First mini-fab project: ammo case speaker boxes! - Jeep Wrangler Forum

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Old 03-27-2013, 10:20 PM   #1
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First mini-fab project: ammo case speaker boxes!

Well, I decided I needed something better than just the little 4x6 dash speakers, and I didn't want to go with the standard pre-fab 6x9 wedge boxes, so in looking around the 'net, I came across this idea, and did my own take on it.

Other designs front-mounted the speakers, but I found the included grilles with these were nearly an inch wider than the height of the boxes (unless I wanted to spend twice as much for 40mm boxes)... the speakers themselves fit, though, so I decided to figure out a way to back-mount them.

Start with two 50 cal. ammo boxes and 6x9s of choice (these are a crappy $30 pair from Princess Auto, until I get something better):


Holes drilled for mounting speakers, cutout traced from grilles bundled with speakers:




Drill corners of cutout:


Then... cut it out! Don't forget to clean the edges up with a sanding drum or what-have-you:


Drill hole for Speakon panel connector (7/8") and mount (connector is mounted with small flat-head bolts):






Mount standoffs to speaker:


Add stick-on foam:




Finally, bolt speaker to the can (foam will compress):




The finished product:


Fits right in!


When I put better speakers in, I'll use a pair that come with spacer rings, instead of the stand-offs and foam.

Not shown here: I had to put a fair bit of dampening material inside the cans to kill the rattling (I used bubble wrap; proper poly-fill would be better). The connections are just with basic 16/2 speaker wire for now, but I want to switch it to proper instrument cable, possibly even "curly" guitar cords. Thinking of putting Speakon connectors in the back of the console so the cables can be unplugged and removed completely as well.

Speakons are a pro-audio connector mostly used for concert speaker rigs; they twist-lock in so they won't fall out, and they're built to take a beating. They come in two- and four-pole versions; I stocked up on the four-pole types as I want to use them for my door connections as well... plus the four-pole are actually a bit cheaper than the two-pole.

For what it is, it sounds pretty darn good. Definitely an improvement on the dinky 4x6" dash speakers.

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Old 03-28-2013, 07:38 AM   #2
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Is it just me? I can't see any of the pictures but would love to see the final product

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Old 03-28-2013, 08:38 AM   #3
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Same. Getting an odd "do not enter" sign looking symbol instead of pics.
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Old 03-28-2013, 08:49 AM   #4
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Sorry, my bad, the web album broke... fixing it now.
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Old 03-28-2013, 08:59 AM   #5
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Quote:
Originally Posted by Soundy View Post
Sorry, my bad, the web album broke... fixing it now.
No worries
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Old 03-28-2013, 09:19 AM   #6
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Awww WAT, it won't let me edit the original post anymore :P

Okay, here it is again, links fixed:

------------------------------------------------------------------------------------

Well, I decided I needed something better than just the little 4x6 dash speakers, and I didn't want to go with the standard pre-fab 6x9 wedge boxes, so in looking around the 'net, I came across this idea, and did my own take on it.

Other designs front-mounted the speakers, but I found the included grilles with these were nearly an inch wider than the height of the boxes (unless I wanted to spend twice as much for 40mm boxes)... the speakers themselves fit, though, so I decided to figure out a way to back-mount them.

And here it is: the speaker box fabrication post.

Start with two 50 cal. ammo boxes and 6x9s of choice (these are a crappy $30 pair from Princess Auto, until I get something better):


Holes drilled for mounting speakers, cutout traced from grilles bundled with speakers:




Drill corners of cutout:


Then... cut it out!


Drill hole for Speakon panel connector (7/8") and mount (connector is mounted with small flat-head bolts):






Mount standoffs to speaker:


Add stick-on foam:




Finally, bolt speaker to the can (foam will compress):




The finished product:


Fits right in!


When I put better speakers in, I'll use a pair that come with spacer rings, instead of the stand-offs and foam.

Not shown here: I had to put a fair bit of dampening material inside the cans to kill the rattling (I used bubble wrap; proper poly-fill would be better). The connections are just with basic 16/2 speaker wire for now, but I want to switch it to proper instrument cable, possibly even "curly" guitar cords. Thinking of putting Speakon connectors in the back of the console so the cables can be unplugged and removed completely as well.

Speakons are a pro-audio connector mostly used for concert speaker rigs; they twist-lock in so they won't fall out, and they're built to take a beating. They come in two- and four-pole versions; I stocked up on the four-pole types as I want to use them for my door connections as well... plus the four-pole are actually a bit cheaper than the two-pole.

For what it is, it sounds pretty darn good. Definitely an improvement on the dinky 4x6" dash speakers.
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Old 03-28-2013, 09:57 AM   #7
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Cool. I knew someone long ago who did pretty much the same thing using the larger 20mm cans, had them mounted to the gate.
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Old 03-28-2013, 09:59 AM   #8
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I'm thinking of attaching some magnets to the bottom so I can stick them to the body wherever is suitable... like on the hood (above), or the sides, etc.
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Old 03-28-2013, 10:02 AM   #9
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I have a special plan for a sub box, but I'll save that for a surprise
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Old 03-28-2013, 10:49 AM   #10
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Would magnets on the ammo box distort the speakers at all since they too have a magnetic ring on them? Not to electronics savvy in this regard and was just wondering
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Old 03-28-2013, 09:20 PM   #11
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Nope - the magnet on a speaker has a pole piece that concentrates its magentism inward - a magnet directly on the outside of it would have little or no effect, and one outside a metal can surrounding the speaker wouldn't have any effect at all.

HowStuffWorks "How Speakers Work"
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Old 03-29-2013, 08:16 AM   #12
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Ah, good stuff and thanks for that link. Pretty bad arse project you have going

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