Announcement

Collapse
No announcement yet.

Best crossover point between 400hz and 1000hz?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Best crossover point between 400hz and 1000hz?

    When a passive crossover is Necessary and time alignment is Not Possible. Is there a less problematic to the ears frequency between 400hz and 1000hz to cross over at?
    Two very good sociological markers.
    The state of our public wash rooms.
    How we treat each other behind the safety of a monitor and key board.

  • #2
    There are too many variables to just pick a crossover frequency. The best crossover frequency will depend on the drivers being used along with the baffle they are on. IMO in a properly designed crossover there really no problematic area if the drivers are up to task.

    Comment


    • #3
      Anything below 800Hz can be an issue, so it's an area to be avoided.
      www.billfitzmaurice.com
      www.billfitzmaurice.info/forum

      Comment


      • #4
        Originally posted by Music is life View Post
        When a passive crossover is Necessary and time alignment is Not Possible. Is there a less problematic to the ears frequency between 400hz and 1000hz to cross over at?
        My advice is to not make this choice strictly an intellectual exercise ( ie; let your ears also guide you ).

        I listen to a lot of my favourite classical music through horns only ( using various compression drivers ) to assess the drivers ability in the lower octaves ( using various passive crossover topologies ).

        Classical music can sound surprisingly full range with a second order 750 hz crossover point ( & I can hear the grunge start to take hold when using a simple first order with smaller diaphragmed drivers ).

        Comment


        • #5
          Originally posted by billfitzmaurice View Post
          Anything below 800Hz can be an issue, so it's an area to be avoided.
          Parts start costing more the lower you go too.

          Comment


          • #6
            Forgot to say that in this application the midrange (horn) will be in front of the midbass (horn) and not behind it, if that makes a difference.
            Two very good sociological markers.
            The state of our public wash rooms.
            How we treat each other behind the safety of a monitor and key board.

            Comment


            • #7
              Originally posted by billfitzmaurice View Post
              Anything below 800Hz can be an issue, so it's an area to be avoided.
              Can you elaborate?

              Comment


              • #8
                Originally posted by Music is life View Post
                Forgot to say that in this application the midrange (horn) will be in front of the midbass (horn) and not behind it, if that makes a difference.

                I'd advise you to at least align the voice coils belonging to the two different horn drivers ( that's way better than a kick in the pants ).

                .
                Last edited by EarlK; 04-15-2018, 11:51 AM.

                Comment


                • #9
                  Originally posted by killa View Post
                  There are too many variables to just pick a crossover frequency. The best crossover frequency will depend on the drivers being used along with the baffle they are on. IMO in a properly designed crossover there really no problematic area if the drivers are up to task.
                  Yeah and specifics* about the "midrange (horn) and the midbass (horn).

                  * Horn cutoff frequencies, Dispersion patterns of Horns
                  Last edited by Sydney; 04-15-2018, 11:29 AM.
                  "Not a Speaker Designer - Not even on the Internet"
                  "If the freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter."

                  Comment


                  • #10
                    Originally posted by philthien View Post
                    Can you elaborate?
                    Time align is most critical in the 300-700Hz range, to the extent that it can be very audible when it's off, so if you lack the ability to time align either by physical placement or electronic means you're better off not crossing over there, choosing your drivers accordingly.
                    www.billfitzmaurice.com
                    www.billfitzmaurice.info/forum

                    Comment


                    • #11
                      The project for consideration will have a midbass with a 54" path length (about. folded horn with one wide turn). The midrange will be from 14 to 26" depending upon crossover and so then driver choice. The tweeter and midrange will be physically time aligned. The midrange and midbass cannot but will of course need to be in phase at crossover point.
                      Lowest possible crossover is 225 to 250hz. Hightest possible is 800hz maybe 1000hz.

                      Thanks for the input.
                      Two very good sociological markers.
                      The state of our public wash rooms.
                      How we treat each other behind the safety of a monitor and key board.

                      Comment


                      • #12
                        An application like this is where an active digital system shines. Digital delay can be placed on the mid and tweeter so that all the drivers are time aligned.
                        Francis

                        Comment


                        • #13
                          Originally posted by fpitas View Post
                          An application like this is where an active digital system shines. Digital delay can be placed on the mid and tweeter so that all the drivers are time aligned.
                          Indeed. I might be moving overseas in 2 or 3 years. Speakers, no problem even large horns, right in the container. Electronics often a problem with voltage difference. So that's a lot of amps and stuff, potentially the wrong voltage.
                          Two very good sociological markers.
                          The state of our public wash rooms.
                          How we treat each other behind the safety of a monitor and key board.

                          Comment


                          • #14
                            Originally posted by billfitzmaurice View Post
                            Time align is most critical in the 300-700Hz range, to the extent that it can be very audible when it's off, so if you lack the ability to time align either by physical placement or electronic means you're better off not crossing over there, choosing your drivers accordingly.
                            Hi,
                            This is new info for me. I trust it is true but it would be interesting to leran more on Why this region is more vulnerable to cross in.

                            And what to do IF you want to use a 10-12 woofer. 1000 Hz is much.....

                            Regards// Lasse
                            Perry Mason talking to his dentist:

                            "Do you swear to take the tooth, the whole tooth and nothing but the tooth, so help you God?"

                            Comment


                            • #15
                              Originally posted by lasse View Post
                              it would be interesting to leran more on Why this region is more vulnerable to cross in.
                              That's where our ears are most sensitive to the effects of delays between multiple sources.
                              And what to do IF you want to use a 10-12” woofer. 1000 Hz is much.....
                              Use a pair of eights instead.

                              www.billfitzmaurice.com
                              www.billfitzmaurice.info/forum

                              Comment

                              Working...
                              X