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post #61 of 234 Old 03-09-2016, 10:06 PM - Thread Starter
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Originally Posted by wlhungdude View Post
I do think they need more bracing. You have some large panels . I keep thinking of the rule of thumb that says no more than 8" between braces. Some of the panels are not braced well enough.

I apologize for tossing this out so late in the build process, but better now than once you have the tops glued on. And yes, I do realize you have 6.... but I just cant look at one box, and feel like it has enough bracing. too many large panels....

my rec: add a brace similar to the port brace, but broken up to fit, along the entire top side. add a "+" brace on the panel directly behind the driver. ... consider front to back bracing, especially in that main center chamber, both above, below, and at the sides of where the driver will be exerting maximum force. Directly coupling the beffle to the back wall if even through dowels....{hint.... use dowels}.... {even better is to incorporate front to back braces "EXACTLY" where the screws used to hold the driver in) that go all the way from front to back

to put that another way... since you haven't added any wood blocks behind the baffle, to better screw into, consider large dowels that go all the way to the back panel. yes, 8 big @ss dowels gued from front to back, into which the driver mounting screws attach. very secure attachment, and increases the rigidity of the box, especially against the natural forces that driver will exert.

basically, you'll never be able to brace it more, than right now... before the box is sealed and done. But you should. It isn't braced well enough, now, <as designed> for the task it will be expected to do... these are the 'original' REXUS, right? they need to be right.

Joseph

not meant to offend, and IMO...and YMMV.

I'm really not trying to nit-pick, as I think this build is simply spectacular. My tip-o-the hat to ddig, for making it happen, and sharing the results here.

Joseph
No worries whatsoever; always appreciate an honest opinion, thanks! Going to bed will figure it out tomorrow haha. I'll be back in touch shortly!
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post #62 of 234 Old 03-10-2016, 09:15 AM
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@wlhungdude
the bracing for the subs is fine as provided in the plan. the suggestion for 8"panel space max without bracing is for speakers where the panel resonances are frequently in the passband of the box itself and even in that application, 8" is overkill. for subs, the panel resonances are out of the passband, so the bacing doesn't have to be spaced as close.

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post #63 of 234 Old 03-10-2016, 09:18 AM
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@ddigler
i don't follow all threads constantly, so to grab my attention, or anyone's for that matter, use the at sign and callsign like this: @LTD02
then i get a notice of a "mention" and will see the post for sure.
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post #64 of 234 Old 03-10-2016, 10:30 AM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post
@wlhungdude
the bracing for the subs is fine as provided in the plan. the suggestion for 8"panel space max without bracing is for speakers where the panel resonances are frequently in the passband of the box itself and even in that application, 8" is overkill. for subs, the panel resonances are out of the passband, so the bacing doesn't have to be spaced as close.
Thanks for clarifying

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@ddigler
i don't follow all threads constantly, so to grab my attention, or anyone's for that matter, use the at sign and callsign like this: @LTD02
then i get a notice of a "mention" and will see the post for sure.
@LTD02 got it; will do thx!
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post #65 of 234 Old 03-10-2016, 02:05 PM
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yep, that'll do it. :-)

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post #66 of 234 Old 03-10-2016, 08:11 PM
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very good to know !! Thanks again, LTD

mods, can we have a 'dislike' button ?
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post #67 of 234 Old 03-11-2016, 03:56 PM - Thread Starter
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The wife put a nice coat of flat black paint on the enclosures for me today! Ready to mount drivers!
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post #68 of 234 Old 03-11-2016, 03:59 PM - Thread Starter
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@LTD02 do I need to use any special gasket around the speaker for the surface mount? The drivers already have what appears to be a gasket that will serve well for the flush mount. Thoughts?
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post #69 of 234 Old 03-11-2016, 04:04 PM
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Quote:
Originally Posted by ddigler View Post
do i need to use any special gasket around the speaker for the surface mount? The drivers already have what appears to be a gasket that will serve well for the flush mount. Thoughts?
Here you go, not sure why your mention didn't work.
@LTD02

------------------------------------------------
Receiver : Denon x5200
Front Stage : L/R - Statements by Jim Holtz
Surround Speakers : Klipsch RF-82II x 4 / RP-280F x 2
Subwooferage : 6 UM18/4 HT18 Subwoofer Log

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post #70 of 234 Old 03-11-2016, 04:11 PM
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For this build I used the gasket on the drivers as supplied,
just make sure your surface is smooth flat and clean
a layer of paint is ok, but preferably not duratex

how are you fastening onto the baffle?
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post #71 of 234 Old 03-11-2016, 04:18 PM
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should be fine if the cab is relatively smooth, just as as asarose (wil) noted.

