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post #121 of 178 Old 03-20-2017, 01:18 PM
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Lol. You could act like your playing it to be all romantic and then ......BOOOOOOOOM????

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Lol I know when we played it i was like what the heck is this and than the bass hit I was like

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It worked on me too. How embarrassing.
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post #122 of 178 Old 03-20-2017, 02:36 PM
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Explaining your subwoofer build/ size to the "uninitiated" . . .

Me: it's BIG!

Them: How big is it?

Me: How big is your refrigerator? 19, 22, maybe 25 cubic feet?

Them: I dunno. fairly normal sized, i guess.

Me: So take a brief moment and try to visualize your refrigerator 1 1/2 times or maybe even twice as big. As it's in your living room.

the variety looks you will get are priceless.

worth all the effort, fussing and expense.

especially when you fire it up . . .

eschew mediocrity
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post #123 of 178 Old 03-20-2017, 03:24 PM - Thread Starter
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This is driving me nuts that I can't figure out panel c

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post #124 of 178 Old 03-20-2017, 03:46 PM
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This is driving me nuts that I can't figure out panel c

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Whats up with C?



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post #125 of 178 Old 03-20-2017, 03:49 PM - Thread Starter
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All my measurements are right except for 7 and 8 and can't figure why there a quarter in off

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post #126 of 178 Old 03-20-2017, 03:49 PM - Thread Starter
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10 is on and all the surrounding measurements

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post #127 of 178 Old 03-20-2017, 03:52 PM
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I'm guessing your long on 7 and 8....
due to plywood not being a true 3/4"

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post #128 of 178 Old 03-20-2017, 03:53 PM
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Could it be that your panels are not completely 3/4" thick? That would change that measurement

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post #129 of 178 Old 03-20-2017, 04:00 PM - Thread Starter
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Actuality short but every other measurement is on

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post #130 of 178 Old 03-20-2017, 04:01 PM - Thread Starter
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Messaged John to see off its going to make a big difference

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post #131 of 178 Old 03-20-2017, 04:05 PM
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Bold below quoted from John

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Originally Posted by LTD02 View Post
i've copied the important information into this post so that it is all in one place. if i left anything out, please let me know and i will add it. thanks...


- good bracing is required.


- i'm not sure if the black diagonal deflector at 14/15 actually does anything other than serve as a brace.


- side panels are 36" x 80". best practice would be to draw the panel layout onto a side piece.


- the measurements will vary by a slight amount depending on the precise thickness of the wood panels ("three quarter inch plywood" in many cases is 23/32). that won't affect performance in any way, just be aware of it where you want the panels to line up just right (on the outside of the cab for example).


- try to get measurement 1 as close as possible to 3.23 inches. that measurement sets the "compression ratio", which for this horn is actually pretty low, so there is actually some wiggle room there. but still, if only one measurement on the entire horn is 'perfect', that should be it.


- a removable panel could be cut in the side for access to the driver if that is desired.


- this aspect of the design process actually required the most time/work. if somebody could double check these measurements, i'd appreciate it.


one bracing strategy--single row of 6" braces down the center of the cab. two rows might be even better, but more work. doubling up on the first brace in front of the driver might not be a bad idea.

.

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post #132 of 178 Old 03-20-2017, 04:07 PM
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Quote:
Originally Posted by hd0823 View Post
Actuality short but every other measurement is on

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I'm very surprised at your measurement being short
What is your F board?

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post #133 of 178 Old 03-20-2017, 04:10 PM - Thread Starter
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It's right . It's actually the 7 and 8 distances that are off not the actual panel c but 10 is dead on it doesn't make sense to me

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post #134 of 178 Old 03-20-2017, 04:12 PM
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I maybe would have cut some scrap 'spacers' at the dimensions of numbers 2, 4, 8, and 10 just to temporarily space things out and be sure the panels are right on.
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post #135 of 178 Old 03-20-2017, 04:15 PM
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In the glass business we use the term "split the difference", so nothing tracks too far off. If one dimension is off out of four, adjust them all so there equally off just 1/32 or 1/64 and that should be better then one being off 1/4". Just another $0.02.
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post #136 of 178 Old 03-20-2017, 04:30 PM
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Do you have C at 90 degrees to F?
Just throwing ideas out there.... but its probably going to be a split the difference like Jk7.2 said

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post #137 of 178 Old 03-20-2017, 04:36 PM
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I concur . .the layout for the first 1 due to .702 thickness for the sanderply,

challenging . . but not insurmountable

Just think about how easy the next 3 will be . .

