Bass/Keyboard cab. Omni 12 Tallboy.

High power and fidelity from an easy to build cabinet.
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unkycraig
Posts: 29
Joined: Tue Jul 06, 2021 5:09 pm
Location: El Cerrito, CA

Bass/Keyboard cab. Omni 12 Tallboy.

#1 Post by unkycraig »

Yup,
I chose the right cab to build for a bass rig. That is what my eyes are telling me. As I sand and scrape glue off this box, I thump it around to hear what tone it has. It has a little bark to it already. The tubas I built, when they were all done, but one side, had a bunch of different tones as you knocked on the baffle and all the other radiating parts. That is good information, I have no idea how to apply, use, or adjust it. It is just impressive, the musical~ness of the structure. I am listening to this with my eyes of course, I should paint it with Duratex and be done. I can help myself, I have the time, so I sand. Way too nice for me now, I will have to become a better bass player. I chose this because there are some keyboard bass lines, with a bunch of mid info, I wanted to explore, this rig will handle all the input coming in.

A few build notes. That mid horn, make sure you keep nails away/out of the parts you have to trim. Use two spacer jigs for making that first step on the horn, really hard to keep them parallel with just one, and glue and expanded metal grill. Superior mess. I might agree with the 4 over all degree of build difficulty. maybe a 5, moments of 6. So far I love this thing, can't wait to hear it.

These pics loaded sideways. if you click 'em they right themselves.
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In Progress: Omni 12 Tallboy Bass
Complete: 4 Tuba 24, 2 SLA PRO 4x6

In the wings: DR250(probably not), 4 Wedgehorn 10s(probably), 2 More SLA 4x6s,

Dbx Driverack PA2
Dbx EQs 215, 2231
Dbx X-O 223xs
3 QSC GX7
3 JBL JRX212s

ACUA
Posts: 509
Joined: Sun Sep 25, 2016 6:21 pm

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#2 Post by ACUA »

That looks amazing
Advanced concepts underground audio

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Tom Smit
Posts: 7266
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#3 Post by Tom Smit »

Looks sweet.
TomS

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Chris_Allen
Posts: 3340
Joined: Wed Jul 11, 2007 2:43 pm
Location: Huddersfield, UK

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#4 Post by Chris_Allen »

One of my favourite sounding bass cabs - looks awesome too.
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

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Seth
Posts: 2229
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
Contact:

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#5 Post by Seth »

Dang, Craig! You're really turning the cabs out. Way to go man. That one looks fantastic. Very 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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unkycraig
Posts: 29
Joined: Tue Jul 06, 2021 5:09 pm
Location: El Cerrito, CA

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#6 Post by unkycraig »

Well.... I fired it up. cone slap on the baffle. I cut that 45 degree edge, not enough though. I tested them out with the uninstalled baffle, but not at high enough volume. Gutted the box. Went after the edge with a die grinder and an air belt file. !0 minutes later I was right on the edge of that crushed gasket. I saved the 45 degree, it sounds great. Put one more felt pad in there. Trimmed the speaker wires again for the input jack and glued and zip tied some speaker wires to the braces. I heard something rattling, never figured it out, but all that extra work took care of it. Cut 4 reliefs along the back cover for getting a long hex wrench at the four hidden mounting bolts. Super satisfied. This thing sucks a lot of power. 4 ohms 2 x 10 version. My little Eden 405 has the fan running trying to cool down. It did not run the fan for my Avatar 2 x 10. Both cabs use Em kappapro.
In Progress: Omni 12 Tallboy Bass
Complete: 4 Tuba 24, 2 SLA PRO 4x6

In the wings: DR250(probably not), 4 Wedgehorn 10s(probably), 2 More SLA 4x6s,

Dbx Driverack PA2
Dbx EQs 215, 2231
Dbx X-O 223xs
3 QSC GX7
3 JBL JRX212s

Grey Owl
Posts: 215
Joined: Fri Mar 20, 2009 10:38 pm
Location: New Zealand, User 1603

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#7 Post by Grey Owl »

Nice job. Do yhou have final photo's to show??
You have two ears and one mouth. Use them in the same ratio!!

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Radian
Posts: 2009
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#8 Post by Radian »

Outstanding build! Loving it. :clap:
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite

CarterKraft
Posts: 151
Joined: Thu Oct 22, 2020 1:46 pm
Location: DFW

Re: Bass/Keyboard cab. Omni 12 Tallboy.

#9 Post by CarterKraft »

More pix 😉
It looks awesome.
Weldon Carter

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