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post #72 of 234 Old 03-11-2016, 04:24 PM - Thread Starter
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Quote:
Originally Posted by asarose247 View Post
For this build I used the gasket on the drivers as supplied,
just make sure your surface is smooth flat and clean
a layer of paint is ok, but preferably not duratex

how are you fastening onto the baffle?
Thanks for that! I am fastening with inch and a half wood screws. The enclosure is very smooth I think I'm getting a very good seal
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post #73 of 234 Old 03-11-2016, 04:24 PM - Thread Starter
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Originally Posted by LTD02 View Post
should be fine if the cab is relatively smooth, just as as asarose (wil) noted.
Good deal should have them mounted shortly and will post some pics looking good so far!
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post #74 of 234 Old 03-11-2016, 04:30 PM
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Tighten those screws a little bit at a time as if you were doing a cylinder head, go criss-cross and don't be afraid to need to go around several times,
gradual uniformity and control is the key

and a good feel since you'll be doing it byt hand

you may come back the next day and check for loosening due to "bolt stretch" or what everf.

can't wait to see these in action

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post #75 of 234 Old 03-11-2016, 04:39 PM - Thread Starter
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Quote:
Originally Posted by asarose247 View Post
Tighten those screws a little bit at a time as if you were doing a cylinder head, go criss-cross and don't be afraid to need to go around several times,
gradual uniformity and control is the key

and a good feel since you'll be doing it byt hand

you may come back the next day and check for loosening due to "bolt stretch" or what everf.

can't wait to see these in action
Right on will do!
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post #76 of 234 Old 03-11-2016, 04:58 PM
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can't wait to see these in action
I'll second that! Subs are looking good, and I'm looking forward to see your room after you get these setup.
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post #77 of 234 Old 03-11-2016, 05:07 PM - Thread Starter
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Quote:
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can't wait to see these in action
I'll second that! Subs are looking good, and I'm looking forward to see your room after you get these setup.
Tell me about it ready to get these things going can't tell you how many " you're kidding me right? That's way Overkill..." from friends and family LOL

I just tell them 'LTD02 designed it, relax...' They look puzzled and ask who that is? I just walk away... Hehe

Three down three to go!
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post #78 of 234 Old 03-11-2016, 05:41 PM
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I just tell them 'LTD02 designed it, relax...' They look puzzled and ask who that is? I just walk away... Hehe

Three down three to go!
Yeah, I've heard of this LTD02 guy,too. Heard he designs some pretty decent stuff
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post #79 of 234 Old 03-11-2016, 05:58 PM - Thread Starter
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Originally Posted by kevings View Post
Quote:
Originally Posted by ddigler View Post

I just tell them 'LTD02 designed it, relax...' They look puzzled and ask who that is? I just walk away... Hehe

Three down three to go!
Yeah, I've heard of this LTD02 guy,too. Heard he designs some pretty decent stuff
I like it!
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post #80 of 234 Old 03-11-2016, 06:00 PM - Thread Starter
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Done deal! Where are my speakons usps!? LOL
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post #81 of 234 Old 03-11-2016, 06:08 PM
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yes, that guy has helped me spend a bit of money and quality time in a very successful pursuit of woofage excellence

(and just wait until that 32"'er from Mark shows up . . THEN WHAT?!?)

but we all owe @mtg90 a fat TY for thinking about using a pro driver, that 460, for HT,
not usually the first choice / consideration when you look at all the many designs and build threads here

Some SI 18's discontinued. UXL's very rare and LMS D.O.A.

