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Thread: Feedback eliminators?

  1. #1
    Forum Member Kap'n's Avatar
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    Feedback eliminators?

    I guess I posted this in the wrong place...

    Anybody know anything about these? After spending a bunch of time with manual EQ, it's pretty apparent I have no idea what freq's are which slider.

    Anyway, I've got this nifty Sam Ash coupon burning a hole in my pocket....find your best deal, and then they beat it by 20%! I'm looking at one of these:

    dbx AFS224

    Any thoughts? Worth $240?
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  2. #2
    Forum Member chuckocaster's Avatar
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    Re: Feedback eliminators?

    i'd rather spend 20 bucks on a soundhole feedback buster. i personally think those "automatic" ringout systems are garbage. but then again, live sound is my job. they work okay but sound a little funky...just my 2 cents
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  3. #3
    Forum Member Kap'n's Avatar
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    Re: Feedback eliminators?

    Chuck, not the acoustic duo, electric band stuff.

    BTW, I tried one of those rubber sound hole things once. That thing killed more tone than a wall of Peavey stacks.
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    ZoneFiend photoweborama's Avatar
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    Re: Feedback eliminators?

    I've used them, not my stuff, but a system I ran. But we used it for voice, not music. They work great with speech. Music has too many frequencies it thinks is feedback. It does really weird things to music.

    Plus it only has a few frequencies it can lock out. Like 8 with 2 floating frequencies. But you have to bypass it if you are running music through it...
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    Forum Member Kap'n's Avatar
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    Re: Feedback eliminators?

    Well, we're primarily running vox through it, but I've started to run a bit of guitar through it as well.

    I think I'll pass for now.
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  6. #6
    ZoneFiend photoweborama's Avatar
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    Re: Feedback eliminators?

    There are single channel eliminotors you can run a single mic through. Maybe that will work.

    Also, I take it back. Sabine has eliminators that will work with music.
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  7. #7
    Forum Member Kap'n's Avatar
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    Re: Feedback eliminators?

    Quote Originally Posted by photoweborama
    Also, I take it back. Sabine has eliminators that will work with music.
    Right, but those cost a LOT of money. I think I'll just deal with maunal EQ. Maybe someday, the technology will be there.
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    Re: Feedback eliminators?

    Like they say, “Necessity is the mother on invention”. Or in this case, playing with the EQ longer. :hee
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    Re: Feedback eliminators?

    Quote Originally Posted by chuckocaster
    i personally think those "automatic" ringout systems are garbage.
    That seems to be the opinion of everyone I've ever heard voice one.

    No personal experience with these, but I've heard a lot of dismissive statements from soundguys. For whatever that's worth.
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  10. #10
    Forum Member chuckocaster's Avatar
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    Re: Feedback eliminators?

    i guess i got it confused kap'n.

    do you have parametric eq on your pa system? if so, the easiest way to find what is feeding back is to do about a 10db cut and then sweep the freq til you find it. go slow and i'm sure you'll be able to get it.

    another little tip is when you find the offending frequency and how much you have to cut, take that freq and divide it in half. then cut about half of the db needed from the offending and the octave below. does that make sense? this works really well cause you're not loosing the musicality of your speakers but still ridding the feedback. you might need to tweak it a little, but that is what has worked for me a lot.

    also, cutting out some lows from the speakers usually helps clean things up. really nobody in the band is gonna sing down below 100-150 hertz, unless barry white is a back up singer...:ahem
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  11. #11
    Forum Member Kap'n's Avatar
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    Re: Feedback eliminators?

    Thanks for the tips, Chuck-O. No parametric yet. Just a dual 15-band Rane. I'll probably be scouring ebay for one at some point. Any suggestions?
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  12. #12
    Forum Member chuckocaster's Avatar
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    Re: Feedback eliminators?

    honestly man, practice ringing out your speakers at home. it sounds dumb but practice makes perfect. just make sure the other people in the house are gone or you might be sleeping outside...

    you just need to train your ears and learn to apply that to what frequencies to vut. the easiest way is to figure out high/mids/lows and start cutting a little til you find it.

    kinda hard to explain over the interweb, but the basic idea is like how you learned to hear that your guitar is out of tune.
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  13. #13
    Forum Member Kap'n's Avatar
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    Re: Feedback eliminators?

    Quote Originally Posted by chuckocaster
    honestly man, practice ringing out your speakers at home. it sounds dumb but practice makes perfect. just make sure the other people in the house are gone or you might be sleeping outside...

    you just need to train your ears and learn to apply that to what frequencies to vut. the easiest way is to figure out high/mids/lows and start cutting a little til you find it.

    kinda hard to explain over the interweb, but the basic idea is like how you learned to hear that your guitar is out of tune.
    Yep, I'll be doing some of that this weekend.

    I didn't know what "in tune" really meant until I got my Justina Quartz back in the 80's. Man that developed my ear quickly!
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  14. #14
    Forum Member chuckocaster's Avatar
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    Re: Feedback eliminators?

    good luck man, i know you'll figure it out. another thing that helps is to think of the frequencis as notes (cause that's what they are). people sometimes forget about that when doing sound. it doesn't have to be pristine, but it does need to be musical.
    "don't worry, i'm a professional!"

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