This is largely true for most of the current Class D offerings. To say that you can't run them on a generator is a bit of a misstatement. You can't run them on a small construction generator alone. Those generators have autorev mechanisms that depend on current to activate. Put a couple of lights on them and they'll stay revved... but then you're using a significant part of the available current for the lights.CoronaOperator wrote:inukes and generators are a no go.NukePooch wrote: I ran it for a weekend gig on generator, and it just couldn't keep up, so I sent it back.
The inukes have no power factor correction: none, zero, nada.
Class Ds work just fine on a properly sized commercial generator. As with anything, you have to do the math - since they gulp loads of power at once you just need a bigger generator and one that stays running all the time and can handle the load. If you have 10kw of Class D you probably need a 25-50kw generator to run them.
Is this measured or speculated? Lets use the IPR2-7500 as an example. It's supposed to be able to deliver ~7500 watts across it's two channels and requires a 20A circuit to do that. Well.. that's 7500 watts at 2 ohms (which by the way is less stable than they'd like you to believe... the amp will cut out before it gets there, ask me how I know). That's ~60A at 120V. It won't "gulp" any more power than that. The NU12000 would have a maximum theoretical intake of 100 amps. That's 1/4 of the total power my house is wired for. Eh... probably not going to happen in real life. My real life experience with the IPR2-7500s is that four of them can run with a four ohm load on each channel off of a 2 20a circuits and have all channels tickling the limiters without blowing a breaker. I have done this on mains power and on commercial generators with no problems. They're going to get another workout this weekend in nearly ideal circumstances on a commercial generator. Not worried in the least.They take an 80 amp gulp of current, then sit around for awhile, then take another gulp.