First BFM build: SLA PRO 4x6

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Seth
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Re: First BFM build: SLA PRO 4x6

#16 Post by Seth »

Looking good Linus :thumbsup:

If any of those holes aren't sufficiently covered by the array, just cut out a plug with the jig saw and glue it in place. After it dries, make the tweeter body clearance cut with the jig saw.
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

Line92
Posts: 48
Joined: Wed Apr 15, 2020 12:54 am
Location: Sweden

Re: First BFM build: SLA PRO 4x6

#17 Post by Line92 »

Thanks for the tip Seth!
It seems that it will all be covered by the array, have to put some silicone to be sure its not leaking tho.

I have pretty much never used a router in my life, the one i use now i borrowed from a friend.
I thought is was impossible to make the 145mm diameter cuts when the radius of the router base is more than 72.5mm, but once now and then i apparently get really stupidly lucky...
Found a hole in the base of the router that with a 13mm "drill?bit?" got slightly over 72mm radius cuts, that will make a perfect fit for the 144.5mm diameter that the alpha 6a has.
Newbie luck i guess, feels fantastic because i did not want to make all the woofer holes with my crappy jigsaw!
Attachments
20201122_190507.jpg
20201122_190313.jpg
20201122_190103.jpg
SLA PRO 4X6
T60 2x20"
Labgruppen fP6400. fP2400Q. DBX Driverack PA2
TLAH
AT 20"
TRT

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

Re: First BFM build: SLA PRO 4x6

#18 Post by jimbo7 »

Probably too late, but if the router holes came out perfect, use the baffle to make a template for future holes.
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

Line92
Posts: 48
Joined: Wed Apr 15, 2020 12:54 am
Location: Sweden

Re: First BFM build: SLA PRO 4x6

#19 Post by Line92 »

Short update.
In the weeks i am pretty busy with other stuff, but managed to attach sides and top on both cabs yesterday.
Very excited to hear them now, cant wait :D
Attachments
20201127_070027.jpg
20201127_065646.jpg
20201125_224500.jpg
SLA PRO 4X6
T60 2x20"
Labgruppen fP6400. fP2400Q. DBX Driverack PA2
TLAH
AT 20"
TRT

Line92
Posts: 48
Joined: Wed Apr 15, 2020 12:54 am
Location: Sweden

Re: First BFM build: SLA PRO 4x6

#20 Post by Line92 »

Small update, first layer paint on, warnex on the outside and spraypaint on the inside/baffle.
Will sand it down manually with 300 papera and put 2 more layers of paint on i think.
Just ordered drivers and NL4s
Attachments
20201206_214329.jpg
20201210_224650.jpg
SLA PRO 4X6
T60 2x20"
Labgruppen fP6400. fP2400Q. DBX Driverack PA2
TLAH
AT 20"
TRT

User avatar
Seth
Posts: 2731
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: First BFM build: SLA PRO 4x6

#21 Post by Seth »

They look fantastic Linus. Good job man :thumbsup:
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: First BFM build: SLA PRO 4x6

#22 Post by Bruce Weldy »

Nicely done!

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

Re: First BFM build: SLA PRO 4x6

#23 Post by Tom Smit »

:clap:
TomS

Dale Hammer
Posts: 112
Joined: Wed Apr 04, 2012 1:30 pm
Location: Topeka, Kansas

Re: First BFM build: SLA PRO 4x6

#24 Post by Dale Hammer »

Looks very nice!

Line92
Posts: 48
Joined: Wed Apr 15, 2020 12:54 am
Location: Sweden

Re: First BFM build: SLA PRO 4x6

#25 Post by Line92 »

Another pic, just mounted the piezos
Attachments
20201216_212036.jpg
SLA PRO 4X6
T60 2x20"
Labgruppen fP6400. fP2400Q. DBX Driverack PA2
TLAH
AT 20"
TRT

Line92
Posts: 48
Joined: Wed Apr 15, 2020 12:54 am
Location: Sweden

Re: First BFM build: SLA PRO 4x6

#26 Post by Line92 »

And these corners you can see but not feel the joint between the plywood. I think this will be fixed with some more sanding and extra layers of paint. The router made a great job!
Attachments
20201215_230101.jpg
SLA PRO 4X6
T60 2x20"
Labgruppen fP6400. fP2400Q. DBX Driverack PA2
TLAH
AT 20"
TRT

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

Re: First BFM build: SLA PRO 4x6

#27 Post by Bruce Weldy »

Line92 wrote: Thu Dec 17, 2020 1:20 pm And these corners you can see but not feel the joint between the plywood. I think this will be fixed with some more sanding and extra layers of paint. The router made a great job!
When you sand, the sawdust gets in that little crack so that it feels totally flat, but when the paint hits it, it absorbs into the sawdust leaving the indention. So, after sanding, use some air to blow out the line, then fill it and re-sand.

We've all done it.....

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: First BFM build: SLA PRO 4x6

#28 Post by Seth »

Line92 wrote: Thu Dec 17, 2020 1:20 pm And these corners you can see but not feel the joint between the plywood. I think this will be fixed with some more sanding and extra layers of paint. The router made a great job!
On cab's I build, that drives me nuts and I go a little overboard in preventing it by skimming the entire cab with filler then essentially sand it all off before doing spot fills and a final sanding. I like my edges to give no hint of which panel overlays which. I haven't always been entirely successful. But, I'm getting better at it.

The good new is, the average person typically wont see the blemishes we, as the builder, see.

Bruce, great tip! I hadn't heard that one. Will add it to my personal finishing regiment :thumbsup:
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

Line92
Posts: 48
Joined: Wed Apr 15, 2020 12:54 am
Location: Sweden

Re: First BFM build: SLA PRO 4x6

#29 Post by Line92 »

All drivers mounted, and wiring done. :hyper:
Grille will look something like this, with metal behind and magnets to hold it down, not done yet tho :/

Tested the cabs and no airleaks or any problems!
Will do a proper review soon after some more testing but so far i am very impressed with these!
Very loud, "warm, clean and full" sound with good hifi feeling. Not like any other PA cab i ever listened to. Great midrange overall and treble is all there, clear but maybe a bit shy, they dont need EQ but i will probably make adjustmenst depending on where they get used.

I will post more pics after finishing paint and grille is done :D

Overall very pleased with this design, the help and tips/tricks from this forum. Thank you all!
Attachments
20201218_211407.jpg
20201218_211349.jpg
SLA PRO 4X6
T60 2x20"
Labgruppen fP6400. fP2400Q. DBX Driverack PA2
TLAH
AT 20"
TRT

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

Re: First BFM build: SLA PRO 4x6

#30 Post by Seth »

That's a good looking cab Linus. Good job, well done :thumbsup:
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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