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  1. #1

    question about powering speakers

    Hi, I was reading the manial for a new mixer I just got, and it says that I need powered speakers. I can not find any powered speakers anywhere. So what if I got an amp, would I be able to pwoer the speakers with the amp? If so, What do I connect the speakers up to on the amp?
    Thanks.
    Regards,
    Ivan Fegundez. Recording Technician, live sound technician, and mastering technician.

  2. #2
    You should be able to run an output to an amp for unpowered speakers, yes, but I am unaware of a mixer that has such an output for "powered speakers". What make and model is this?
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

  3. #3
    Quote
    Quote: tonsofpcs
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    You should be able to run an output to an amp for unpowered speakers, yes, but I am unaware of a mixer that has such an output for "powered speakers". What make and model is this?

    I have a Yamaha mg 124, and it said that I neded powered speakers, it does not suppor them. So where would I connect the mixer to on the amp to gget audio to the speakers?
    Regards,
    Ivan Fegundez. Recording Technician, live sound technician, and mastering technician.

  4. #4
    For the MG-124c or MG-124cx, you use either the 1/4" or XLR outputs on the top-right of the board to go to your power-amp. For the MG-12/4 or MG-12/4FX, on the back, to the far right [when viewed from the front, far-left when viewed from the rear] there is a set of Main outputs if this feed is for your house sound, Control Room (CR) outputs if this is for your control room monitors (PFL solos will come through on CR, not on Main)
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

  5. #5
    Quote
    Quote: tonsofpcs
    View Post
    For the MG-124c or MG-124cx, you use either the 1/4" or XLR outputs on the top-right of the board to go to your power-amp. For the MG-12/4 or MG-12/4FX, on the back, to the far right [when viewed from the front, far-left when viewed from the rear] there is a set of Main outputs if this feed is for your house sound, Control Room (CR) outputs if this is for your control room monitors (PFL solos will come through on CR, not on Main)

    Ok, but what connection do I use on the amp it self?
    Regards,
    Ivan Fegundez. Recording Technician, live sound technician, and mastering technician.

  6. #6
    Not sure what your amp is, but most have a set of line-level inputs labeled with either L/R or channel-1/2, some have just a series of inputs with pan pots to choose which channel they are output to. standard is: 1 is left, 2 is right (if it is labeled with 0 and 1, 0 is left and 1 is right).

    Always remember to have your equipment off [or at least turned down all the way] when connecting new devices to its inputs.
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

  7. #7
    Quote
    Quote: tonsofpcs
    View Post
    Not sure what your amp is, but most have a set of line-level inputs labeled with either L/R or channel-1/2, some have just a series of inputs with pan pots to choose which channel they are output to. standard is: 1 is left, 2 is right (if it is labeled with 0 and 1, 0 is left and 1 is right).

    Always remember to have your equipment off [or at least turned down all the way] when connecting new devices to its inputs.
    From what my sighted help told me, all there is on the amp is aux left aux rite, I do not have a output or what ever.
    Any suggestions?
    Also, do the speakers need to have a serton wottage for the amp?
    Regards,
    Ivan Fegundez. Recording Technician, live sound technician, and mastering technician.

  8. #8
    Can you get the Amp's make and model?
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

  9. #9
    All I know is that this is a radioshack amp.
    Regards,
    Ivan Fegundez. Recording Technician, live sound technician, and mastering technician.

  10. #10

    mixer/amp connection

    When the mixer says you need a powered speaker, all that means is that the mixer itself does not have a power amp. If you don't have powered speakers, the Radio Shack amp will work fine.

    If the RS amp has only "aux" inputs - one for each channel, I assume - that means it's the RS stereo amp, with 8-ohm outputs. This should be perfect.

    An aux input is simply an unbalanced line-level input. The output of your mixer is line level, so that's a match. The only potential problem is that the mixer output is probably balanced (not familiar with this model). The proper way of connecting it is as follows:

    Mixer end: get a 3-conductor (balanced) 1/4in plug or the proper XLR connector.

    Wire the tip of the plug or pin 2 of the XLR connector to the signal pin of the amplifier aux input.

    Wire the sleeve of the plug or pin 1 of the XLR connector to the ground (shell) of the aux input.

    Wire nothing to the sleeve of the plug or pin 3 of the XLR connector. This is important. A balanced output is, nowadays, really two out-of-phase unbalanced outputs, and connecting the sleeve or pin 3 to ground (as is often done) simply shorts one of the outputs. Outputs don't like this. They make distortion, sometimes they make smoke. Simply treat the mixer-to-amp interface as an unbalanced line throughout.

    Re: power, you're pretty safe if you choose a speaker that has a continuous power rating equal to or greater than the amp power, and if you never drive the amp into distortion.

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