2 Jack 112s - 3012HO with melded array

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shane2943
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Joined: Fri Jun 18, 2010 10:32 am

2 Jack 112s - 3012HO with melded array

#1 Post by shane2943 »

Started the build on a pair of Jack 112s with the 3012HO and melded piezo array. These will be for general use, but will spend most of their time in the small ballrooms of the event space featured in my T39 build thread. I went with the Jacks because they seemed the best fit for sub-less small PA with high efficiency. One of the "gigs" that these will be in is sitting on the bed cover of my pickup in a local parade in June. Not looking for main stage volume, but definitely want the music to be heard as we go by and I don't think the Jacks will have any issue delivering on that.

On to the first baby step pitchers... :hyper:
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Bruce Weldy
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Location: New Braunfels, TX

Re: 2 Jack 112s - 3012HO with melded array

#2 Post by Bruce Weldy »

Looks like a good start.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210

"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#3 Post by shane2943 »

Progress
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Seth
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Re: 2 Jack 112s - 3012HO with melded array

#4 Post by Seth »

Way to go Shane. Looking good 👍
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#5 Post by shane2943 »

I love seeing that horn mouth!

And the saying is true, you can NEVER have enough clamps
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#6 Post by shane2943 »

Movin' right along
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Keryn O'Shea
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Location: Brisbane, Australia

Re: 2 Jack 112s - 3012HO with melded array

#7 Post by Keryn O'Shea »

shane2943 wrote: ↑Sun May 11, 2025 4:44 pm ...you can NEVER have enough clamps
You have an impressive array alright!
Good to see another has the build bug, great work there mate :)
AT8 14", AT10 19", T30 28" LAB12, T48 36" 3015LF, THT 20" LAB15, SLA 4x3"/4x4", CArray 6x4", TLAH, TLAP, J10 FA, J12 FA, OT8 CD, OT12 FA, OT15 CD, SLAP 2x6"/4x6", WH8, DR280 MA, XF210. Next J10L
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#8 Post by shane2943 »

Keryn O'Shea wrote: ↑Mon May 12, 2025 11:59 pm You have an impressive array alright!
Good to see another has the build bug, great work there mate :)
Thank you sir. The screw bar clamps at Harbor Freight are actually pretty good and are a steal.

MOAR PITCHERS

Sides, throat reflectors, phase plugs, and driver spacers installed. Plus, tweeter madness!
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#9 Post by shane2943 »

Starting to get excited!
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#10 Post by shane2943 »

Mental note: when cutting the piezos on the table saw, WEAR EYE PROTECTION (I mean, wear it all the time anyway, but especially when cutting those). Sometimes the blade likes to spin out and then hurdle the screws at you at 5000 miles an hour. :shock: :shock: :shock: :shock:
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Tom Smit
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Re: 2 Jack 112s - 3012HO with melded array

#11 Post by Tom Smit »

Oooo, something tells me that you found out the hard way.
TomS
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shane2943
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Re: 2 Jack 112s - 3012HO with melded array

#12 Post by shane2943 »

Tom Smit wrote: ↑Thu May 15, 2025 11:45 pm Oooo, something tells me that you found out the hard way.
Let's just say I'm real glad I had those safety glasses on :shock: :noob:
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shane2943
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Joined: Fri Jun 18, 2010 10:32 am

Re: 2 Jack 112s - 3012HO with melded array

#13 Post by shane2943 »

First time ever making a melded array. I was quite intimidated by this part and felt anxious about but they turned out pretty good!
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himhimself
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Re: 2 Jack 112s - 3012HO with melded array

#14 Post by himhimself »

Looking good!
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight)
Truck Tuba (MCM)
Next up: 2xJack12L or family of table tubas
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Tom Smit
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Re: 2 Jack 112s - 3012HO with melded array

#15 Post by Tom Smit »

Good job on that melded array!
TomS
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