Jack112 Light - Awesome

The Jack of All Trades pro-sound cabs.
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Dwiggins
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Joined: Fri Oct 18, 2019 11:50 am

Jack112 Light - Awesome

#1 Post by Dwiggins » Tue Nov 12, 2019 10:20 am

Hi
Jack 112 Light

Just wanted to commend Bill on a fantastic sounding cabinet design.

I finished my cabinet and it is awesome. It only weighed 16 lbs empty , completed it weighs in around 26 lbs with crossovers and a 3012HO. As for sound, it ROCKS. I have not used in a live setting yet ,but compared it with my Fearful 12/6 , which weighs 46 lbs and a GK 115MB combo, which weighs 36 lbs.
Like most reviews state ,it is a full frequency cabinet so my other stuff almost seems like there is a hole in the midrange after comparing them to Bills design. It does require some adjusting the EQ to get what you want , but it is there.
I have noticed a slight lower volume output below A on the E string which is normal on most cabinets.

The only problem so far is the Piezo array vibrates like crazy when I play a D on the A string. I need t fix that ? I have 6 Piezos in a flat array. Anyone have that issue? I am sure there is a easy fix.

Thanks Danny. I will post some pictures later.

Grant Bunter
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Re: Jack112 Light - Awesome

#2 Post by Grant Bunter » Tue Nov 12, 2019 4:27 pm

Dwiggins wrote:
Tue Nov 12, 2019 10:20 am
The only problem so far is the Piezo array vibrates like crazy when I play a D on the A string. I need t fix that ? I have 6 Piezos in a flat array. Anyone have that issue? I am sure there is a easy fix.
Did you put something like gasket tape under the array?
If not, do that.

Did you only put a screw in each corner?
If yes, also put a screw at each pizo joint down each side.
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

Dwiggins
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Joined: Fri Oct 18, 2019 11:50 am

Re: Jack112 Light - Awesome

#3 Post by Dwiggins » Tue Nov 12, 2019 10:38 pm

Hi thanks for the reply.
I have 4 screws in each Piezo however I did not glue the Piezos together. The Piezos were buzzing a little until tightened them up , but the whole assembly vibrates. The two 1”x1/2” plywood strips along with the 6 Piezos vibrates in and out rapidly approximately 1/4” when I play a D on my bass. That is with a fairly loud volume setting. I think I will try to brace or reinforce the array from the back somehow.

I would like to post photos but don’t know how to do that.

Thanks again Danny

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Bill Fitzmaurice
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Re: Jack112 Light - Awesome

#4 Post by Bill Fitzmaurice » Tue Nov 12, 2019 10:49 pm

Dwiggins wrote:
Tue Nov 12, 2019 10:38 pm
I did not glue the Piezos together.
That's probably the source of the flexing.

Dwiggins
Posts: 10
Joined: Fri Oct 18, 2019 11:50 am

Re: Jack112 Light - Awesome

#5 Post by Dwiggins » Tue Nov 12, 2019 10:59 pm

BA6F709E-DD68-458A-88FF-30B858849E7F.jpeg
Dwiggins wrote:
Tue Nov 12, 2019 10:38 pm
Hi thanks for the reply.
I have 4 screws in each Piezo however I did not glue the Piezos together. The Piezos were buzzing a little until tightened them up , but the whole assembly vibrates. The two 1”x1/2” plywood strips along with the 6 Piezos vibrates in and out rapidly approximately 1/4” when I play a D on my bass. That is with a fairly loud volume setting. I think I will try to brace or reinforce the array from the back somehow.

I would like to post photos but don’t know how to do that.

Thanks again Danny
BA6F709E-DD68-458A-88FF-30B858849E7F.jpeg
1A1CBC8D-EA90-40BF-979C-A46547F21F40.jpeg
77249B88-D3F5-4EFE-A7D7-5EDC1CFB4CE7.jpeg
8BFE0C76-F5E6-4DB5-B981-E0C84A2E8647.jpeg

Dwiggins
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Re: Jack112 Light - Awesome

#6 Post by Dwiggins » Tue Nov 12, 2019 11:38 pm

I did deviate from the plans by adding a 1”x1/2” plywood strip to the front top and bottom edge of the cabinet. The 1/4” plywood top and bottom was a little bowed so I wanted to reinforce it. Maybe that is why I have this flexing issue?.

Also the braces on the inside I used a triangle shape with holes drilled in them as It was easier to keep them square during assembly. And I did not use staples or brads. I clamped and duct taped everything as I wanted a natural finish without nail holes. I pre-bent the sheaths by wetting them and clamping in a bent position overnight.

Overall I am very pleased and impressed with Bill’s Design ! The Jack112 light is a light weight ,sturdy, high performance cabinet that sounds Killer. Oh and it looks really cool too.

You can’t buy a cabinet with this performance that weighs 26 lbs !!

Thanks : Danny Wiggins

SethRocksYou
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Re: Jack112 Light - Awesome

#7 Post by SethRocksYou » Wed Nov 13, 2019 12:02 am

Dang Danny. That looks really good. :thumbsup:
Two 2x6 shorty SLA Pro's
One 16" T39, 3012LF loaded
20" Tall AutoTuba loaded with 2 8" MCM 55-2421
8½" TruckTuba loaded with 2 8" MCM 55-2421

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Tom Smit
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Re: Jack112 Light - Awesome

#8 Post by Tom Smit » Wed Nov 13, 2019 12:23 am

Looks pretty good!
By the way, in regards to the photo with the amp on top, the cab is on it's side.
TomS

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Bill Fitzmaurice
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Re: Jack112 Light - Awesome

#9 Post by Bill Fitzmaurice » Wed Nov 13, 2019 8:05 am

+1, you don't want it placed that way. If the tweeters aren't vertical you're killing the high frequency dispersion.

Dwiggins
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Re: Jack112 Light - Awesome

#10 Post by Dwiggins » Wed Nov 13, 2019 8:45 am

Ok
It fit in that space on its side. I will us turn it right side up from now on.

I will glue the Piezos together and try it .and let you guys know how that works

Thanks for the help. Danny

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Bill Fitzmaurice
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Re: Jack112 Light - Awesome

#11 Post by Bill Fitzmaurice » Wed Nov 13, 2019 10:47 am

It would be best to cut the frames down while you're at it, using the instruction for the eight tweeter array. It's pretty obvious from your pics that you're totally capable of doing it the best way, as opposed to the easiest way. Nice work.

Dwiggins
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Joined: Fri Oct 18, 2019 11:50 am

Re: Jack112 Light - Awesome

#12 Post by Dwiggins » Thu Nov 14, 2019 1:47 am

Thanks Guys
I will take your advice Bill and build the 8 array from the plans.
Oh I am using this Cabinet for a Bar Gig Saturday. I will let you guys know how it turns out.

Danny

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Bill Fitzmaurice
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Re: Jack112 Light - Awesome

#13 Post by Bill Fitzmaurice » Thu Nov 14, 2019 7:45 am

You don't need to go to eight tweeters, though the option is there. My point is that even with six they'll work better if the frames are trimmed to make a more compact array.

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