Knock-down enclosures for sealed, down-firing UXL-18 subs. - AVS Forum
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post #1 of 162 Old 06-22-2014, 04:30 PM - Thread Starter
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eljay's sealed, downfiring UXL-18 subs w/ NU6000DSP

Hi. In this thread, the general consensus was that a cost-effective upgrade to my current ChaseHT SS-18.1s would be a pair of UXL-18s.

Sounds good, but drivers need enclosures and when it comes to building stuff, I have no skills, no tools and no patience. (And if I did have the tools, I'd probably find a way to injure myself. )

I asked Mark at iST about custom cabinets and his reply was:
Quote:
Originally Posted by Mark at iST
There are a couple of guys on that forum who sell knock-down cabinets for the UXL. Perhaps get in touch with them for a decent deal. And yes, they can be used in a downward firing box.
First, a couple of notes:
- I'm restricted by placement (click on my sig to see my current set-up) to a width of 23" and a height of 24". (Depth isn't an issue.)
- I prefer a down-firing orientation. Can this be accomplished given the height restriction?

Next, my questions:
1. Who here at AVS makes optimially-sized sealed enclosures for the UXL-18?

2. What would it cost to get a pair made and shipped to Ottawa, Ontario, Canada K1W 1H4?

3. Ideally, I would like to have to do as little as possible aside from installing the driver, so:
- what would I receive from you; and
- what would I be required to do to complete the assembly?

Thanks!


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post #2 of 162 Old 06-22-2014, 04:37 PM
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I would contact member Chalugadp, he is located in Vancouver and might build something. Also a really great guy. I know he builds Martycubes and ships to the states. Doesn't hurt to see what he says.
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Sub -Updating to Duals with UXL-18"s A bit different
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post #3 of 162 Old 06-22-2014, 04:39 PM - Thread Starter
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OK, thanks, I'll send him a PM.


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post #4 of 162 Old 06-22-2014, 04:57 PM
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sending u a pm in a minute
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post #5 of 162 Old 06-22-2014, 05:05 PM
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Hey Elway,

There is also another guy in the GTA offering up his time right now (think his alias is pokeme or something). . May be a cheaper option then shipping from VCR.

Though Chalugadp makes some excellent enclosures for the UXL (check his video).

Chalugadp.. Do you pack and ship as well?

 

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post #6 of 162 Old 06-22-2014, 05:25 PM
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Quote:
Originally Posted by pbc View Post
Hey Elway,

There is also another guy in the GTA offering up his time right now (think his alias is pokeme or something). . May be a cheaper option then shipping from VCR.

Though Chalugadp makes some excellent enclosures for the UXL (check his video).

Chalugadp.. Do you pack and ship as well?
Yes
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post #7 of 162 Old 06-22-2014, 05:31 PM - Thread Starter
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Quote:
Originally Posted by pbc
There is also another guy in the GTA offering up his time right now (think his alias is pokeme or something). . May be a cheaper option then shipping from VCR.

Though Chalugadp makes some excellent enclosures for the UXL (check his video).
Thanks, pbc. I'm already in discussions via PM with chalugadp. He's got an excellent reputation, so I'm hoping to work something out.


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post #8 of 162 Old 06-23-2014, 08:07 AM - Thread Starter
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chalugadp asked about the clearance required for a down-firing UXL-18. I sent a PM to Mark and I'm waiting on a reply, but I thought I'd post the question here to see if anyone happens to know.

Assuming a recessed driver, would something like 3" be enough? Would it be too much?


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Last edited by eljaycanuck; 06-23-2014 at 08:38 AM.
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post #9 of 162 Old 06-23-2014, 08:11 AM
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Welcome to the club, you are making a great decision.
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post #10 of 162 Old 06-23-2014, 08:36 AM
 
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Shipping will be expensive, you could try to look locally for cabinet builders
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post #11 of 162 Old 06-23-2014, 08:38 AM - Thread Starter
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The price I've been quoted on a pair of enclosures, assembled and shipped, is - IMO - very reasonable.


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post #12 of 162 Old 06-23-2014, 08:45 AM
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Quote:
Originally Posted by eljaycanuck View Post
chalugadp asked about the clearance required for a down-firing UXL-18. I sent a PM to Mark and I'm waiting on a reply, but I thought I'd post the question here to see if anyone happens to know. Assuming a recessed driver, would something like 3" be enough?
3" should be ok. My friend built a pair of down firing ported marty cubes with 3.5" of clearence.
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post #13 of 162 Old 06-23-2014, 08:51 AM
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post #14 of 162 Old 06-23-2014, 09:12 AM - Thread Starter
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OK, so somewhere in the 3-3.5" range. Thanks.

When I asked chalugadp about a down-firing cab, I had in mind something like my SS-18.1 cabs (which I really like) or like the cab you show above. He mentioned that he doesn't build down-firing and so he'd have to add feet.

I'm hoping he can build something like my SS-18 cabs, but if he can't and it's to be cubes with feet, I'm OK with that as long as they look decent...and not like the Chase CS-18.1 "furniture legs" after-thoughts.


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post #15 of 162 Old 06-23-2014, 09:25 AM
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Doesn't a downfiring sub create a bandpass effect that is variable based on the box size, driver specs, and volume of air measured by the distance from the driver to the surface the cabinet will be sitting on? Not sure if any modeling software can account for this.


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post #16 of 162 Old 06-23-2014, 10:02 AM - Thread Starter
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I just got a reply from Mark:
Quote:
Originally Posted by Mark at iST
Height from floor is usually a test-and-see process. Height is usually determined by sound quality, but a general rule would be 3-4 inches.
I'm guessing that 3.5" would be a good compromise height...?


