2x6 SLA Pro Build

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Seth
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Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: 2x6 SLA Pro Build

#16 Post by Seth »

While they were off due to my mistake yesterday, I used the back-to-main brace brace to set my main brace jig depth, instead of measuring. Worked out well.
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Figured I'd set the baffle stop jig while I was at it. I've been using a 20 gauge pin nailer with 1" pins to atach the jigs. Works really well and they're even easier to remove than standard 16g brads.
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Main brace, back brace, and baffle installed. Measuring, cutting, and gluing the damping material in as I go.
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Went ahead and slid the main-to-baffle brace in place. Was able to shoot a couple brads in from behind at an angle, through the main brace to hold the front brace in place. But decided to keep on trucking anyway and put the other sides on instead of waiting for the PL to cure.
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Sides are on. One top secured in place, getting ready for the next.
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Last edited by Seth on Mon Apr 06, 2020 2:33 am, edited 4 times in total.
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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Seth
Posts: 2731
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: 2x6 SLA Pro Build

#17 Post by Seth »

Both tops on. Starting to come together. Still have to put the bottoms on.
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All assembled.
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Figured some of you might want to put a face to the name (I know I'd like to for you guys)
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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

Grey Owl
Posts: 218
Joined: Fri Mar 20, 2009 10:38 pm
Location: New Zealand, User 1603

Re: 2x6 SLA Pro Build

#18 Post by Grey Owl »

My God Seth, will you slow down! :conf:
I spent hours trying to figure out the safe way to cut a 27o negative angle on my OTB front panel without losing fingers or thumbs :fingers: (also, I got it completely wrong) and here you go, doing nearly a complete cabinet in the same time......
Ha ha :shock:
Grey Owl
You have two ears and one mouth. Use them in the same ratio!!

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: 2x6 SLA Pro Build

#19 Post by jimbo7 »

Is it snowing in Sacramento? :lol:
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

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Seth
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Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: 2x6 SLA Pro Build

#20 Post by Seth »

jimbo7 wrote: Mon Apr 06, 2020 6:25 pm Is it snowing in Sacramento? :lol:
Hahaha. No, but was a little cool and rained cat's n dogs that day... and I have no hair to keep the heat from escaping my noggin.
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

User avatar
Seth
Posts: 2731
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
Contact:

Re: 2x6 SLA Pro Build

#21 Post by Seth »

Jimbo was having some issues with his 3D printer. Went ahead and put these together instead. Not the most attractive thing I've ever made, but I like it.
20200407_181114.jpg
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Put some coats on.
20200407_182616.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

User avatar
Seth
Posts: 2731
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
Contact:

Re: 2x6 SLA Pro Build

#22 Post by Seth »

When I cut the legs for the crossover I didn't account for the depth added by the zip ties, so I propped it up and glued it to some scrap ply then hot melt glued it where I wanted it.
It fit nicely in the rear of the cabinet, centered right under the SpeakOn jacks. Looks like I can add some damping material on the left, which I initially left uncovered to mount the crossover there.
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I thought it might be a good idea to mark the positives and negatives now, so that if I ever have to open them up in the future I won't have to figure it all out again. Did the same with the Alpha 6 wiring. Also, I did not solder these. I'm a big fan of crimping when it's sufficient. And it's completely sufficient here. IMO
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Here's one all buttoned up, looking good, and sounding pretty darn nice. Will finish the other one up tomorrow and give the pair a listen.
20200409_164034.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

Grant Bunter
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Location: Ilfracombe Queensland Australia
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Re: 2x6 SLA Pro Build

#23 Post by Grant Bunter »

:hyper:

Looking great!
Is there an option for 3 piezo's/cab in the 2 x 6?
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: 2x6 SLA Pro Build

#24 Post by jimbo7 »

No. Just 2x2, 4x4, 6x4
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

Grant Bunter
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Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: 2x6 SLA Pro Build

#25 Post by Grant Bunter »

jimbo7 wrote: Thu Apr 09, 2020 10:24 pm No. Just 2x2, 4x4, 6x4
Oh! My older plans have a 6 piezo option...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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Seth
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Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: 2x6 SLA Pro Build

#26 Post by Seth »

Grant Bunter wrote: Fri Apr 10, 2020 12:44 am
jimbo7 wrote: Thu Apr 09, 2020 10:24 pm No. Just 2x2, 4x4, 6x4
Oh! My older plans have a 6 piezo option...
Pretty sure that's what Jim meant by 6x4. If there was a 3 piezo option in the plans for the 2x cab, that's what I'd have chosen. That said, in the little bit of relatively low level listening I did, two tweeters doesn't sound lacking at all. I'm a little astonished at their output, how well they blend in, and how well they sound. Speaking about the tweeters, but the whole speaker cab too.

I did construct the cabs mirror imaged, so when one is up-ended and stacked on the other the tweeters are close together, hopefully retaining most of the line array benefits when configured that way.

I'll put a little EQ and power to them tomorrow afternoon and give you guys my impression.


What are your guys' thoughts on grills for these? I'd like something metal for it's protective qualities, but it would also be nice to not easily see the drivers through the grill. How would you go about it? Cloth over metal, cloth under metal, foam... ?
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

Bruce Weldy
Posts: 8301
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: 2x6 SLA Pro Build

#27 Post by Bruce Weldy »

If you use a metal grill, put the A/C foam behind it. That's the best look for metal. The other option is to do a compression fit grill using a frame and grill cloth....like on a guitar amp. If you are hauling them to gigs, then I'd probably go with metal. If they stay at home, the grill cloth is fine...

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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Bill Fitzmaurice
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Re: 2x6 SLA Pro Build

#28 Post by Bill Fitzmaurice »

There's no three tweeter option because you can't wire three tweeters series/parallel.

Bruce Weldy
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Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: 2x6 SLA Pro Build

#29 Post by Bruce Weldy »

Bill Fitzmaurice wrote: Fri Apr 10, 2020 7:25 am There's no three tweeter option because you can't wire three tweeters series/parallel.
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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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Seth
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Location: Sacramento, California, USA
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Re: 2x6 SLA Pro Build

#30 Post by Seth »

Bill Fitzmaurice wrote: Fri Apr 10, 2020 7:25 am There's no three tweeter option because you can't wire three tweeters series/parallel.
I'm guessing there's a reason three in series would be of no advantage? I have zero grasp on the concept of them being capacitive loads and the effect of wiring them differently. Physically, it's possible to wire 3 series/parallel with one short leg and in the world of ohms I know the result. In the world of capacitance... duhhhhhhhh ummmmm :noob:
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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