Flat Pack rally for SI-18's...will fit other drivers too! - AVS Forum
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post #1 of 59 Old 02-24-2014, 09:00 AM - Thread Starter
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No more SI-18 sealed flat packs available at DIYSoundgroup yet there is hope!

Erich's comment in email:

Someone needs to start a thread on one of the forums so I can see how many boxes are needed. The cabinet company needs to cut at least 25 at a time to do it. As long as there are 20 preorders, I will get them cut.

So the goal is to rally 20 pre-orders for SI-18 baffle.

The SI-18 cut out will fit:

UXL-18
Dayton Ultimax 18
SI-18
LMS 5400 Ultra......I was in process of modifying bracing to accept driver.
There are other drivers too.....so feel free to add to list!

If you are interested in 18.5 inch diameter flat pack cut out, please leave name and number of cabs needed. If we can get 20 pre-orders Erich will have flat packs cut out.

I will start off needing two......I already finished two for Ultimax 18 driver but have switched over to UXL. UXL-18 fits perfect!

Now all we need is 18 more for Erich at Diysoundgroup to get them cut! Sign up Please ASAP!!


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post #2 of 59 Old 02-24-2014, 09:02 AM
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Unless I totally over looked it. Sealed or ported?

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post #3 of 59 Old 02-24-2014, 09:06 AM
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It's sealed.

Given that it fits the UXL-18 I think there will be an ongoing demand for this size.

I've got mine assembled, just wating for my UXL-18 to arrive. smile.gif

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post #4 of 59 Old 02-24-2014, 09:06 AM
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Quote:
Originally Posted by fieroloki View Post

Unless I totally over looked it. Sealed or ported?
I believe this:
http://www.diysoundgroup.com/subwoofer-flatpacks-2/4-sub-flat-pack.html
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post #5 of 59 Old 02-24-2014, 09:06 AM - Thread Starter
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Quote:
Originally Posted by fieroloki View Post

Unless I totally over looked it. Sealed or ported?

Thanks for commenting........fixed original post.

Sealed
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post #6 of 59 Old 02-24-2014, 09:27 AM
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i bought the cutout of dayton 18" for my (2) UXL, from my understanding it still fits it, just need to take off the surround gasket.
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post #7 of 59 Old 02-24-2014, 10:17 AM - Thread Starter
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Quote:
Originally Posted by scotsman8 View Post

i bought the cutout of dayton 18" for my (2) UXL, from my understanding it still fits it, just need to take off the surround gasket.

In my opinion, forcing driver to fit is not the way to go......

UXL18 is 18.46 inches........gasket fits without forcing.

HO cut out is 3/16 th inche less......not a good option IMHO. Forcing driver into recessed baffle is not going to happen for me
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post #8 of 59 Old 02-24-2014, 11:08 AM - Thread Starter
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Maybe Erich can do an early run on flat packs for Ultimax 18's which baffle is much larger than HO driver......
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post #9 of 59 Old 02-24-2014, 11:13 AM
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Quote:
Originally Posted by doublewing11 View Post

In my opinion, forcing driver to fit is not the way to go......

UXL18 is 18.46 inches........gasket fits without forcing.

HO cut out is 3/16 th inche less......not a good option IMHO. Forcing driver into recessed baffle is not going to happen for me

there is a ****** plastic gasket that are junk and dont hold seals on all these subs u need to rip it off anyways to get a good seal . so the driver instantly becomes more then 1/4th smaller
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post #10 of 59 Old 02-24-2014, 11:14 AM
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Can't think of the name of the bit, but seems like he might be able to customize/route out the baffle for you guys.

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post #11 of 59 Old 02-24-2014, 03:47 PM
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Quote:
Originally Posted by doublewing11 View Post

Maybe Erich can do an early run on flat packs for Ultimax 18's which baffle is much larger than HO driver......

The 18" Ultimax isn't that much bigger than the HO woofer. Maybe 1/8". I have the frame and it would fit in the HO cut out if it was pushed in hard. But there will be a separate box for the Ultimax either way because I think the internal braces need to be pushed back just a bit more for that woofer due to the thicker magnets.
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post #12 of 59 Old 02-24-2014, 04:58 PM
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Quote:
Originally Posted by Erich H View Post

The 18" Ultimax isn't that much bigger than the HO woofer. Maybe 1/8". I have the frame and it would fit in the HO cut out if it was pushed in hard. But there will be a separate box for the Ultimax either way because I think the internal braces need to be pushed back just a bit more for that woofer due to the thicker magnets.
I guess that would probably be your feelings for the UXL-18 also since thats over 9" deep
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post #13 of 59 Old 02-24-2014, 05:06 PM - Thread Starter
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Quote:
Originally Posted by Erich H View Post

The 18" Ultimax isn't that much bigger than the HO woofer. Maybe 1/8". I have the frame and it would fit in the HO cut out if it was pushed in hard. But there will be a separate box for the Ultimax either way because I think the internal braces need to be pushed back just a bit more for that woofer due to the thicker magnets.

