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GJALLARHORN vs Little Wrecker - Page 2

post #31 of 77
Patience... It's coming. Waiting for a few things and the time to complete #2.
post #32 of 77

Wow! eek.gif
That sounds like a good time was had by all! I would love to have been around for that. I spend all my waking hours outside and take a break from the forums for the summer. I guess I should have checked in for that project.
Way cool! cool.gif

Thanks for posting that Mike! smile.gif
post #33 of 77
Quote:
Originally Posted by lilmike View Post

If Josh measured at 2M,

Correct. Everything on DB is 2 meters gp outdoors. So for all intensive purposes, use 4.0 full space in HR to compare.
post #34 of 77
For two Ghorns, in 5x5 sheets, you'll need 9 sheets of 18mm and 4 sheets of 12mm.

For the two I'm building, the cost for the wood mentioned above was just shy of $900.
post #35 of 77
Quote:
Originally Posted by lukeamdman View Post

For two Ghorns, in 5x5 sheets, you'll need 9 sheets of 18mm and 4 sheets of 12mm.

For the two I'm building, the cost for the wood mentioned above was just shy of $900.

using baltic birch or something? Doesn't arauco ply work for this?
post #36 of 77
Sure, it will work. You just want wood that is as void free as possible and warp free helps too!

BB usually satisfies both criteria and can be stained to look like furniture as well.
Edited by jpmst3 - 2/20/13 at 8:17am
post #37 of 77
Quote:
Originally Posted by stormwind13 View Post

using baltic birch or something? Doesn't arauco ply work for this?

Arauco ply is only about 7-ply for the 3/4", versus 13-ply for BB. On top of that, Arauco isn't void-free, and I keep hearing from board members that can cause leaks.

Once you glue and screw the side panel on one of these, you're done. If there are any leaks or internal issues caused by cheap wood you have to scrap the entire thing and start over.
post #38 of 77
Well considering it's the most standard ply used in the f20/housewrecker/lilwrecker, it must be good enough. Maybe ricci or lilmike could chime in on this.
post #39 of 77
It will work, sometimes it just isn't as straight and void free.
post #40 of 77
Arauco works fine when properly braced.
Birch is better. How much better? I don't know. I can't afford to use it on cabinets that are "maybes".

Is Baltic Birch $80 a sheet better? Well, that all depends on what you're doing with your subs, as well as what the checking account looks like.

To each their own. I build with what I have on hand...or what I can get for less than $50 a sheet.

I would rather use Arauco than the inexpensive European Birch, and I can get either of these for $40 a sheet typically, though the Arauco used to be $25/sheet.
My current build is using some poplar plywood. So far, it is void-free, and has been very nice to work with.

I will not use Chinese "birch" ever again. Shop-grade birch isn't bad, but the face veneers are THIN. True Baltic Birch? That is definitely my favorite material, just expensive.
post #41 of 77
I just thought 900 was a little steep for wood on a diy sub that's all. I'm definitely excited to come hear it when you are done.
post #42 of 77
Quote:
Originally Posted by stormwind13 View Post

I just thought 900 was a little steep for wood on a diy sub that's all. I'm definitely excited to come hear it when you are done.

If it were uncharted territory and i'm building a test sub there's no way. But, Ricci already built these, and I've used cheap plywood before and it was horrible to work with.
post #43 of 77
The GH design actually cuts MUCH better out of 4x8 sheets. If I remember correctly it cuts the wood to 5 18mm sheets and maybe 2 12mm sheets for 2 GH cabs. You can get both 45x45 sides out of one sheet with very little scrap some of which can be used for bracing, etc... And the top, bottom, and sides out of a second sheet. Originally the shop I was working with wanted 5x5 format. I've been to lazy to put together a cut sheet with 4x8.

