The difference is about 200hz between the OTop8 and the OTop12. I get that. But, I am not understanding what "axial output" is (even after I did a quick search).Bill Fitzmaurice wrote: ↑Mon Jul 27, 2020 9:11 pmIt does. The narrower the enclosure the wider the dispersion. This applies down to the frequency where the enclosure width is one wavelength. At that point dispersion is 180 degrees. Below that you lose axial output, because the dispersion is wider than 180 degrees, so this sword has two edges.SethRocksYou wrote: ↑Mon Jul 27, 2020 7:06 pm More specifically, the dispersion angle of the mid range. Enclosure width wouldn't matter?
Scaling way back! Lots of questions
Re: Scaling way back! Lots of questions
TomS
Re: Scaling way back! Lots of questions
Side question on the T48:
If my maximum width for my pack space is 18” should I go with a 15” driver? 18” would be the narrowest, I feel like it’s right on the line and could go with a 12 or a 15, guess a 15 would yield more output.
If my maximum width for my pack space is 18” should I go with a 15” driver? 18” would be the narrowest, I feel like it’s right on the line and could go with a 12 or a 15, guess a 15 would yield more output.
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
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- Location: Ilfracombe Queensland Australia
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Re: Scaling way back! Lots of questions
G'day Seth
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...
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...
- Bill Fitzmaurice
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Re: Scaling way back! Lots of questions
The output on a straight line out from the speaker. It falls off below the baffle step frequency, where the baffle is 1 wavelength, as below that the sound wraps around the speaker. It's the same effect as when you go from half space to full space boundary loading.
Re: Scaling way back! Lots of questions
Ok guys it’s official, listed all my speakers and amps for sale here, on eBay, and Marketplace.
AND got my plans for the T48 and Otop 8
AND got my plans for the T48 and Otop 8
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
- Chris_Allen
- Posts: 3355
- Joined: Wed Jul 11, 2007 2:43 pm
- Location: Huddersfield, UK
Re: Scaling way back! Lots of questions
"Scaling way back"
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10
Re: Scaling way back! Lots of questions
Mostly back, ha!
Well if I only had a slim pair of T48s and a pair on Otops8s at least I could fit that in my basement. Currently that’s not an option.
Going back a touch... if 18” was my max width should I go with the 15” driver option?
Well if I only had a slim pair of T48s and a pair on Otops8s at least I could fit that in my basement. Currently that’s not an option.
Going back a touch... if 18” was my max width should I go with the 15” driver option?
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
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- Posts: 8301
- Joined: Fri Nov 27, 2009 11:37 am
- Location: New Braunfels, TX
Re: Scaling way back! Lots of questions
It's right there on page one of the plans.....you can put a 15 in an 18 inch wide cab.
And on the next to the last page of the plans - the voltage limit for the 15s are higher than the limit for the 12s......so yeah, use the 15.
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: Scaling way back! Lots of questions
Lightweight amplifier recommendations?
Thoughts on the QSC GX amps?
Thoughts on the QSC GX amps?
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
-
- Posts: 8301
- Joined: Fri Nov 27, 2009 11:37 am
- Location: New Braunfels, TX
Re: Scaling way back! Lots of questions
GX3 and 5 are not light. GX7 is.....it's an entirely different amp from the other two..
I've always used the Crown XLS series - very light and have served me well. But, the QSC GX7 are really nice amps....I've run those in another rig for several years.
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: Scaling way back! Lots of questions
Ok fellas, I had a guy come over this morning for a demo, and we got the cops called on us!!! Most epic!
The cops were totally cool with it all, I should of asked for a picture with them. Oh well maybe next time
Me and my little helper, in the back!
The cops were totally cool with it all, I should of asked for a picture with them. Oh well maybe next time
Me and my little helper, in the back!
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
Re: Scaling way back! Lots of questions
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
Re: Scaling way back! Lots of questions
Well the system is sold time to think about rebuilding .
So we’ve gone over the T48 and a pair of 3015 loaded is probably the best bang dollar per size.
I wonder How four slim T39s would compare loaded with the kappa pro 10lf?
So we’ve gone over the T48 and a pair of 3015 loaded is probably the best bang dollar per size.
I wonder How four slim T39s would compare loaded with the kappa pro 10lf?
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
Re: Scaling way back! Lots of questions
Four 10" loaded (Not the 3010LF, but response should be relatively similar) T39 slims compared to 2 18" T48's @ 2.83v.
(Edit: Changed to 18" T48's after re-reading the thread)
Adding 24dB to the T39 trace for max output, 26.5dB to the T48 for it's max
To my eye, looks like the T39 slim is the better option.
(Edit: Changed to 18" T48's after re-reading the thread)
Adding 24dB to the T39 trace for max output, 26.5dB to the T48 for it's max
To my eye, looks like the T39 slim is the better option.
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
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