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Hi I have two marantz amps witch cut in and out when run from

Hi I have two marantz amps (Pm-66 se and Pm 55) witch work fine when used with a cd player etc. However when I try to run them out of my allen & heath xone 92 dj mixer they start cutting in and out and clicking when they do it. Would you know why?
Regards Robert

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  • rdoublem Jun 08, 2010

    Hi Barbu51,
    Thanks for the reply its really helpful. Do you think this will do the job? http://cgi.ebay.co.uk/Samson-S-Plus-Ster...
    Or should I go for something better? Will a limiter effect the sound quality?
    Regards Robert

  • rdoublem Jun 09, 2010

    Hi Shpbling thanks for taking your time to help me. I am running from the output on the mixer into the input on the amp. So would it not be the other way round? Sorry if I am wrong I just want to build a better understanding of whats going on.
    Regards Robert

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  • Master
  • 447 Answers

In stereo terms your system is "clipping" which means you are pulling more amps than the system can handle. If it happens only when you use the mixer, I'm thinking the mixer cant handle the power. Check the specs, It should show maximum amp input.

Posted on Jun 04, 2010

  • Stephen Potts Jun 09, 2010

    Running the mixer after the amp is correct. This way the mixer takes the amplified sound and adjusts the different sound levels to your liking. Try it first with the amp turned 1/2, 3/4 of the way up and the mixer set at minimum levels. Play something with extended highs and lows, and turn up the mixer slowly. You are looking to hear when the sound starts to distort. If you hear no distortion, increase the amp power slowly, untill you get some, then turn it down. This ensures you will not overdrive the mixer.

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  • Master
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Hi Robert

To answer your question;

I`ve worked with allen&heath mixers installed in clubs/bars and most often we had to limit them because of the high peaks they can generate at the outputs.
What is probably happening is that those high peaks force your amps into clipping and the protection circuits are getting engaged.

The way to resolve that problem may be to install a limiter/compressor such as the dbx 160a in between your mixer and amps .
There are many different brand and type but you can look at the dbx by clicking HERE

Hope this help and happy listening.

Posted on Jun 04, 2010

Testimonial: "Very helpful, will look about for a limiter now."

  • Jacques Marin
    Jacques Marin Jun 08, 2010

    Hi again robert

    This actually looks pretty good and the price looks right (translated in canadian dollars)

    As for the sound quality you`ll get use to adjust it where it won`t be noticeable.

    I suggest you crank up the compression when you first get it , that will give you an idea when you hear the sound going like through mud. :)



    By the way: the "Samson" brand is popular on this side of the atlantic too.

    Cheers

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