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Got enough juice for your power amps?

Discussion in 'Pro Audio Equipment' started by killersoundz, Jun 30, 2005.

  1. killersoundz

    killersoundz Guest

    I was just looking at the specs on the behringer ep2500 power amp and I realized it says that baby sucks 9.6amps. Now at that rate on a normal 15 amp circuit that you'd encounter a lot, you couldn't even run 2 of them on one could you? I highly doubt it's 9.6amps continuous unless its pushing max power, right? whats the opinion. Also, although these power amps are rated to run at 2 ohms, how much more demanding is that on the amp and is it a good idea? Just curious because if you daisy chain 2 4ohm cabinets together then thats 2 ohms so yeah...
     
  2. Kev

    Kev Well-Known Member

    It is advertised as a 2 x 1200 watt into 2 ohms unit

    that's 2400 watt and would rate our wall socket here in Australia to MAX

    and that's assuming 100% efficiency

    You just can't get away from the math and yes the current has to come from somewhere

    Put a smaller fuse in it and see if it blows ... you may learn something about current draw
     
  3. killersoundz

    killersoundz Guest

    Well the watts an amp outputs is in...speaker talk, not really current draw, but yeah somewhat I don't think if an amp puts out 2000w at 2ohm that mean it's drawing 2000watts, it may be drawing more or less. :lol:

    What i'm getting at is what do people do that run like 4 power amps like I'm planning on doing. If I do a gig i'm going to have to hook each power amp upto a different circuit from what it seems. Unless it's a nice hall or whatnot and has some nice big 50amp circuits or something.
     
  4. killersoundz

    killersoundz Guest

    One thing I just noticed in the behringer ep2500 manual is that at 2ohms its only rated at 1khz, not 20hz-20khz, only 8 and 4 ohms are rated for that. so basically 2 ohms is a whole lot of resistance, but they advertise it capable of running at 2 ohms, would i blow one up running it at 2 ohms?
     
  5. 9.6 amps is draw at 1 Hz at unity gain (knobs fully clockwise).

    That comes from an electrician here. I've ran 4 of them together through a Monster PowerPro that showed the current draw and even playing Ying Yang Twins at 110 dB (RMS) 25 ft. from the stacks I was only pulling 11 amps max.

    Also, they run just fine at 2 Ohms.
     
  6. Kev

    Kev Well-Known Member

    4 of these amps all running into 2 ohms may cause trouble with you basic outlets.

    You should have a current meter for your power distriburtion ... just as the Lighting fellow has.

    Never try to run full power with a 20kHz sine wave.
    That's probably asking for trouble, even if they do say 20/20 at 4 and 8.


    Brian has the best info for you,
    I don't know what Ying Yangs are but the 11 amps gives you a real world figure to go by.
    If you had a current meter on your system you would know your total power usage at any time.
    As you system gets bigger and more demanding these are the tools of the trade you must carry with you.
     

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