Otop Jarray build x 4

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Tom Smit
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Location: Sarnia, Ont. Canada

Re: Otop Jarray build x 4

#16 Post by Tom Smit »

Cool.
What is the brand name of the purple primer?
TomS

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Bill Fitzmaurice
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Re: Otop Jarray build x 4

#17 Post by Bill Fitzmaurice »

PVC cement primer may be clear or colored. The advantage to colored is you can see on PVC pipe where it's been applied, so you don't miss a spot. The same applies to the cement. Colored cement is usually orange.

himhimself
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Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#18 Post by himhimself »

CPVC plumbing has to have primer. I was told the purple allows home inspectors to visually verify plumbing connections were correctly assembled. Big box stores often sell little packs of primer and cement for pretty cheap. Everytime I've bought a larger cement, it always goes bad.
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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Tom Smit
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Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Otop Jarray build x 4

#19 Post by Tom Smit »

Thanks.
TomS

himhimself
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Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#20 Post by himhimself »

Got the basic boxes assembled this morning. My pin nailer made it pretty easy, although I still get pl all over myself. Next to trim the height of my baffles to fit, as I made them a little tall not knowing exactly how close the boxes would be to the plans. And I don't want to mess around adding little strips like I had to do with the sides.
Attachments
20190427_125556.jpg
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

ACUA
Posts: 552
Joined: Sun Sep 25, 2016 6:21 pm
Location: Tucson Arizona

Re: Otop Jarray build x 4

#21 Post by ACUA »

Dude you got pl on my phone man what the heck!
Advanced Concepts Underground Audio

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#22 Post by himhimself »

Sorry bro... here ya go
15564838961622588766169220384347.jpg
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#23 Post by himhimself »

:clap: Baffles and spacers glued up, got one mounted in the box. That'll be it for this weekend. Tubas ran for 6 hours last night without a hitch, just effortless bottom end
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#24 Post by himhimself »

A little more progress. Got the middle braces installed tonight. I'm happy with the way I left the full length of the triangle as it's made the sides super stiff. Same with the woofer spacer running the full width of the baffle Had to do a little torquing to get the boxes nice and square before gluing and pinning, but they seem pretty straight now. Hope to get a bit further this weekend since I'll be traveling a good chunk of this month.
15568434395377224057922085824933.jpg
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

ACUA
Posts: 552
Joined: Sun Sep 25, 2016 6:21 pm
Location: Tucson Arizona

Re: Otop Jarray build x 4

#25 Post by ACUA »

Wow so jelly man!
Advanced Concepts Underground Audio

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#26 Post by himhimself »

Made my rear side and top braces tonight. Hope to cut the bendy horn sheathes tomorrow and start gluing them in. Checked my stock of panel mount neutrik speak on jacks and don't have enough so ordered 8 of the round plate type from Amazon the otops. The panel ones will go on the next pair of tubas and a amp rack panel some day. Empty boxes right now weigh 11.5 lbs. Hoping to come in under 30 when complete.
Attachments
15569348432317671947185380425677.jpg
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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Chris_Allen
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Joined: Wed Jul 11, 2007 2:43 pm
Location: Huddersfield, UK

Re: Otop Jarray build x 4

#27 Post by Chris_Allen »

I can almost smell the cut plywood....
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#28 Post by himhimself »

A little more progress...
Attachments
1556988231982783607886737328802.jpg
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#29 Post by himhimself »

Only enough clamps to do one at a time. Just as well, as the sheaths seem to have a little gap to the braces after I got them all clamped down. Crud. I trust the PL will expand enough to take up the space. If not, I suppose I can put some PL from the backside after they cure. The other 6 sheaths are ratchet strapped around a log to get some pre-bend into them so they will lay down easier. I made some spacers to hold the narrow ends in place by the baffle rather than try to nail/clamp them. Seems to be working okay. The blue and red clamp combo is attempting to pull a slight bend out of the top panel.
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

himhimself
Posts: 599
Joined: Fri Nov 13, 2015 9:34 pm
Location: Vancouver BC & Bloomington IN

Re: Otop Jarray build x 4

#30 Post by himhimself »

You also may notice I didn't cut the handle ports or drill the holes for the tee-nuts. Not an oversight. I was concerned that if the cabinets came out a little wonky, they wouldn't look right when clamped into an array. Once all the sheaths are on and trimmed, I have a template I can place on the side and get the 4 holes all in exact same spot. Actually probably was an unnecessary adventure as the cabinets seem to be more square than my skills warranted - Yay!
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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