ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

How To Get Rid Of Feedback From a Live Sound System

Updated on February 20, 2014

How To Eliminate Feedback

Feedback is really annoying! It's one of those things that happens & most good sound engineers don't really want it! I work for a London sound hire company and I regularly have to eliminate feedback. In this hub we are going to look at my top tips on getting rid of feedback from a live sound system. I am going to concentrate on issues that happen in small venues, as I assume that is where most readers will be working!

Feedback Elimination

My number one tip is to go out and buy a graphic equalizer. I am going to assume most readers are on a tight budget with a small system, trust me when i say this is the only tip that will cost any money.

The process explained below is usually referred to as 'ringing out the room/system'.
What you do is set up your sound system as normal, set-up one microphone to start with, turn up the gain a little more than normal and then turn up the master fader slowly until you get to the point at which you start to hear the ringing of feedback.

TOP TIP - Do this in a silent room, so no bands 'warming up'.

The trick is to turn it up so slowly that there is only one frequency feeding back. Balance it so that it isn't getting any louder or quieter. From there, you need to have a guess at what frequency you can hear. High frequencies are to the right of the graphic EQ, low frequencies are towards the left. Turn down (or cut as it's known in the industry) one fader. If the feedback doesn't go away, you are no where near. Turn the fader back up and try one three to the left or three to the right until you notice a difference. From there you can fine tune it by seeing which fader that is close by has the best effect on the feedback. The trick is to get rid of the feedback by cutting a fader by the smallest amount, usually a couple of dB will do it.

TOP TIP - Having said that, i would usually cut the first two frequencies you hear by 6dB (usually around half way down). Because they are usually the most troublesome.

For those on a tight budget, I would buy a Behringer FGQ. These little beauties light up the fader that has the ringing frequency! Which makes it really easy to do what I just explained! If you are in Europe, buy one from Thomann here. If you are anywhere else, use the Amazon link on the screen above.

After finding and eliminating your first frequency, repeat the process by turning the microphone channel up a little more! Repeat until the microphone is loud enough to be heard with out it feeding back

This tip is tough so don't despair if it takes months to successfully guess where those pesky frequencies are! Once you have mastered what I described above, you should start to develop your own techniques on developing this simple idea to work for you and your system.

Cardioid - Place the monitor behind this one!
Cardioid - Place the monitor behind this one! | Source

Great Book That Is Perfect For Beginners

Tip number two, is allot simpler. As I said, I guess you are in small venues on small systems. If you are having issues with feedback from the main speakers, try and move them further away from the microphones. It sounds obvious but its a really simple trick that most people don't think about. The only issue is that moving your speakers further apart means you loose quality of sound directly in front of the stage so its a fine balance between the two (If you need sound directly in front of the stage that is.)

Tip Three - Heard of the 3 to 1 rule? If not, look it up! Basically, the further away you can get your main vocal microphones from each other, the more you can eliminate feedback.

Tip Four - If you have a problem with monitor feedback, (apart from using your graphic in tip one) a good tip to eliminate this is check what polar pattern your microphone has. This is basically the places the microphone picks up sound from. Check this article on polar patterns to find out more. If your microphone is a cardioid then its a good idea to have the monitor dirctly behind, because this is the point at which the microphone picks up the least amount of sound. If you have a hyper cardioid, then aiming the monitor slighting from the side is a good idea because this is where it picks up the least amount of sound!

Tip Five - Time for some serious shizzle. If you have a nice desk to play with and it has a phase button (Sometimes called polarity) on it (Looks like a zero with a line through it), you can get rid of some feedback using this great tip from Dave Rat. Check out the video below.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)