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Junior Varsity
How powerful generator is needed for this PA system
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<blockquote data-quote="TJ Cornish" data-source="post: 129355" data-attributes="member: 162"><p>Re: How much generator?</p><p></p><p></p><p>All generators have some peak capacity, both from the rotational inertia of the generator, and in the case of inverter generators, some small amount from the inverter circuitry. <a href="http://forums.prosoundweb.com/index.php/topic,150467.msg1382767.html#msg1382767" target="_blank">Guy Holt wrote in a very long thread about inverter generators' ability to handle more loads than a conventional generator at the same rating in some cases</a>, and <a href="http://forums.prosoundweb.com/index.php/topic,150467.msg1382766.html#msg1382766" target="_blank">his findings that the EU6500's inverter is actually capable of 7680 watts continuous output</a>.</p><p></p><p>Inverter generators are less sensitive to non-linear loads (explained in the first link above). Additionally, when an inverter generator is hit with a dynamic load, the frequency remains stable, and voltage regulation is likely better as well, since the inverter circuitry reacts much faster than the conventional engine governor. When you hit a conventional generator with a dynamic load, the engine slows which causes the frequency to fluctuate, as well as whatever voltage consequences there are.</p><p></p><p>I did an outdoor show last Saturday with 3 ITech 12000HD amps, 4 Mackie SRM450s, and light back line on an EU6500. I wasn't pedal to the metal, but it was outside and going pretty good. I ran the ITechs at 240v and all the Mackies off one leg of the generator (only had one inline GFCI adapter with me), and had absolutely no problems. The generator usage meter was showing about 3500 VA when I looked at it at fairly full volume.</p><p></p><p>My ITechs are PFC amps and an argument could be made that they're easier on generators than some other amps, but nonetheless, they're pretty big dog amps and know how to consume power. I'm sure if I hit the rig really hard I could get in trouble on the EU6500, but I did a decently loud show with a system significantly larger than the OPs on 1/2 to 2/3 capacity of the EU6500.</p><p></p><p>I'm in Jay's camp that while it's all well and good to demand a 200KVA trailer generator for a backyard barbecue, that's not always practical. A successful business person will figure out how to make the show go on, safety issues excepted. In the case of my example gig, that was a $135/day eu6500 rental vs. $900 for a delivered, permitted, and setup 25KW diesel.</p><p></p><p>Also keep in mind that turning your system down 3dB will cut your power consumption roughly in half.</p></blockquote><p></p>
[QUOTE="TJ Cornish, post: 129355, member: 162"] Re: How much generator? All generators have some peak capacity, both from the rotational inertia of the generator, and in the case of inverter generators, some small amount from the inverter circuitry. [URL="http://forums.prosoundweb.com/index.php/topic,150467.msg1382767.html#msg1382767"]Guy Holt wrote in a very long thread about inverter generators' ability to handle more loads than a conventional generator at the same rating in some cases[/URL], and [URL="http://forums.prosoundweb.com/index.php/topic,150467.msg1382766.html#msg1382766"]his findings that the EU6500's inverter is actually capable of 7680 watts continuous output[/URL]. Inverter generators are less sensitive to non-linear loads (explained in the first link above). Additionally, when an inverter generator is hit with a dynamic load, the frequency remains stable, and voltage regulation is likely better as well, since the inverter circuitry reacts much faster than the conventional engine governor. When you hit a conventional generator with a dynamic load, the engine slows which causes the frequency to fluctuate, as well as whatever voltage consequences there are. I did an outdoor show last Saturday with 3 ITech 12000HD amps, 4 Mackie SRM450s, and light back line on an EU6500. I wasn't pedal to the metal, but it was outside and going pretty good. I ran the ITechs at 240v and all the Mackies off one leg of the generator (only had one inline GFCI adapter with me), and had absolutely no problems. The generator usage meter was showing about 3500 VA when I looked at it at fairly full volume. My ITechs are PFC amps and an argument could be made that they're easier on generators than some other amps, but nonetheless, they're pretty big dog amps and know how to consume power. I'm sure if I hit the rig really hard I could get in trouble on the EU6500, but I did a decently loud show with a system significantly larger than the OPs on 1/2 to 2/3 capacity of the EU6500. I'm in Jay's camp that while it's all well and good to demand a 200KVA trailer generator for a backyard barbecue, that's not always practical. A successful business person will figure out how to make the show go on, safety issues excepted. In the case of my example gig, that was a $135/day eu6500 rental vs. $900 for a delivered, permitted, and setup 25KW diesel. Also keep in mind that turning your system down 3dB will cut your power consumption roughly in half. [/QUOTE]
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How powerful generator is needed for this PA system
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