Jack build European material

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Bill Fitzmaurice
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Re: Jack build European material

#16 Post by Bill Fitzmaurice » Sat Sep 25, 2021 3:43 pm

Jean Mi wrote:
Sat Sep 25, 2021 2:19 pm
1 no tweeter, 1 low tweeter (4 ohm resistance in serial on the high pass filter input), 1 full tweeter (direct input on the high pass filter
If you're saying what I think you're saying don't do that. There is a 4 ohm resistor in the high pass filter. Another 4 ohm resistor in series with it will have no effect.

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Seth
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Re: Jack build European material

#17 Post by Seth » Sat Sep 25, 2021 9:32 pm

Jean Mi wrote:
Sat Sep 25, 2021 2:19 pm
Hey Guys

I am close to finish (I take my time) I finaly order the Caps

Find some pictures of the work

I machine the rear panel to add the speakon connectors plate

Image

Some electrical circuit test (I build it with a 3 way switch : 1 no tweeter, 1 low tweeter (4 ohm resistance in serial on the high pass filter input), 1 full tweeter (direct input on the high pass filter)
I use mastic (sifka 1FC to seal the speakons)
Image

Focus on the circuit (low pass and high pass)
21092509042626040617587407.jpg
Final rear panel with insulation
21092509042826040617587408.jpg

I also glue washers to avoid to stamp to seal screwing the panel on the main case
21092509052926040617587410.jpg
Picture of the main case with insulation (you can see the connector to connect the circuit to the tweeters)
21092509042926040617587409.jpg
Then I do the leak test and the burn in test (30h 30hz)
21092509053626040617587415.jpg
My jack almost finished (I just to add the final wood sheet, I have to do it again cause first time I have a problem with the glue and the wood sheet cause the wood sheet makes waves when glue was dry, so I bought other one directly with adesive on the rear..)
21092509053826040617587416.jpg
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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