Joe's Omni 15 Tallboy
Re: Joe's Omni 15 Tallboy
Looks great! Too bad about the first one; I'm curious about how much difference that inch would make acoustically...
-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
Yeah, I wonder. Maybe somebody who knows will chime in. I resisted the urge to throw it in my burn barrelctmullins wrote:I'm curious about how much difference that inch would make acoustically...
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
You could just PL 1" strips, or the cutoffs, back on to save them. PL, wax paper, some wood cauls and some spring=loaded clamps, dampen the joints, lay down the PL, attach the strips, then spring clamps over wood cauls over wax paper. Give it a day or 2 to fully cure (bringing them into the warmer house helps a LOT) then sand and trim.jdmrivera wrote:Yeah, I wonder. Maybe somebody who knows will chime in. I resisted the urge to throw it in my burn barrelctmullins wrote:I'm curious about how much difference that inch would make acoustically...
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
General question about design.
The midrange driver is 6.5" diameter but the horn for it only has a 3.5" opening (less really with the plug) where the driver attaches to the horn. I'm curious how that works with covering up so much of the driver.
The midrange driver is 6.5" diameter but the horn for it only has a 3.5" opening (less really with the plug) where the driver attaches to the horn. I'm curious how that works with covering up so much of the driver.
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: 1648
- Joined: Wed Mar 25, 2009 7:07 pm
- Location: Medicine Hat, Alberta, Canada
Re: Joe's Omni 15 Tallboy
http://www.centauriaudio.com.au/diy/plugs.htmljdmrivera wrote:General question about design.
The midrange driver is 6.5" diameter but the horn for it only has a 3.5" opening (less really with the plug) where the driver attaches to the horn. I'm curious how that works with covering up so much of the driver.
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 for the link.CoronaOperator wrote: http://www.centauriaudio.com.au/diy/plugs.html
More pics tomorrow. Woofer is breaking in right now. I have midrange and tweeter cutouts done. Midrange horn installed and most internal braces done.
Would do pics tonight but my phone is busy playing 30hz tone for woofer break in.
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
Latest progress:
Back is cut and here I'm marking the hole locations. Back flanges, internal braces and horn installed. I've also installed t-nuts in the flanges to hold the back on. View from the front. I made one sanding pass to see where are all the spots that need filling with bondo.
After letting the large driver play all night on the bench with a 30hz tone at about 11 volts, I noticed a slight buzz that seemed to be coming from somewhere near the outside edge of the cone. Couldn't really identify exactly where. I'll turn it on again this evening and see if it's still doing it.
Back is cut and here I'm marking the hole locations. Back flanges, internal braces and horn installed. I've also installed t-nuts in the flanges to hold the back on. View from the front. I made one sanding pass to see where are all the spots that need filling with bondo.
After letting the large driver play all night on the bench with a 30hz tone at about 11 volts, I noticed a slight buzz that seemed to be coming from somewhere near the outside edge of the cone. Couldn't really identify exactly where. I'll turn it on again this evening and see if it's still doing 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
Re: Joe's Omni 15 Tallboy
Do this outside, as far away as you can from buildings and vehicles. 30Hz can cause so many objects to resonate.jdmrivera wrote:After letting the large driver play all night on the bench with a 30hz tone at about 11 volts, I noticed a slight buzz that seemed to be coming from somewhere near the outside edge of the cone. Couldn't really identify exactly where. I'll turn it on again this evening and see if it's still doing it.
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
Will do. I also picked up an Inuke NU3000DSP. Will be interesting to see if that makes any difference.DJPhatman wrote:Do this outside, as far away as you can from buildings and vehicles. 30Hz can cause so many objects to resonate.
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
Another noob question. The schematic for the bandpass crossover appears to show the negative end of the 22uf cap connected to the positive input from the amp. The capacitor I bought is polarized. Is there any issue with connecting the negative lead on the cap to positive input?
https://www.parts-express.com/ruby-gold ... r--020-668
https://www.parts-express.com/ruby-gold ... r--020-668
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: 1648
- Joined: Wed Mar 25, 2009 7:07 pm
- Location: Medicine Hat, Alberta, Canada
Re: Joe's Omni 15 Tallboy
Have you ever picked a dandelion and then held it in your hand and flicked off the flower? Cause if there is more than 3 or 4 volts going the wrong way through a polar cap that is what happens to the top of it. As audio is AC it gets current in both directions. I don't have the plans in front of me but I would double check to see if a polarized cap is acceptable.The capacitor I bought is polarized. Is there any issue with connecting the negative lead on the cap to positive input?
https://www.parts-express.com/ruby-gold ... r--020-668
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
The plans use this capacitor symbol on the schematic which is polarized. the plans don't specifically say polarized or not but they do mention electrolytic which I believe are normally polarized. At least the ones I bought are.CoronaOperator wrote: I don't have the plans in front of me but I would double check to see if a polarized cap is acceptable.
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
Well it turns out I was being dense - the woofer was face up on my bench and air was moving out from underneath the magnet. When I pick it up - no more buzz!After letting the large driver play all night on the bench with a 30hz tone at about 11 volts, I noticed a slight buzz that seemed to be coming from somewhere near the outside edge of the cone. Couldn't really identify exactly where.
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
Crossover caps are never polarized.
Re: Joe's Omni 15 Tallboy
I'm disappointed with parts express. All the caps I bougt from them look like this: Notice the arrow pointing to the negative lead. Guess I should have bought parts from Leland.Bill Fitzmaurice wrote:Crossover caps are never polarized.
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