If the specs are correct at Parts-Express......big if.......the current box would fit no problem. Heck, I was shaving off 3/4 inch on bracing and cutting out middle two braces and move to side to fit LMS-U. The UM is only 9-1/2 inches and LMS-U is 11.5 inches. Should fit.....no problem.
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post #14 of 59 Old 02-24-2014, 06:23 PM
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I will need 2 for Dayton Ultimax 18's once they are available. Anyone know if the 4/30/14 date on these things being available is accurate? Typically are these estimations on point or do they miss the mark?

These next 9 weeks can't go by fast enough... I want these new 18's bad!

Erich will the box internal volume for the Ultimax 18's be any different than the other 4ft3 box you have available for the current Dayton 18's?
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post #15 of 59 Old 02-24-2014, 06:32 PM - Thread Starter
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Originally Posted by BrutalBodyShots View Post

I will need 2 for Dayton Ultimax 18's once they are available. Anyone know if the 4/30/14 date on these things being available is accurate? Typically are these estimations on point or do they miss the mark?

These next 9 weeks can't go by fast enough... I want these new 18's bad!

Erich will the box internal volume for the Ultimax 18's be any different than the other 4ft3 box you have available for the current Dayton 18's?

Good question.........

I have four UM's still on order and need to cancel. November 27th was my order date but lost patience with move back date. I now have four UXL's coming and Ultimax box would be better than Flat pack for HO driver.....

Maybe we can convince Erich to make an early run of UM flat packs.........if not, then I'll put my sheets of BB to good use......biggrin.gif
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post #16 of 59 Old 02-25-2014, 05:34 AM
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What I would desperately like to see is a ported flat pack, or even just a ported baffle for the SI 18HT and Dayton HO18. Perhaps something that is 8cuft to 10cuft tuned to 18hz or so. I honestly don't like this trend of sealed enclosures, but hey, that's just me! I say this because the output, and impact differences between a sealed SI 18HT, (or Dayton HO18), is pretty substantial, especially around the tuning frequency! If we had some ported flat packs available, then I would take a minimum of 4!
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post #17 of 59 Old 02-25-2014, 06:44 AM - Thread Starter
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Originally Posted by Martycool007 View Post

What I would desperately like to see is a ported flat pack, or even just a ported baffle for the SI 18HT and Dayton HO18. Perhaps something that is 8cuft to 10cuft tuned to 18hz or so. I honestly don't like this trend of sealed enclosures, but hey, that's just me! I say this because the output, and impact differences between a sealed SI 18HT, (or Dayton HO18), is pretty substantial, especially around the tuning frequency! If we had some ported flat packs available, then I would take a minimum of 4!

Fine........there are plenty of Marty this, Marty that, Marty for breakfast, lunch , dinner, Marty to Disneyland, Super Bowl..........Marty in the Universe.

Some prefer sealed..........leave it at that. This thread is not a breeding ground for ported but to help those who need larger diameter baffles other than HO.

Just saying.....
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post #18 of 59 Old 02-25-2014, 06:59 AM
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Quote:
Originally Posted by doublewing11 View Post

Fine........there are plenty of Marty this, Marty that, Marty for breakfast, lunch , dinner, Marty to Disneyland, Super Bowl..........Marty in the Universe.

Some prefer sealed..........leave it at that. This thread is not a breeding ground for ported but to help those who need larger diameter baffles other than HO.

Just saying.....
Dude...where the hell is this coming from?? No mention of Marty at all in this thread other than in the user's Id!!
You are too funny!! Lol
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post #19 of 59 Old 02-25-2014, 07:07 AM
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post #20 of 59 Old 02-25-2014, 07:15 AM
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Quote:
Originally Posted by Martycool007 View Post

What I would desperately like to see is a ported flat pack, or even just a ported baffle for the SI 18HT and Dayton HO18. Perhaps something that is 8cuft to 10cuft tuned to 18hz or so. I honestly don't like this trend of sealed enclosures, but hey, that's just me! I say this because the output, and impact differences between a sealed SI 18HT, (or Dayton HO18), is pretty substantial, especially around the tuning frequency! If we had some ported flat packs available, then I would take a minimum of 4!

I was going to post this earlier but then said auh the h with it. I guess I’ll post since AG has the corn and doub started things off.

