Joe's Omni 15 Tallboy
Joe's Omni 15 Tallboy
Started on my Tallboy this weekend.
For anybody else near Denver Colorado, I found Baltic Birch at Consolidated hardwoods for a decent price. 1/2 inch 5x5 was $45 a sheet.
Here's the basic cab shell: Baffle cut was made with a jigsaw (very slowly): Baffle installed: Everything is screwed and glued which helps assembly proceed without waiting for glue to dry. I'll most likely pull the screws when finished and fill with bondo before sanding everything.
When sitting on it's base there is a very minor wobble (bottom is not totally flat) I haven't decided if I should try to force it out using bar clamps or just make up for it when I install the feet. It's only about 1/8" off but it bugs me.
For anybody else near Denver Colorado, I found Baltic Birch at Consolidated hardwoods for a decent price. 1/2 inch 5x5 was $45 a sheet.
Here's the basic cab shell: Baffle cut was made with a jigsaw (very slowly): Baffle installed: Everything is screwed and glued which helps assembly proceed without waiting for glue to dry. I'll most likely pull the screws when finished and fill with bondo before sanding everything.
When sitting on it's base there is a very minor wobble (bottom is not totally flat) I haven't decided if I should try to force it out using bar clamps or just make up for it when I install the feet. It's only about 1/8" off but it bugs me.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Re: Joe's Omni 15 Tallboy
One thing I forgot to mention. In my excitement to get the woofer mounted on the baffle I forgot to epoxy the hurricane nuts. Is that going to cause problems for me?
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Re: Joe's Omni 15 Tallboy
Love watching TallBoy builds, thinking of doing one myself soon...
Don't know, but now's the time to go and fix it. Then you won't have to worry about it.jdmrivera wrote:One thing I forgot to mention. In my excitement to get the woofer mounted on the baffle I forgot to epoxy the hurricane nuts. Is that going to cause problems for me?
-todd
5 and 8 string bass | SansAmp | Crown | 2 x J110
2 x W8 panel-mount
2 x T39 24" 3012LF
4 x OT12 2512 melded (finally done!)
5 and 8 string bass | SansAmp | Crown | 2 x J110
2 x W8 panel-mount
2 x T39 24" 3012LF
4 x OT12 2512 melded (finally done!)
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- Posts: 1648
- Joined: Wed Mar 25, 2009 7:07 pm
- Location: Medicine Hat, Alberta, Canada
Re: Joe's Omni 15 Tallboy
The problem with hurricane nuts is when they spin and you have no access to the other side like in the titan/tuba builds. On the tallboy you always have access to the back side.jdmrivera wrote:One thing I forgot to mention. In my excitement to get the woofer mounted on the baffle I forgot to epoxy the hurricane nuts. Is that going to cause problems for me?
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience
Re: Joe's Omni 15 Tallboy
Thanks. Does anybody have any neat tricks for getting them out and re-inserting without damaging the wood. I suppose I could insert a bolt and try to tap them out.jdmrivera wrote:Don't know, but now's the time to go and fix it. Then you won't have to worry about it.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
-
- Posts: 8323
- Joined: Fri Nov 27, 2009 11:37 am
- Location: New Braunfels, TX
Re: Joe's Omni 15 Tallboy
jdmrivera wrote:Thanks. Does anybody have any neat tricks for getting them out and re-inserting without damaging the wood. I suppose I could insert a bolt and try to tap them out.jdmrivera wrote:Don't know, but now's the time to go and fix it. Then you won't have to worry about it.
Don't even try. At this point, use 'em the way they are. As CO said, if you have to get to 'em at some point in the future, just take off the back.
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."
Re: Joe's Omni 15 Tallboy
Well there ya go. Bad advice from me.Bruce Weldy wrote: Don't even try. At this point, use 'em the way they are. As CO said, if you have to get to 'em at some point in the future, just take off the back.
![Disappointed :slap:](./images/smilies/slap.gif)
I would've inserted a bolt and tapped them out, but I trust Bruce to steer ya right.
![Happy :cowboy:](./images/smilies/cowboy.gif)
-todd
5 and 8 string bass | SansAmp | Crown | 2 x J110
2 x W8 panel-mount
2 x T39 24" 3012LF
4 x OT12 2512 melded (finally done!)
