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Inverting polarity and GBF

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  • Inverting polarity and GBF

    More of a theoretical question as I can't see it coming into play for me. First off, seems generally accepted that mixing mic types on the same monitor mix can lead to lower GBF than if you have identical mics. Are there any like-issues if you have identical mics but then flip polarity on one of them? This would (I would think) cause that mic to behave differently. Yeah, No, non-factor?

  • #2
    It will behave differently, will shift any GBF to a different frequency based on the distance from the mic to the monitor (effectively changing the delay in the feedback loop). May not be better or worse, but certainly different.
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
    Former product development engineer: Genz Benz, a KMC Music/Fender Musical Instruments Company, continuing factory level product support and service for Genz Benz

    Currently product development engineer: Mesa Boogie

    Comment


    • #3
      It will behave differently, will shift any GBF to a different frequency based on the distance from the mic to the monitor (effectively changing the delay in the feedback loop). May not be better or worse, but certainly different.
      -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Former product development engineer: Genz Benz, a KMC Music/Fender Musical Instruments Company, continuing factory level product support and service for Genz Benz

      Currently product development engineer: Mesa Boogie

      Comment


      • #4
        I've had a number of people swear that flipping polarity helps, even sometimes. But no one has ever been able to demonstrate it to me. I'm open to anyone describing a method to test this.



        As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.
        Don Boomer

        Comment


        • #5
          I've had a number of people swear that flipping polarity helps, even sometimes. But no one has ever been able to demonstrate it to me. I'm open to anyone describing a method to test this.



          As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.
          Don Boomer

          Comment


          • #6






            Quote Originally Posted by dboomer
            View Post

            I've had a number of people swear that flipping polarity helps, even sometimes. But no one has ever been able to demonstrate it to me. I'm open to anyone describing a method to test this.



            As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.




            I was once told something similar in that if you wired the monitors in reverse, it would help with GBF. Time for "Mythbusters"?

            Comment


            • #7






              Quote Originally Posted by dboomer
              View Post

              I've had a number of people swear that flipping polarity helps, even sometimes. But no one has ever been able to demonstrate it to me. I'm open to anyone describing a method to test this.



              As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.




              I was once told something similar in that if you wired the monitors in reverse, it would help with GBF. Time for "Mythbusters"?

              Comment


              • #8






                Quote Originally Posted by dboomer
                View Post

                I've had a number of people swear that flipping polarity helps, even sometimes. But no one has ever been able to demonstrate it to me. I'm open to anyone describing a method to test this.



                As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.




                Agreed on all counts.
                -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                Former product development engineer: Genz Benz, a KMC Music/Fender Musical Instruments Company, continuing factory level product support and service for Genz Benz

                Currently product development engineer: Mesa Boogie

                Comment


                • #9






                  Quote Originally Posted by dboomer
                  View Post

                  I've had a number of people swear that flipping polarity helps, even sometimes. But no one has ever been able to demonstrate it to me. I'm open to anyone describing a method to test this.



                  As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.




                  Agreed on all counts.
                  -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                  Former product development engineer: Genz Benz, a KMC Music/Fender Musical Instruments Company, continuing factory level product support and service for Genz Benz

                  Currently product development engineer: Mesa Boogie

                  Comment


                  • #10






                    Quote Originally Posted by dboomer
                    View Post

                    As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.




                    Is that because the same mics are more likely to share problem frequencies? (IE less problems to deal with?)



                    Or am I barking up the wrong tree with that...

                    Comment


                    • #11






                      Quote Originally Posted by dboomer
                      View Post

                      As far as mixing mics I find that using all the same mic is easier to deal with and therefore easier to get higher gbf. Assuming that the mics are all running at about the same gain. There are a bunch of exceptions to this of course.




                      Is that because the same mics are more likely to share problem frequencies? (IE less problems to deal with?)



                      Or am I barking up the wrong tree with that...

                      Comment


                      • #12
                        Yeah ... just fix it once and you fix them all (it's not really quite that simple however)
                        Don Boomer

                        Comment


                        • #13
                          Yeah ... just fix it once and you fix them all (it's not really quite that simple however)
                          Don Boomer

                          Comment


                          • #14
                            One has to pay attention to how the reversal interacts with the house spill. Sometimes it cleans up the mud, sometimes it's worse.

                            Comment


                            • #15
                              One has to pay attention to how the reversal interacts with the house spill. Sometimes it cleans up the mud, sometimes it's worse.

                              Comment



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