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Author Topic: Audio power from quiet generator?  (Read 18026 times)

Sean Lehman

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Re: Audio power from quiet generator?
« Reply #20 on: March 18, 2014, 05:11:11 PM »

ha, I modified my message but i guess it didn't post. 

Furman PL PLUS C

Yes, but WHAT FURMAN....dammit.
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Ray Aberle

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Re: Audio power from quiet generator?
« Reply #21 on: March 18, 2014, 05:56:03 PM »

ha, I modified my message but i guess it didn't post. 

Furman PL PLUS C

Problem solved.

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Kelcema Audio
Regional - Serving Pacific Northwest (OR, WA, ID, BC)

Sean Lehman

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Re: Audio power from quiet generator?
« Reply #22 on: March 18, 2014, 06:08:36 PM »

Problem solved.

man and i thought i was using efficient stuff....lol
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Ray Aberle

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Re: Audio power from quiet generator?
« Reply #23 on: March 18, 2014, 06:12:05 PM »

man and i thought i was using efficient stuff....lol
I was being tongue-in-cheek snarky, but dude, I'm just gonna mention that the good feeling of knowing that you will have more then enough power for your entire show, and having it properly voltage regulated is absolutely worth the rental charge.

Now, looks like your gig was a parade, though, which means that might have been more difficult to pull off if the truck doesn't have a trailer hitch on the flatbed... they do make these on skids though, which could be forked onto the truck.

-Ray
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Kelcema Audio
Regional - Serving Pacific Northwest (OR, WA, ID, BC)

James A. Griffin

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Re: Audio power from quiet generator?
« Reply #24 on: March 18, 2014, 06:46:48 PM »

Yes, but WHAT FURMAN....dammit.

Dick, he has been very clear in all his posts..  it was THE Furman.

:-)
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I need to determine where in this swamp of unbalanced formulas squatteth the Toad of Truth

Ray Aberle

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Re: Audio power from quiet generator?
« Reply #25 on: March 18, 2014, 06:50:15 PM »

Dick, he has been very clear in all his posts..  it was THE Furman.

:-)

James, make another post FAST! You're at 666 posts........ *cringes*
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Kelcema Audio
Regional - Serving Pacific Northwest (OR, WA, ID, BC)

Sean Lehman

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Re: Audio power from quiet generator?
« Reply #26 on: March 18, 2014, 07:40:58 PM »

Dick, he has been very clear in all his posts..  it was THE Furman.

:-)

It wasn't only the itech being affected...it was amps and monitors plugged in pre furman. 
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Steve Alves

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Re: Audio power from quiet generator?
« Reply #27 on: March 18, 2014, 10:25:21 PM »

I have two of the 3000is gennies. If you hit the over-current protection you can not reset it without turning the gennie off and restarting. The breakers will only go if there is a short. I have had issues with running to close to capacity and a sudden bass note throws it into overload.

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Steven Alves
South Florida Sound, Fort Lauderdale, FL
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Tommy Peel

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Re: Audio power from quiet generator?
« Reply #28 on: March 19, 2014, 01:28:41 AM »

I did a gig last year with 2x Mackie SA1521, 2x Mackie SRM450, and 2x Mackie SR1500 powered speakers and FOH and some backline on a 2kw inverter generator(equivalant to the Honda EU2000i). I got everything going,  checked the generator and the Ol light was coming on regularly; I ended up noting on the mixer's meter where that was(as a don't go any higher than this point) and turning the master fader down till the OL light stayed off. After that the gig was fine. We weren't running very loud though,  it was just a 5k run with a church band playing CCM. I definitely couldn't have gotten Full-Tilt Boogie© out of the system if I'd wanted to. 😀

Sent from my Nexus 4 running OmniROM 4.4 KitKat using Tapatalk Pro
« Last Edit: March 19, 2014, 01:31:59 AM by Tommy Peel »
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TJ (Tom) Cornish

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Re: Audio power from quiet generator?
« Reply #29 on: March 19, 2014, 09:02:40 AM »

It wasn't only the itech being affected...it was amps and monitors plugged in pre furman.
I think there are a couple factors/lessons here:

- Small generators don't have much of a current reserve.  Even if your average usage is less than the average capacity of your generator (the breaker doesn't trip), the spikey demands of audio may push your instantaneous demand higher than the generator can cope with; the result being the generator shuts down.  The same load on shore power would perhaps be OK, since the grid is big.
- Running sound outdoors is deceiving if you're primarily used to playing inside.  Without the room to contain the energy, you need 2x-4x the power outside to have it feel the same as inside.  The result is you were probably running hotter than you thought you were.  Increasing your volume by 3dB doubles your power consumption, so it's entirely possible that your same equipment run to the same perceived level will draw 4X the power when used outside as when inside.
- Interconnecting generators can be dangerous, and can be done wrong in some ways that appear to work.  Unless your equipment has a specific procedure for combining the outputs of multiple generators together, you're far better off grounding the generator frames together and leaving the current-carrying wires unbonded, thus having two separate electrical supplies with a common ground.  Loads have to be manually balanced.
- One larger generator is better than multiple small generators.  A single Honda EU6500 is more capable than a pair of EU3000s, as the whole power system gets bigger - more reserve capacity, more current supply to spread the demand over.

It's actually quite difficult to accurately measure your power needs, and the trial and error method is frequently where requirements are finally figured out.  Remember that lowering your volume just 3dB halves your power consumption.
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ProSoundWeb Community

Re: Audio power from quiet generator?
« Reply #29 on: March 19, 2014, 09:02:40 AM »


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