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Box build log: 12" Fi Audio Q

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Old Mar 11, 2008 | 06:14 PM
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Box build log: 12" Fi Audio Q

Figured I'll let it have its own thread instead of putting it in the big Audio Thread.

The design:



started construction on the box. it's going to be a little smaller than initially planned at 2.1 cu ft. it's really my first enclosure with kerf'ed panels. i reallllllly need to get some big clamps. that would have made things MUCH easier.




yes i'm using screws just to mess with Don


no clamps, so i had to ghetto rig it somehow. it works.
Old Mar 11, 2008 | 06:14 PM
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a tiny crack started to form. i put some glue on it. seems to help it from spreading.


starting to kerf the other port piece...


waiting to get bent into shape.
Old Mar 11, 2008 | 06:17 PM
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worked on the box a bit more today while there was still some light out.




pick up a clamp at home depot. works rather nice.


in the process of filling in the gaps with a paste of wood glue and MDF dust.
Old Mar 11, 2008 | 06:19 PM
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And here's the sub. Looks pretty nice. Only complaint is the CA glue was running over the edge of the spider landing, but it's no biggie.








flat leads that goes under the spider.


the *** shot.
Old Mar 11, 2008 | 06:36 PM
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The new leads are very nice. Box looks good to man!
Old Mar 11, 2008 | 08:27 PM
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thanks chris
Old Mar 11, 2008 | 09:48 PM
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looks beefy
Old Mar 12, 2008 | 12:27 AM
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In my limited experience...

THat is a fantastic looking slot port enclosure.

Super Props on the smooth port entrance.
Old Mar 12, 2008 | 12:43 AM
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I approve the level of fine carpentership.
Old Mar 12, 2008 | 06:01 AM
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That's a really nice build. I haven't seen a box of this quality in a long time. The kerfs came out especially good. Nice work!
Old Mar 12, 2008 | 06:43 AM
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how much does all that weigh
has to be about 50 plus pounds right
Old Mar 12, 2008 | 07:44 AM
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it's pretty heavy right now. i still need to put the top panel in, as well as some bracing. it would be much lighter if i used birch, but eh....i had quite a bit of MDF laying around. it'll be even more heavy with the sub installed. the sub alone is ~30 pounds.

thanks for the props fellas.
Old Mar 12, 2008 | 08:03 AM
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Very nice build!
Old Mar 12, 2008 | 08:09 AM
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Originally Posted by AscendantMax
it's pretty heavy right now. i still need to put the top panel in, as well as some bracing. it would be much lighter if i used birch, but eh....i had quite a bit of MDF laying around. it'll be even more heavy with the sub installed. the sub alone is ~30 pounds.

thanks for the props fellas.
when you rolling a super sub like that birch is a BAD idea
MDF is the only way unless you are into fiberglassing
Which is always the best solution but who has the time and money right?
Old Mar 12, 2008 | 08:25 AM
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how is birch a bad idea? i've used birch in a lot of builds. it's much lighter and a bit stronger than MDF.

MDF is favorable since it's fairly cheap. birch is roughly twice the cost of a sheet of 4'x8' MDF.
Old Mar 12, 2008 | 08:39 AM
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Originally Posted by AscendantMax
how is birch a bad idea? i've used birch in a lot of builds. it's much lighter and a bit stronger than MDF.

MDF is favorable since it's fairly cheap. birch is roughly twice the cost of a sheet of 4'x8' MDF.
ive hit around 140 db @ 40hz with 600 watts + a 15" Super sub in a birch box that was made like crap (made by me), and it sounded amazing.
Old Mar 12, 2008 | 08:48 AM
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looks good bro. just had to port huh?
Old Mar 12, 2008 | 09:07 AM
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looks good man
Old Mar 12, 2008 | 10:43 AM
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Originally Posted by AscendantMax
how is birch a bad idea? i've used birch in a lot of builds. it's much lighter and a bit stronger than MDF.

MDF is favorable since it's fairly cheap. birch is roughly twice the cost of a sheet of 4'x8' MDF.
Thats a little missleading, birch is only stronger if its void free...

The stuff you find at home depot and such is usually NOT void free, and only 7-9 ply Vs. 13 ply for the good stuff...

