Voltage limit

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Tonyla
Posts: 29
Joined: Wed Jul 24, 2013 3:42 am
Location: Los Angeles, CA

Voltage limit

#1 Post by Tonyla » Fri Aug 10, 2018 1:05 pm

Somehow, I haven't been able to find the actual voltage limit for melded array omnitop12s loaded with Kappalite 3012HO. I'm sure that 30 volts is too low. Please help. Thank you.

Bruce Weldy
Posts: 6807
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Voltage limit

#2 Post by Bruce Weldy » Fri Aug 10, 2018 2:03 pm

Tonyla wrote:
Fri Aug 10, 2018 1:05 pm
Somehow, I haven't been able to find the actual voltage limit for melded array omnitop12s loaded with Kappalite 3012HO. I'm sure that 30 volts is too low. Please help. Thank you.
Going with half the rated power (200 watts at 8 ohms), You can go to 40 Volts.

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."

Tonyla
Posts: 29
Joined: Wed Jul 24, 2013 3:42 am
Location: Los Angeles, CA

Re: Voltage limit

#3 Post by Tonyla » Fri Aug 10, 2018 2:23 pm

Thank you Bruce.

Bruce Weldy
Posts: 6807
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Voltage limit

#4 Post by Bruce Weldy » Fri Aug 10, 2018 2:34 pm

I've never run my OT12s that hot as I have the 2512s in 'em. I can't help thinking that the array is going start sounding crappy at that kind of power......I could be wrong - I've just never taken them there. I don't really know what kind of limit there is on those.

Maybe Bill could enlighten us as to just how much you should be able to put to the piezos before they either sound bad or crap out...????

I don't think I've ever seen that discussion before....it's always about the driver, not the piezos.

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."

himhimself
Posts: 276
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: Voltage limit

#5 Post by himhimself » Fri Aug 10, 2018 2:46 pm

I've never run my OT12s that hot as I have the 2512s in 'em.
Bruce, I've seen pictures of you running two Otops a side outside. What kind of voltage are you typically sending to them? Looks like you have a pretty big venue, several hundred people. Plenty loud for live music outside? How far back does the crowd go from the stage?
2xT30 (20", 3012lf)
4xOtop Jarray

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Bill Fitzmaurice
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Re: Voltage limit

#6 Post by Bill Fitzmaurice » Fri Aug 10, 2018 3:07 pm

Piezos are rated for 25v, which gets doubled by having two banks in series, and the high pass filter gives some more capacity as well. I cant see running more than 40v into an OTop 12, that's enough to reach 125dB. For that matter 30v gets you to 120dB, which is pretty freaking loud.

Bruce Weldy
Posts: 6807
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Voltage limit

#7 Post by Bruce Weldy » Fri Aug 10, 2018 4:47 pm

himhimself wrote:
Fri Aug 10, 2018 2:46 pm
I've never run my OT12s that hot as I have the 2512s in 'em.
Bruce, I've seen pictures of you running two Otops a side outside. What kind of voltage are you typically sending to them? Looks like you have a pretty big venue, several hundred people. Plenty loud for live music outside? How far back does the crowd go from the stage?
At the Park series I do every summer, the crowd doesn't even start until you get back about 50 feet from the stage. Everybody sits back pretty far. The music can be heard and every word understood over a quarter of a mile away according to folks who have walked in from one of the far parking lots. There's usually between 300-500 in the crowd.....everyone sits where they like the volume.

I've never actually put a meter on the tops as typically I end up dialing them back about 1 or two clicks on the amp to keep from outrunning the subs. I doubt that they ever see 150 watts each.....probably less than 100.

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."

himhimself
Posts: 276
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: Voltage limit

#8 Post by himhimself » Fri Aug 10, 2018 8:31 pm

Thanks Bruce, exactly the kind of info I was looking for. I'm going to go with the Beta's - I'm convinced it will be more than adequate for my purposes and keep the cost very reasonable.
2xT30 (20", 3012lf)
4xOtop Jarray

Bruce Weldy
Posts: 6807
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Voltage limit

#9 Post by Bruce Weldy » Fri Aug 10, 2018 10:16 pm

himhimself wrote:
Fri Aug 10, 2018 8:31 pm
Thanks Bruce, exactly the kind of info I was looking for. I'm going to go with the Beta's - I'm convinced it will be more than adequate for my purposes and keep the cost very reasonable.
Sent you a PM...

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."

commander_dan
Posts: 461
Joined: Sun Feb 16, 2014 7:19 pm
Location: Perth, Western Australia

Re: Voltage limit

#10 Post by commander_dan » Sun Aug 12, 2018 6:57 pm

For reference I have the 3012HO OT12's limited at 35v which is just under where the woofer started to break up. Could probably limit at 38v but you can't really notice a difference in volume from 35 to 38 so no point.
Built:
6 T30 (24", 3012LF)
2 OT12 (MA, 3012HO)
2 T24 (18", 3010LF)

Running:
DCX2496
XTi 2002
XTi 4002
TRAKTOR Z2
TECHNICS 1210 Mk5's

Tonyla
Posts: 29
Joined: Wed Jul 24, 2013 3:42 am
Location: Los Angeles, CA

Re: Voltage limit

#11 Post by Tonyla » Wed Aug 15, 2018 12:42 am

Than you all for your input. 30 volts, is perfectly safe. I only asked. About raisint theclimit, because to my ears, it sounds like the limiter is clamping down too soon affecting the dynamics of the voices, and music.its most noticing indoors.

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