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post #17 of 162 Old 06-23-2014, 10:03 AM
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Quote:
Originally Posted by eljaycanuck View Post
OK, so somewhere in the 3-3.5" range. Thanks.

When I asked chalugadp about a down-firing cab, I had in mind something like my SS-18.1 cabs (which I really like) or like the cab you show above. He mentioned that he doesn't build down-firing and so he'd have to add feet.

I'm hoping he can build something like my SS-18 cabs, but if he can't and it's to be cubes with feet, I'm OK with that as long as they look decent...and not like the Chase CS-18.1 "furniture legs" after-thoughts.
Can you post a pic of the ss-18 cabs for people to see.
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post #18 of 162 Old 06-23-2014, 10:11 AM - Thread Starter
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Sure can!
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post #19 of 162 Old 06-23-2014, 10:18 AM
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If I had to guess I would think that shipping would come in around $100. Greyhound courier ships all across Canada with very reasonable rates, you could also use Sameday courier. We should both a lot through my work and they have very good rates. For example I was going to get two packages shipped from Barrie Ontario, one was 72"x18"x18" and weighed 70lbs and the other package was 37"x37"x8" weighing 40lbs. Too ship both from there to Vancouver was going to cost me $115.
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post #20 of 162 Old 06-23-2014, 11:26 AM
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Those look big enough to stuff a UXL-18 imo. I would just try it first then buy cabs if it does not work out. I do not think the chase subs would be a easy sell anyway but I could be wrong. It looks like the internal volume for the Chase 18.1 is just a hair under 4cf so they should work. 22.5x20x20

The diy sound group 4cf flatpack is 23x20x20.5, for comparison.
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post #21 of 162 Old 06-23-2014, 11:37 AM - Thread Starter
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Quote:
Originally Posted by basshead81
Those look big enough to stuff a UXL-18 imo. I would just try it first then buy cabs if it does not work out.
Too late: chalugadp and I have made a deal.

Mark @ iST has me down for a couple of drivers.

Next thing on the list: An amp (or two) and fan mods.

Quote:
Originally Posted by basshead81
I do not think the chase subs would be a easy sell anyway but I could be wrong.
No, you're most likely correct, but I've always expected to lose a good deal of money re-selling these subs. That said, if the UXLs do the trick, it'll all be water under the bridge.


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post #22 of 162 Old 06-23-2014, 04:00 PM
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Welcome to the club, you are making a great decision.
+1

Congrats eljay...
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post #23 of 162 Old 06-23-2014, 04:17 PM - Thread Starter
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+1

Congrats eljay...
Thanks, guys.

It's funny: Even with this project being mostly HSEDIFY (have someone else do it for you), it's still just a bit outside of my comfort zone - I'm more of a "buy something pre-made w/ full warranty on it, and as plug 'n play as possible" guy.

However, based on your (collective) encouragement and recommendations re. both iST and chalugadp, I have a good feeling about this so far. Fingers crossed...


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post #24 of 162 Old 06-23-2014, 05:37 PM
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post #25 of 162 Old 06-23-2014, 05:39 PM
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Can't wait to hear your impressions of the finished product once you get these up and running Eljay. Data-bass shows a 10 dB advantage in output down low with the UXL-18 driver over what you have...wow that's going to be impressive I would bet. You doing sealed or a MartyCube?

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post #26 of 162 Old 06-24-2014, 04:19 AM - Thread Starter
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How can I say no to that?!

Quote:
Originally Posted by bear123
You doing sealed or a MartyCube?
Sealed and down-firing. Something roughly similar to my current SS-18s.


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post #27 of 162 Old 06-24-2014, 04:47 PM
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Quote:
Originally Posted by nube View Post
Doesn't a downfiring sub create a bandpass effect that is variable based on the box size, driver specs, and volume of air measured by the distance from the driver to the surface the cabinet will be sitting on? Not sure if any modeling software can account for this.
this is my understanding too based on the odd comment here and there. I posed a similar question in this thread though I haven't been able to find anything concrete on this anywhere yet though.

The one post I've seem that seems in the same ballpark was mentioned by @MemX in another thread/forum. He pointed out this thread with regards to the PPSL layout. This struck me as being a v similar concept, i.e. the slot here is formed by firing in driver at a solid surface somewhat larger than the driver itself. It would be interesting to find out if this is indeed how you model such an effect.
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post #28 of 162 Old 06-24-2014, 09:35 PM
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It does create a bandpass effect which will change the response from a native sealed to something more like a ported + sealed. You can model it in WinISD Pro Alpha, but you have to put in your own parameters cuz the program won't compute them for you. Bill Fitzmaurice could probably give some guidance on precisely how to do this. I had another member do it for my dual opposed design.


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post #29 of 162 Old 06-24-2014, 09:38 PM
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Quote:
Originally Posted by nube View Post
It does create a bandpass effect which will change the response from a native sealed to something more like a ported + sealed. You can model it in WinISD Pro Alpha, but you have to put in your own parameters cuz the program won't compute them for you. Bill Fitzmaurice could probably give some guidance on precisely how to do this. I had another member do it for my dual opposed design.
Even with four inches of clearance ?
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post #30 of 162 Old 06-24-2014, 09:51 PM
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Quote:
Originally Posted by chalugadp View Post
Even with four inches of clearance ?
I assume so, but I'm no authority on the subject. Reading here gives a good overview of the subject, but no calculations.


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