I would like to see that too. As far as the sealed trend goes though, that’s not really the case. Sealed has been around just as long as vented I would presume and if done correctly is a very nice option. I could name some benefits of sealed but then that’s been covered in plenty of other threads. Many users prefer sealed for their own reasons and different circumstances. While I generally gravitate towards vented in two different forms, I can assure you those in the know could give a R A what I like, they know what they like, and they have their reasons. This isn’t meant to be snarky, it’s just the reality of the situation.

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post #21 of 59 Old 02-25-2014, 07:31 AM - Thread Starter
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Well,hopefully this doesn't become a battle of sealed vs. ported........btw, I'd like to see a lot of things like world peace but like that's going to happen.

The goal of this thread is simple....have Erich cut some more sealed SI-18 baffles...plain and simple. biggrin.gif
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post #22 of 59 Old 02-25-2014, 07:41 AM
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The goal of tis thread is simple....have Erich cut some more sealed SI-17 baffles...plain and simple. biggrin.gif

Whoops! I thought I was in the AG XXXXX PR thread. Please forgive.. I'll run along now then smile.gif EDIT> I did spend a few $$ on a BASSIS/LT to get the best out of sealed and wouldn't give up the option. wink.gif

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post #23 of 59 Old 02-25-2014, 08:07 AM
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The reason you see lots of sealed these days is because it is pretty easy, and far more economical to overcome the db differential between sealed and ported, with these giant subwoofers. 10 years ago, sealed wasn't nearly as common and rarely seen in serious HT builds, except by those who deep pockets who could build massive arrays. Those were the days when the Adire Shiva was very popular. People ported that guy all day long (and if not, the Tempest in sonotubes) and rarely ran sealed. It wasn't economical to do 12's sealed while trying to achieve <20Hz for HT use. Some did go sealed, but that was more so with IB Maelstrom builds, or HE15/Tumult LT builds.
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post #24 of 59 Old 02-25-2014, 08:53 AM
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^^^ +1 So I make another Ed McMahon post once again. )
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post #25 of 59 Old 02-26-2014, 12:24 AM
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Well s**t.

I go to DIYSG to order me up some 4cuft flatpacks and don't ya know it there are no 18" baffle options. I figure it was just the SI18 one that was OoS.

Anyway. I need at least two, maybe four.

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post #26 of 59 Old 02-26-2014, 01:57 AM
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What about PE Scott? http://www.parts-express.com/knock-down-mdf-40-cu-ft-subwoofer-cabinet-for-dayton-audio-18-reference-series-ho-subwoof--300-7079

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post #27 of 59 Old 02-26-2014, 07:18 AM - Thread Starter
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That FP is for HO......

The SI-18's outside/inside diameter would perfectly fit LMS-U with a little bit of bracing modification. If my four UXL's don't work out for me, then having a drop and play option is nice to have........if Erich doesn't have the means to produce more, I have 18 mm Baltic Birch starring at me. wink.gif
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post #28 of 59 Old 02-26-2014, 07:25 AM - Thread Starter
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Quote:
Originally Posted by Erich H View Post

The 18" Ultimax isn't that much bigger than the HO woofer. Maybe 1/8". I have the frame and it would fit in the HO cut out if it was pushed in hard. But there will be a separate box for the Ultimax either way because I think the internal braces need to be pushed back just a bit more for that woofer due to the thicker magnets.

Thanks Erich,

That 1/8 maybe all the difference.....

Specs on UM-18 say OD 18.5 inches and ID 17.0 inches.......are those numbers correct?
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post #29 of 59 Old 02-26-2014, 07:51 AM
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Quote:
Originally Posted by Scott Simonian View Post

Well s**t.

I go to DIYSG to order me up some 4cuft flatpacks and don't ya know it there are no 18" baffle options. I figure it was just the SI18 one that was OoS.

Anyway. I need at least two, maybe four.


Don't worry, more will be cut soon. But the ones getting done will be for the 18" Ultimax and the 18" RS HO model.

I would get more cut for the SI, but there would need to be some type of list of people saying how many they needed because I'd hate to get a bunch cut and then just have them sit because the woofer is no longer being sold.

And I'm not sure what other popular woofer will fit the SI-18 cut out.
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post #30 of 59 Old 02-26-2014, 08:50 AM - Thread Starter
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Quote:
Originally Posted by Erich H View Post

Don't worry, more will be cut soon. But the ones getting done will be for the 18" Ultimax and the 18" RS HO model.

I would get more cut for the SI, but there would need to be some type of list of people saying how many they needed because I'd hate to get a bunch cut and then just have them sit because the woofer is no longer being sold.

And I'm not sure what other popular woofer will fit the SI-18 cut out.

Thanks Erich,

Do you know off hand Ultimax18 FP outside and inside diameters being cut? I have two SI-18 boxes now and would like two more all for UXL-18 driver.

SI-18 FP baffles are perfect for UXL-18 driver.
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