Question about Yamaha Emx88s Powered PA Mixer System

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Can I plug just one subwoofer into my Yamaha EMX88S? What kind of sub do I need to get for it? Do I need to have 2 subs plugged in for it to sound right? Do I daisy chain the subs with the A15 speakers I have or use the stereo output on the front?

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It is not reccomended to daisy chain passive subs with main speakers, because there is no crossover unit involved. you want a sub to have a crossover frequency around 100hz, so that only frequencies lower than this go through the subs, and not in the main speakers.

you could get away with 1 sub plugged into the mono output on the front, subs dont have to be stereo. you would need a self popwered sub, or an additional amplifier+crossover for passive subs. your best bet would to be to get a powered sub and hook it up to the front panel mono out. powered subs usually already have the crossover built--in.

Posted on Nov 25, 2010

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  • switchthetim Nov 25, 2010

    i am new to all of this so please excuse my ignorance. The only outputs on my EMX88S are Monitor, REC OUT, and 2 Stereo outputs (L and R) Where would I plug a sub in this situation? How do I get it to do just bass and my main speakers to do the rest? Once again I am very new to this =/

  • Matthew Spark
    Matthew Spark Nov 26, 2010

    you would plug the sub, if you had one, into the monitor output for mono sound. this will not be a powered output, so you will need either a passive subwoofer/power amp/crossover components, all seperate, or you will need a self-powered sub with the amp and crossover built in.

    the crossover is what will make sure that ONLY bass is coming into the subwoofers. there is, unfortunately, no practical way to cross over the main speakers, so you will have to turn the low frequencies down on the main board eq to get some of the bass out of the mains. if the corssover on the sub is at, say, 120 hz, then use the board main eq to pull those frequencies around and under 120hz out of the main speakers.

    if you have 2 subwoofers, hook them up to the front panel stereo outs, instead of the mono monitor out. again you will need either need active subs with built -in crossovers and amplifiers, or you will need seperate passive subs/crossovers/amps components.

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