Otop 12 Build: 1 Pair

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commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Otop 12 Build: 1 Pair

#1 Post by commander_dan »

Day 1:

So upon finishing our T30 project, we started the first of probably 2 pairs of Otop 12's. These will be 3012HO loaded, and the first pair will have the melded piezo array. Wood and top hats purchased, we got the bottom and top panels cut and marked up, as well as the baffles and horn panel braces. We got them assembled and that's as far as we got. Drivers should be ordered in the next couple of weeks so until they arrive, we wont be going much past horn panels and throat reflectors. I plan on going with Leland's pre assembled tweeter arrays which should save some time.
Attachments
Baffles marked up
Baffles marked up
Jigsaw
Jigsaw
Free handed baffles
Free handed baffles
Baffles complete
Baffles complete
Horn panel braces
Horn panel braces
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#2 Post by commander_dan »

Day 1 continued..
Attachments
Baffles installing
Baffles installing
Baffles installed
Baffles installed
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#3 Post by commander_dan »

Day 2:

Just an afternoon spent on horn panels and starting to cut throat reflectors so not much progress..
Attachments
20150620_154806.jpg
20150620_154759.jpg
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

User avatar
Chris_Allen
Posts: 3355
Joined: Wed Jul 11, 2007 2:43 pm
Location: Huddersfield, UK

Re: Otop 12 Build: 1 Pair

#4 Post by Chris_Allen »

Damn - you're really good with a jigsaw.
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

NukePooch
Posts: 371
Joined: Mon Jun 30, 2014 8:07 pm
Location: Berea, Kentucky

Re: Otop 12 Build: 1 Pair

#5 Post by NukePooch »

Chris_Allen wrote:Damn - you're really good with a jigsaw.
+1
...those cut lines sure look a whole lot less 'wavy' than what I do...Awesome!
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#6 Post by commander_dan »

Thanks fellas. 6 T30's were a good warmup for the Otop baffles it seems :P
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#7 Post by commander_dan »

Day 3:

Today I cut the throat reflectors and drilled the holes using the 45' jig. Made life really easy! I then attached the tops to the cabs, taking the time to make sure everything was square. I think I managed to get it within an acceptable tolerance. I prioritized the squareness of the horn panels as I felt they were more important to get right than the outer cab squareness. We'll see how it goes when the sides and back go on I guess :)
Attachments
Lining the 45' jig up
Lining the 45' jig up
45' jig ready
45' jig ready
45' hole..
45' hole..
Top panels installed
Top panels installed
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#8 Post by commander_dan »

Day 3 continued:

After the top panels went on, I dry fitted the throat reflectors to make sure the top hat holes lined up ok and made the necessary adjustments with a file. Went ahead and installed the reflectors. Initially I tried securing them with a brick but they kept drifting, so I ended up brad nailing them into place, much better result! Fitted the top hats here as well, I just PL'd the mating edge between the bottom panel and the top hat, and left the throat reflector flush. I will seal up where the top hat protrudes through the reflectors later (do I even need to bother since the 'hats are PL'd in from the bottom?). I ran out of daylight pretty quick so cleaned up the excess PL around the place and called it a day.
Attachments
20150703_164759.jpg
20150703_181440.jpg
20150703_184447.jpg
Reflectors/top hats installed
Reflectors/top hats installed
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#9 Post by commander_dan »

Question:

It says to use a certain size holesaw bit to cut the tuning ports/handle holds in the sides of the cab. The closest bits I have to that are 1/16" larger, or 3/16" smaller.

Will going slightly larger or slightly more smaller be very detrimental to the cabs tuning?

Should I use the smaller bit and make the handles 6/16" longer?

If I can get away with it that'd be convenient, but if not I will go and buy the right size bit, they're about 20 bucks.

Thanks :)
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#10 Post by commander_dan »

Scratch that. Just found out my dad has ordered a full set which should arrive next week. I can wait.

Cheers.
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#11 Post by commander_dan »

Day 4:

Today I trimmed the horn panels flush, cut the cabinet sides, back panels, woofer spacers and phase plug extensions. I decided to round over the edge of the woofer spacers where the woofer surround could potentially meet, something I saw someone else recently do (Bruce maybe?) and thought it was a good idea. Thank goodness I had access to a decent router! Makes life easy for all kinds of things. I got the spacers marked up and drilled, got 'em installed as well as the plug extensions. Just need to sand a couple back a little where they slightly mis-aligned. In all, a very productive and fun day :)
Attachments
Trimming horn panels
Trimming horn panels
Horn panels flush
Horn panels flush
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#12 Post by commander_dan »

Day 4 continued..
Attachments
Sides and backs
Sides and backs
Routing..
Routing..
20150705_105826.jpg
Woofer spacers
Woofer spacers
Old T30 baffle cutouts make for good plug extensions!
Old T30 baffle cutouts make for good plug extensions!
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#13 Post by commander_dan »

Day 4 Continued..
Attachments
Nice round over
Nice round over
Drilling spacers
Drilling spacers
Spacers installed
Spacers installed
First extensions..
First extensions..
Extensions done
Extensions done
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#14 Post by commander_dan »

Day 5:

Did some work on the side panels today. Cut the tuning ports and rounded 'em over, installed half round moulding, and spent a little while on an idea I had to prevent unwanted visitors from making the inside of the OT12 their home, via the open ports. This mod also doubles to reduce visibility into the cabs insides from the outside. I got some light metal flyscreen from the local bunnings, and then measured and cut a template out of cardboard. I then cut the flyscreen into the desired shape, and folded it with a metal ruler. I used hot melt glue to seal the joints in the mesh to complete the "handle port mesh lining". I then tacked them into place on the side panels, and bogged up the contacting tabs with hot melt glue to seal/strengthen/prevent possible vibration. The result was pretty good.
Attachments
20150715_123139.jpg
20150715_123147.jpg
20150715_124513.jpg
20150715_140533.jpg
20150715_151810.jpg
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Otop 12 Build: 1 Pair

#15 Post by commander_dan »

Day 5 continued..

Once the side panels were ready, I spray painted the insides of the horn panels flat black, and then installed the sides. Also smeared some PL into where the top hats protrude from the reflectors. Cab 1 was just slightly out of square, and cab 2 was near perfect, so I'm pretty happy. Called it a day once that was done. Next up, flanges for the access panels, then probably exterior work while I wait for the remaining components to arrive :)
Attachments
20150715_153829.jpg
20150715_161123.jpg
20150715_173157.jpg
20150715_172501.jpg
20150715_174428.jpg
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

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