T48s and OT12s

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David Raehn
Posts: 670
Joined: Tue Apr 30, 2013 5:56 pm
Location: Colonial Beach VA

T48s and OT12s

#1 Post by David Raehn » Thu May 04, 2017 3:19 pm

Here's a video from my son's metering app (A weighted and calibrated to a certified meter) from an event on 4/29/17.

4 3015 loaded T48s in a row.
4 Delta Pro loaded OT12s.
Big Room.
The source track was the intro of Asia's "Countdown to Zero" Not a lot of high end in it. But I will get a more recent copy of "Deep Note" and build up my own test track.

https://www.youtube.com/watch?v=frc0WnIBcZs
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Last edited by David Raehn on Thu May 04, 2017 5:11 pm, edited 1 time in total.

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Chris_Allen
Posts: 3215
Joined: Wed Jul 11, 2007 2:43 pm
Location: Huddersfield, UK

Re: T48s and OT12s

#2 Post by Chris_Allen » Thu May 04, 2017 5:07 pm

Your URL didn't come through correctly, so here it is:

https://www.youtube.com/watch?v=frc0WnIBcZs

Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

David Raehn
Posts: 670
Joined: Tue Apr 30, 2013 5:56 pm
Location: Colonial Beach VA

Re: T48s and OT12s

#3 Post by David Raehn » Thu May 04, 2017 5:14 pm

Thanks, Chris. I corrected it in the post.
Keep in mind, I'm running the subs on a QSC RMX 1450, limited to 40v, and the mains on a QSC RMX 2450. When I get some time to swap the amps and reset the limiter we'll have another go at it!

CoronaOperator
Posts: 1475
Joined: Wed Mar 25, 2009 7:07 pm
Location: Medicine Hat, Alberta, Canada

Re: T48s and OT12s

#4 Post by CoronaOperator » Thu May 04, 2017 5:26 pm

109 dBA is "your ears are going to ring in under an hour" loud! :chainsaw:
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

Bruce Weldy
Posts: 6419
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: T48s and OT12s

#5 Post by Bruce Weldy » Thu May 04, 2017 5:28 pm

CoronaOperator wrote:109 dBA is "your ears are going to ring in under an hour" loud! :chainsaw:

A few weeks back, I was hitting 110 at FOH....with no guitars in the mix. I was just trying to get the other instruments somewhere close to them. Oh, and I had my earplugs in.

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
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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Bill Fitzmaurice
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Re: T48s and OT12s

#6 Post by Bill Fitzmaurice » Thu May 04, 2017 5:45 pm

David Raehn wrote:A weighted
:cop:
A weighting is NFG for other than industrial applications.
Image

CoronaOperator
Posts: 1475
Joined: Wed Mar 25, 2009 7:07 pm
Location: Medicine Hat, Alberta, Canada

Re: T48s and OT12s

#7 Post by CoronaOperator » Thu May 04, 2017 5:46 pm

Bruce Weldy wrote:
CoronaOperator wrote:109 dBA is "your ears are going to ring in under an hour" loud! :chainsaw:

A few weeks back, I was hitting 110 at FOH....with no guitars in the mix. I was just trying to get the other instruments somewhere close to them. Oh, and I had my earplugs in.
Recorded music usually has a much higher average then live but them guitars play right where your ears are most sensitive so I guess its a wash.
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

David Raehn
Posts: 670
Joined: Tue Apr 30, 2013 5:56 pm
Location: Colonial Beach VA

Re: T48s and OT12s

#8 Post by David Raehn » Thu May 04, 2017 8:51 pm

All good. Given the curve of the A weighted measurement, I think the system performed admirably. It was a bigger than average room for the type of event and I wanted to see what they'd do opened up a little. I don't run that hot during the event anyway. Just wanted to have some giggles...

I have to see if his app will do C or Z.

Another personal vote of confidence for the OT12s and T48s. :clap:

CoronaOperator
Posts: 1475
Joined: Wed Mar 25, 2009 7:07 pm
Location: Medicine Hat, Alberta, Canada

Re: T48s and OT12s

#9 Post by CoronaOperator » Thu May 04, 2017 9:11 pm

David Raehn wrote: I have to see if his app will do C or Z.
The built in mic on his phone won't do low frequencies very well, for that he will need one of these and the audiotools app to do C, Z doesn't really exist outside really expensive lab gear.

The above setup is as good as any other hobbyist measurement system although the resolution for the lower frequencies isn't the greatest. It's good to 127 dB. Louder than that you really want something like the galaxy meters.
David Raehn wrote: Given the curve of the A weighted measurement, I think the system performed admirably.
I'd say, 109 on the A scale is as loud as you'd ever want to subject your crowd to and even that is pushing it. When we do EDM events we hit ~138 dBC but are still lower than 109 on the A scale. Loud bass is fun, its the mids and highs that kill your ears.
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

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