest my cutout sheet for top and bottom is 37x27