Like Edison, what we don't hear about is the time and effort put into sorting though the catalog of drivers , and a mass of calculations,close but no cigar

In a sense, a reversal of the type of thinking that went into the Marty Mania , initially boxes without too much effort for "non-builders"

So now it's a readily and relatively inexpensive driver in a simple box, making good woofage affordable,a high WAF factor, to the woofage starved HT crowd,
]
think Henry Ford, 2 subs in every HT,
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post #82 of 234 Old 03-11-2016, 06:15 PM - Thread Starter
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Quote:
Originally Posted by asarose247 View Post
yes, that guy has helped me spend a bit of money and quality time in a very successful pursuit of woofage excellence

(and just wait until that 32"'er from Mark shows up . . THEN WHAT?!?)

but we all owe @mtg90 a fat TY for thinking about using a pro driver, that 460, for HT,
not usually the first choice / consideration when you look at all the many designs and build threads here

Some SI 18's discontinued. UXL's very rare and LMS D.O.A.

Like Edison, what we don't hear about is the time and effort put into sorting though the catalog of drivers , and a mass of calculations,close but no cigar

In a sense, a reversal of the type of thinking that went into the Marty Mania , initially boxes without too much effort for "non-builders"

So now it's a readily and relatively inexpensive driver in a simple box, making good woofage affordable,a high WAF factor, to the woofage starved HT crowd,
]
think Henry Ford, 2 subs in every HT,
It definitely seems like a polarizing design. I'm glad to be trying something new and I know regardless I'll be happy with the outcome. Anxious for LTD to walk me through calibration and figure out how to test these and see what I'm actually getting from them.

A huge thank you to @ltd02 and @mtg90. A guy like me doesn't have a chance without people sharing their hard-earned information. Thanks!
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post #83 of 234 Old 03-11-2016, 06:46 PM
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@LTD02 In a bass-off of two of your designs, who wins?

Contender #1 @eng-399 Stone Hammers (4) ht18 @ 16hz tune

or

Contender #2 @ddigler with (6) PA460 of these bad boys

Assuming each system has enough power to get to xmax with very little if any compression..
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post #84 of 234 Old 03-11-2016, 07:11 PM - Thread Starter
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I Don't Know Jack but I think the stone hammers annihilate me! Regardless @LTD02 I would love to see the show down if you are willing!
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post #85 of 234 Old 03-11-2016, 07:13 PM
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@corradizo
that's kind of tough to say. those two combos are certainly in the same ballpark. if the 4x ht18 is run past its rated power and if you happen to have a production unit with performance similar to the data-bass tested driver, then i would guess somewhere around 3db advantage goes to the si from 25-30hz or so. more amp would be required, so more money. with the si, maybe not as much output on the upper end as the 6x pa460 rig.
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post #86 of 234 Old 03-11-2016, 07:19 PM - Thread Starter
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Quote:
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@corradizo
that's kind of tough to say. those two combos are certainly in the same ballpark. if the 4x ht18 is run past its rated power and if you happen to have a production unit with performance similar to the data-bass tested driver, then i would guess somewhere around 3db advantage goes to the si from 25-30hz or so. more amp would be required, so more money. with the si, maybe not as much output on the upper end as the 6x pa460 rig.
thanks man interesting stuff! @LTD02 are my mentions working? Not sure they're working from my phone... Did this one from my PC and it turned blue assuming that means it worked. Wonder why they don't work from my phone?
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post #87 of 234 Old 03-11-2016, 07:34 PM
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yes. that worked. not sure what happened to the other one.

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post #88 of 234 Old 03-11-2016, 08:20 PM - Thread Starter
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@LTD02 , is this what we're going for in ref to damping?
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post #89 of 234 Old 03-11-2016, 08:26 PM - Thread Starter
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Can I use standard female speaker terminals to fit this speakon connector? Not really sure exactly how to connect wiring to this thing... Still waiting for the other five to arrive but messing with this one ATM
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post #90 of 234 Old 03-11-2016, 08:30 PM
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i'm not sure if damping is right word in this case, more like just enough absorption to reduce the standing waves. it shouldn't be free to flop around though or it may end up near/in the port.

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