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Stacking Mixer+Amp?

Discussion in 'Sound, Music, and Intercom' started by TheDonkey, Feb 17, 2009.

  1. TheDonkey

    TheDonkey Active Member

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    This Friday, our school's hosting a local school district drama festival, and for an after party, we have a local(from within the school) band playing,

    Problem is, they're playing in our small drama space(a classroom with a stage built in), and the way it was designed, the booth is totally out-of-the-way, for lighting, it's survivable as you can see the stage, but for sound, it's brutal because you end up being "around the corner" from the actual speakers so it becomes problematic.

    So I'm thinking of taking the mixer and Amp down from the "booth" and putting them off stage,

    Would it be alright to place the amp on a table, then put the mixer right on top? I don't think is would be a problem, but the big amp coils may cause feedback in the wiring? (I really don't know, just asking)
     
  2. hsaunier

    hsaunier Active Member

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    You might consider leaving the amp in the closet and just extend your send lines to the amp from the mixer, otherwise you are going to have to extend speaker line which can sometimes be harder to come by. The problem of stacking a mixer on top of an amp could, but not necessarily, cause some 60 cycle buzz. You should never get "feedback" from that configuration as "feedback" is an event where audio frequencys are picked up by an open mic and looped constantly through the system creating a constant tone often hurting ones ears.
     
  3. museav

    museav CBMod CB Mods Departed Member

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    Admittedly, you didn't note how large the room is or how the system is wired or what any of the components are, but I'm not clear on why you would need or want to move the amp. Also, not knowing anything about the room or system or what the band requires, I would not be surprised if what is wanted for a live band differs from the system installed in your drama space. Might it be easier to borrow or even rent a portable PA for the band rather than to try to use the room's system?
     
  4. mbenonis

    mbenonis Wireless Guy Administrator Premium Member

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    Strictly speaking, this is just one type of feedback. You can just as easily feed something back by connecting the output of a device to its own input and ensuring that there is some gain from input to output (no matter how small). :)
     
  5. museav

    museav CBMod CB Mods Departed Member

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    Or feedback is having an open loop gain greater than 1, without changes or control the system amplifies itself.
     
  6. TheDonkey

    TheDonkey Active Member

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    That's the Amp is just on a regular 'ol table, so taking it down to the stage is no problem.

    By feedback, I meant the 60hz buzz, I knew what I wanted, just didn't know how to say it >.<

    The way we have it now is The amp and mixer are right next to each other on a table/counter, mixer plugs into amp, amp has 2 big long TS cables that reach to the speakers.

    If I were to take it down to the stage, I'd just run some "new" (temporary) cable from the amp to the speakers.


    I was going to take pictures today, but completely forgot, and tomorrow's soundcheck, so I'll be somewhat on my own for the rest of it,


    But thanks for the responses anyways.
     

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