(not so dissimilar to having /raising kids -YMMV)

love the pics

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post #138 of 178 Old 03-20-2017, 05:33 PM - Thread Starter
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Do you have C at 90 degrees to F?
Just throwing ideas out there.... but its probably going to be a split the difference like Jk7.2 said
Yeah it's at 90 degrees to f. Probably just going to split the difference it will throw a few other measurements off but 7 won't be as far off. 8 is actually only off by about 1/8

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post #139 of 178 Old 03-20-2017, 06:10 PM
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I still think its because your material is less than 3/4" thick. The measurements from edge to edge are assuming the material is 3/4"

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post #140 of 178 Old 03-20-2017, 06:14 PM
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Quote:
Originally Posted by Jk7.2 View Post
In the glass business we use the term "split the difference", so nothing tracks too far off. If one dimension is off out of four, adjust them all so there equally off just 1/32 or 1/64 and that should be better then one being off 1/4". Just another $0.02.
Nother glass guy, eh? Small World..

Far as construction advice, I agree with the rest, split the diff...

On another note: These fuggers gon'rock!
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post #141 of 178 Old 03-20-2017, 06:38 PM
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Yeah it's at 90 degrees to f. Probably just going to split the difference it will throw a few other measurements off but 7 won't be as far off. 8 is actually only off by about 1/8

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My OCD got the better of me....

The addition of Ply (5*3/4) + 2 (6 1/8) + 4 (6 1/2) + 8(9 1/8) + 10 (10 13/16) = 36 5/16

The thinner ply is 23/32" which would bring that down to 36 5/32" (just over an 1/8th)

F is 36" thus the reason you measured 8 as short

This doesn't take into account the angle that the ply in on... but really that's splitting hairs

Hope that makes sense.

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post #142 of 178 Old 03-20-2017, 07:01 PM
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It will make perfect sense

when he fires up all 4 at the same time . .

finishing #1 very important . .

sitting down, listening "raw", and integrating, somewhat, into the system before finishing the other 3,

maybe the only 1 fatal flaw in the plan

(o.k @Fattykidd - that's your cue)

good to see the due diligence for finding that lost 1/8th".

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post #143 of 178 Old 03-20-2017, 07:09 PM
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finish all 4 before you....
Fire it up
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post #144 of 178 Old 03-20-2017, 07:18 PM - Thread Starter
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finish all 4 before you....
Fire it up
Picture or video isn't showing up for me . I'm definitely going to finish all 4 before I fire them up i know of it fire up the first progress will slow dramatically.

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post #145 of 178 Old 03-20-2017, 07:19 PM - Thread Starter
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My OCD got the better of me....

The addition of Ply (5*3/4) + 2 (6 1/8) + 4 (6 1/2) + 8(9 1/8) + 10 (10 13/16) = 36 5/16

The thinner ply is 23/32" which would bring that down to 36 5/32" (just over an 1/8th)

F is 36" thus the reason you measured 8 as short

This doesn't take into account the angle that the ply in on... but really that's splitting hairs

Hope that makes sense.
So would you split the difference or just leave it be

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post #146 of 178 Old 03-20-2017, 07:37 PM
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Quote:
Originally Posted by hd0823 View Post
So would you split the difference or just leave it be

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Split the difference
As noted by John the most critical measurement is #1

And Ya get all four done first
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post #147 of 178 Old 03-20-2017, 07:52 PM - Thread Starter
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Originally Posted by Waterboy77 View Post
Split the difference
As noted by John the most critical measurement is #1

And Ya get all four done first
OK thanks yeah I have measurement 1 dead on

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post #148 of 178 Old 03-21-2017, 01:28 PM
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the difference is probably just the accumulation of panel thicknesses being a little less than 0.75.


if measurements 2, 4, and 10 are all accurate AND the exterior panels are all the way to the edge of the side panels, then you will have lost 5 panels * about .05" per panel of width, which is 0.25"


if you shift panel c over by about half the distance, that would be the easy fix.
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post #149 of 178 Old 03-21-2017, 02:43 PM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post
the difference is probably just the accumulation of panel thicknesses being a little less than 0.75.


if measurements 2, 4, and 10 are all accurate AND the exterior panels are all the way to the edge of the side panels, then you will have lost 5 panels * about .05" per panel of width, which is 0.25"


if you shift panel c over by about half the distance, that would be the easy fix.
Thanks I'll get that moved over tonight when I get home. Hopefully the next 7 stencils go better. Should I figure the next one out for 3/4 and just position the boards in the center of the 3/4

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post #150 of 178 Old 03-21-2017, 02:46 PM - Thread Starter
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Did anyone have trouble getting the pl premium 3 to work with there caulk gun. It was not wanting to come out. Broke my caulk gun after 1 panel

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