5 and 8 string bass | SansAmp | Crown | 2 x J110
2 x W8 panel-mount
2 x T39 24" 3012LF
4 x OT12 2512 melded (finally done!)
Re: Joe's Omni 15 Tallboy
Noob alert
The drivers I have range from 45 watts RMS for the tweeter to 450 watts RMS for the woofer. Based on advice from Bill I'll likely never use more than 100 watts for this system but even at that level what prevents the tweeter from receiving those 100 watts? Is it crossover or amp magic? (I realize I should be talking volts but the speakers are all 8 ohms so I think the comparison is correct)
![Confused :conf:](./images/smilies/icon_e_confused.gif)
The drivers I have range from 45 watts RMS for the tweeter to 450 watts RMS for the woofer. Based on advice from Bill I'll likely never use more than 100 watts for this system but even at that level what prevents the tweeter from receiving those 100 watts? Is it crossover or amp magic? (I realize I should be talking volts but the speakers are all 8 ohms so I think the comparison is correct)
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
- Bill Fitzmaurice
- Site Admin
- Posts: 28646
- Joined: Tue May 02, 2006 5:59 pm
Re: Joe's Omni 15 Tallboy
Power density is halved (-3dB) with each octave increase in frequency.
Re: Joe's Omni 15 Tallboy
Thanks Bill. I'm not sure what the relationship is from power density to watts or volts. I'm just trying to understand what it is that will keep me from frying my tweeter or midrange since the woofer handles more power. If there is a reference or link you can point me too that'd be great. I've looked up some info on power density and too much math for me.Bill Fitzmaurice wrote:Power density is halved (-3dB) with each octave increase in frequency.
![Shocked :shock:](./images/smilies/icon_eek.gif)
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
-
- Posts: 676
- Joined: Tue Apr 30, 2013 5:56 pm
- Location: Colonial Beach VA
Re: Joe's Omni 15 Tallboy
Think of it this way:
It takes a lot more energy to make bass waves than treble waves.
If the crossover is doing its part, bass waves will not go to the tweeter.
It takes a lot more energy to make bass waves than treble waves.
If the crossover is doing its part, bass waves will not go to the tweeter.
BFM rig:
6 OT12
4 T48
4 WH8
Other:
56 box Electrotec LabQ rig
Way too many cables
![Confused :noob:](./images/smilies/frantic4yc.gif)
6 OT12
4 T48
4 WH8
Other:
56 box Electrotec LabQ rig
Way too many cables
![Confused :noob:](./images/smilies/frantic4yc.gif)
Re: Joe's Omni 15 Tallboy
As long as you are using recommended drivers from the plan, and the crossover networks from the plan, then no worries. You will be able to hear all the drivers complain before you get close to the limits. The crossover allows only the bandpass frequencies through. Since the highs (tweeter) and mids (mid-woofer) take a lot less power than the lows (woofer) the correct power is distributed to the correct range.jdmrivera wrote:Noob alert![]()
The drivers I have range from 45 watts RMS for the tweeter to 450 watts RMS for the woofer. Based on advice from Bill I'll likely never use more than 100 watts for this system but even at that level what prevents the tweeter from receiving those 100 watts? Is it crossover or amp magic? (I realize I should be talking volts but the speakers are all 8 ohms so I think the comparison is correct)
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Re: Joe's Omni 15 Tallboy
OK - I'll quit worrying and keep building!DJPhatman wrote:As long as you are using recommended drivers from the plan, and the crossover networks from the plan, then no worries. You will be able to hear all the drivers complain before you get close to the limits. The crossover allows only the bandpass frequencies through. Since the highs (tweeter) and mids (mid-woofer) take a lot less power than the lows (woofer) the correct power is distributed to the correct range.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Re: Joe's Omni 15 Tallboy
Hopefully I'll start on the mid horn parts tonight. Any advice on cutting all those angles without losing any finger tips?
Seems like table saw is most appropriate with correct setup but I could also try my bandsaw.
![Hopeful :fingers:](./images/smilies/crossfingers.gif)
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array
-
- Posts: 8323
- Joined: Fri Nov 27, 2009 11:37 am
- Location: New Braunfels, TX
Re: Joe's Omni 15 Tallboy
jdmrivera wrote: Any advice on cutting all those angles without losing any finger tips? .
Keep your fingers away from the blade?
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)
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."