Usually void free 13 ply birch ranges from 50-100 dollars for a 5 x 5 sheet...depending on location. Here in California I have seen prices hover around 70 bucks...
Old Mar 12, 2008 | 10:49 AM
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And you won't gain any extra db's from a birch box vs a mdf box.
Old Mar 12, 2008 | 11:55 AM
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last time i used burc h i spilt the front where the sub attaches
I dont trust it
i prefer MDF double layered even
Old Mar 12, 2008 | 12:20 PM
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Haha just because YOU cracked it doesn't make it inferior. MDF splits all the time.
Old Mar 12, 2008 | 12:31 PM
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Originally Posted by amomaxima
last time i used burc h i spilt the front where the sub attaches
I dont trust it
i prefer MDF double layered even
Did you pre drill? Like noted below MDF will do the same thing...

You may have hit a knot (void) in the ply causing it to split...this is why I can't stress enough...if you are going to use birch for a subwoofer enclosure then do it right the first time and invest in quality wood...

Regular veneered birch is fine for low output enclosures for light duty or home projects...but thats it...

Originally Posted by nismos14
Haha just because YOU cracked it doesn't make it inferior. MDF splits all the time.
Old Mar 12, 2008 | 12:35 PM
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http://www.youtube.com/watch?v=z8iRrsquzT8
what about cardboard?
Old Mar 12, 2008 | 12:46 PM
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Press board is even bettar!


Old Mar 12, 2008 | 12:49 PM
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Originally Posted by slickrick
LOL!!!
Old Mar 12, 2008 | 02:10 PM
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Originally Posted by slickrick
I see they found a good use for those JLzorz...
Old Mar 12, 2008 | 02:55 PM
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Whats with the ****ty pics?
Old Mar 12, 2008 | 04:55 PM
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looks good. I may try kerfing on my next box..

whats the dead space for? couldn't have come up with some use for it?
Old Mar 12, 2008 | 05:05 PM
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Originally Posted by mendon99
looks good. I may try kerfing on my next box..

whats the dead space for? couldn't have come up with some use for it?
Assuming for the outer flare, much easier to have dead space then to try to trace out the kerf for the upper and lower panels...

As far as use for it, what did you have in mind, a cup holder
Old Mar 12, 2008 | 05:58 PM
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Originally Posted by Fast1one
Thats a little missleading, birch is only stronger if its void free...

The stuff you find at home depot and such is usually NOT void free, and only 7-9 ply Vs. 13 ply for the good stuff...

Usually void free 13 ply birch ranges from 50-100 dollars for a 5 x 5 sheet...depending on location. Here in California I have seen prices hover around 70 bucks...
the home depot near my area have some 13 ply birch. you're right on the voids though. i've seen some home depot locations carry some birch that are knotted all over. i try to go through each board to find one that's actually worth the price.
Old Mar 12, 2008 | 06:01 PM
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as for the dead space, i wanted to flare both sides. and yep it's much easier than tracing out the kerf on the top and bottom pieces.

my old man took the camera again, so i snapped some pics with my phone again. got the top panel in. first layer of fleckstone is drying. i couldn't flush the sub. i didn't know the OD of the sub is 12.5"...the front panel is 12.5" tall not counting the top and bottom panel.
Old Mar 12, 2008 | 07:42 PM
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getting ready to drill the cutout




painted the port black.
Old Mar 12, 2008 | 07:43 PM
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the fleckstone looks pretty damn good. i'll snap better pics tomorrow. still need to carpet the top, sides, and back. then terminal cup. then bassssssssssssss
Old Mar 12, 2008 | 07:55 PM
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Originally Posted by AscendantMax
the home depot near my area have some 13 ply birch. you're right on the voids though. i've seen some home depot locations carry some birch that are knotted all over. i try to go through each board to find one that's actually worth the price.
wow, void free or not 13 ply at home depot is pretty cool...

Great looking box BTW...
Old Mar 12, 2008 | 07:55 PM
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Noice noice.
Old Mar 13, 2008 | 05:43 PM
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update: took some better pics today of the fleckstone. got the sub in, and had a quick listen. the thing is a low end monster! there's zero port noise thanks to the flared opening, and the sub is pretty musical. response wise, it's a little warmer than the hertz, but it's keeping up with any music i throw at it. i'll need more ear time to give a better review.






closer shot of the fleckstone.


waiting to get wired and screwed in.
Old Mar 13, 2008 | 05:48 PM
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threw it in the backseat for a quick listen.
Old Mar 13, 2008 | 08:25 PM
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Nice job! Wait till that sucker opens up. You will notice a huge difference. If you think it is warm now, just wait.

I am loving the fleck man. It sets the sub and port off very well.
Old Mar 13, 2008 | 08:50 PM
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Looks nice. What is the box ported to?

I'm gonna start building one aswell next week, think I'll just use manufacturer recommended dimentions.



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