Facepalm if I didn't mention that to you earlier Luke. Of course finding 4x8 sheet of BB can be tough sometimes and I don't have cut sheet done.
post #44 of 77
It takes 4.3 sheets of 8x4 18mm and 2 sheets of 12mm. So five sheets.
post #45 of 77
I was going to use either Birch or BB. You can't get BB in 4 x 8 sheets here that I've ever seen. The Birch we have is pretty nice as well and about 35% cheaper.
post #46 of 77
Quote:
Originally Posted by Ricci View Post

The GH design actually cuts MUCH better out of 4x8 sheets. If I remember correctly it cuts the wood to 5 18mm sheets and maybe 2 12mm sheets for 2 GH cabs. You can get both 45x45 sides out of one sheet with very little scrap some of which can be used for bracing, etc... And the top, bottom, and sides out of a second sheet. Originally the shop I was working with wanted 5x5 format. I've been to lazy to put together a cut sheet with 4x8.

Facepalm if I didn't mention that to you earlier Luke. Of course finding 4x8 sheet of BB can be tough sometimes and I don't have cut sheet done.

4x8 sheets of BB aren't available here. At least I haven't found any.

It took me a couple years to finally find a supplier for the 5x5 sheets I just found.
post #47 of 77
That's really strange. Most home stores typically carry 4x8 sheets of some form of high grade ply.
In fact, I have yet to find one around here that doesn't and I'm not exactly in a metropolis.
post #48 of 77
No BB here but I will be using Marine grade void free plywood on all my future builds.
post #49 of 77
Quote:
Originally Posted by chrapladm View Post

No BB here but I will be using Marine grade void free plywood on all my future builds.

That's pretty good stuff.
post #50 of 77
I get what I can. About $120 a sheet but worth it to me. The rest of the stuff here is not void free but costs 80 a sheet. Either way I have a few builds coming up now and Marine grade will work for me. Just waiting on woofers. biggrin.gif
post #51 of 77
Ouch! Man, that is some expensive ply!
Oh well, it's not like you are building them everyday.
post #52 of 77
No if I was I would end up having a garage like Ricci's or LilMike's. LOL

PLUS the wifey would not be happy. I already have a living room full of DIY speakers and she is sort of getting used to that. biggrin.gif

How far away from walls does a subwoofer outside need to be to get an accurate test?

Woofers wont be ready for about 2-3months for the UXL and I figure I will build a Micro in the meantime. SWS-15D4, UXL, BC 15TBX100 this is going to be a fun summer/winter.
post #53 of 77
I hear ya!

The micro thread is overdue! smile.gif

I am not sure on the how far.
post #54 of 77
Quote:
Originally Posted by chrapladm View Post


How far away from walls does a subwoofer outside need to be to get an accurate test?

I aim for more than 1/4 wavelength (at the lowest frequency reported) from any building/wall/obstructions.
post #55 of 77
Quote:
Originally Posted by jpmst3 View Post

I hear ya!

The micro thread is overdue! smile.gif

.....

Not even sure on how to reply to this....
post #56 of 77
Quote:
Originally Posted by lilmike View Post

Not even sure on how to reply to this....

We are dying to see and read about your latest creation! smile.gif
post #57 of 77
chrapladm,

Everyone here realizes that while incredible output can be had from a tapped horn, the compromise is all of these have to be highpassed, IIRC, right?

If you are looking for incredible output at the expense of size and bandwidth, these tapped horns are THE ticket, bar none. Nothing else will get you that much SPL/watt. But if you are in the MKTheater, notnyt, JapanDave camp of ULF, you need to stay away from horns.

I am not discouraging anyone here, as I love lilmike's, OKWolf's, and Ricci's designs (I was privileged enough to be present for the first test of the F20!), and I use front loaded horns in my HT and living room. But anyone who is thinking of building one has to know that if you are after the 9Hz peak when The Incredible Hulk uses halves of a police car as boxing gloves, the horns are not the right tool.


JSS
post #58 of 77
I never high pass my horns because I have factored in having enough headroom so I am using less than their limits at all freqs.
But, ya, horns are not the best for single digits...that is unless you have enough of them. wink.gif
post #59 of 77
Quote:
Originally Posted by jpmst3 View Post

I never high pass my horns because I have factored in having enough headroom so I am using less than their limits at all freqs.

Sage Advice. I do the same. I just want to make sure everyone else plans to do so as well.

JSS
post #60 of 77
Quote:
Originally Posted by maxmercy View Post

Sage Advice. I do the same. I just want to make sure everyone else plans to do so as well.
smile.gif
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