Announcement

Collapse
No announcement yet.

Dayton Audio GF180-4 Graph

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

  • #16
    Originally posted by Chris Roemer View Post

    What software are you modeling this with?
    I was using Jeff Bagby's Passive Crossover Designer. Oh....are you saying there may be a different result with different software?

    Comment


    • #17
      This doesn't look horrible to me, for that little tweeter,
      2nd order HP w/L-pad AND series resistance: 1n(ohm) series resistor and 5uF series cap, then a 0.20mH shunt coil (to gnd), lastly an "L": SR=2n / PR=6n.

      (This is what I modeled on the woofer)
      1st order w/Zobel: 0.45mH series coil (w/an RC "bypass" - 4n + 2.2uF cap for a 5k notch), (shunt) Zobel-thing using 8ohms + 33uF.

      Runs around 81dB (full BSC) w/Fc near 3kHz. Tweeter's attenuated about -8dB.

      Try this .frd for the tweeter:

      TD20jica.FRD

      Comment


      • #18
        Try using ALT Codes to insert the Omega (Ohms) symbol:

        NumLock = ON, ALT 234 = Ω

        Comment


        • #19
          Regarding a different tweeter, I do have a set of Peerless BS25SC02-4. This is what I mapped with those. Same spikes though.

          Attached Files

          Comment


          • #20
            Check the phase #s on your woofer measurement at those frequencies. See if they aren't jumping between 180 and -180 degrees.
            Isn't it about time we started answering rhetorical questions?

            Paul Carmody's DIY Audio Projects
            Twitter: @undefinition1

            Comment


            • #21
              Originally posted by Paul Carmody View Post
              Check the phase #s on your woofer measurement at those frequencies. See if they aren't jumping between 180 and -180 degrees.
              That's beyond my level of experience.

              Comment


              • a4eaudio
                a4eaudio commented
                Editing a comment
                I don't find that tweeter with a simple search... Can you provide a link to the tweeter and attach copies of your frd files for both drivers?
            Working...
            X