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  • #76
    the 3ohm is part of the LCR ? and not separate ?
    Paper Towers
    RS180P/28F surrounds
    Boombox

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    • #77
      Originally posted by filmslayer View Post
      the 3ohm is part of the LCR ? and not separate ?
      The padding resistor is in front of the mid x-over on this sim.

      There's not actually a R on the midrange LCR. The resistance shown is whatever dcr the coil has. Smaller R yield a deeper notch. I edited post 75.

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      • #78
        I'll see if I can take a screen shot picture of the schematic used for PCD.
        Attached Files

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        • #79
          Tweeter
          Attached Files

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          • #80
            The 3 ohm in the tweeter LCR can be adjusted to fine tune output near 20k. If you want more at 20k, raise the R value to 5 or 6, etc.

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            • #81
              thats confusing AF ! 20 parts in a tweeter circuit ?
              Paper Towers
              RS180P/28F surrounds
              Boombox

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              • #82
                Originally posted by filmslayer View Post
                thats confusing AF ! 20 parts in a tweeter circuit ?
                Look to the left of the values in my sim. That identifies which part it is. The schematic shows all locations available. Only a few are used.

                The mid notch is parallel leg 2. Could be leg 1 or 3. I happened to use leg 2.

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                • #83
                  This forum software and my computer don't work well together. I have to reload, and log in again, and post within about 20 seconds, or it signs me out "due to inactivity". So some of my posts are rushed. Others, I copy, then reload, then log back in, then find the post I want to reply to, click on it, paste the copied reply, and click save. I've likely logged in more than 30 times in the last 2 hours.

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                  • #84

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                    • #85
                      i used -.10" on the mids and -.75" for the woofer assuming the tweet as 0 .. but after a good look at the tweet it sits back a bit so i'm not really sure .
                      Paper Towers
                      RS180P/28F surrounds
                      Boombox

                      Comment


                      • #86
                        Originally posted by rpb View Post
                        This forum software and my computer don't work well together. I have to reload, and log in again, and post within about 20 seconds, or it signs me out "due to inactivity". So some of my posts are rushed. Others, I copy, then reload, then log back in, then find the post I want to reply to, click on it, paste the copied reply, and click save. I've likely logged in more than 30 times in the last 2 hours.
                        i used to have the same problem also would log me out after what seemed like only 30sec. , do you check the remember me box to the left log log in button ? if not do it . i've been logged with no issues for 3 days now .
                        Paper Towers
                        RS180P/28F surrounds
                        Boombox

                        Comment


                        • #87
                          rpb , 2nd order mid and woofer and 3rd order tweet correct ? i should be able to suss it and get it laid out in Xsim . not sure if i'm gonna have all the parts on hand so we may need to tweak a bit 4.7mH for 5 and .2mh for .3 are two know already ....
                          Paper Towers
                          RS180P/28F surrounds
                          Boombox

                          Comment


                          • #88
                            Originally posted by filmslayer View Post
                            rpb , 2nd order mid and woofer and 3rd order tweet correct ? i should be able to suss it and get it laid out in Xsim . not sure if i'm gonna have all the parts on hand so we may need to tweak a bit 4.7mH for 5 and .2mh for .3 are two know already ....
                            My sim was just to give me something fun to do, and hopefully give you some ideas to try. Change whatever you need. I can look at your sim in PCD if I can read the values.

                            If you do a screen capture, and paste it in Paint, you can save it as a jpeg, and upload it to this forum.

                            Some of my second order filters may have an added resistor making them a damped 2nd order. This comes in handy on occasion.

                            One other thing. I play with PCD, but do my filters largely by trial and error. My driver zmas are not accurate, so I get less agreement between PCD, and actual response. So, I measure the filtered driver response to see if each driver is rolling off the way it should. Then I measure them together. At some point, I reverse a driver to see if there's a decent null. Then I listen while looking occasionally at the measurements. If I hear something slightly off, I can sometimes see it in the measurement, and make a small tweak. This is time consuming, but that's OK. With 3-ways, I make some additional close mic measurements to help me see what is happening down around 300hz better. My gated measurements become less accurate that low. But some how, some way, I arrive at a finished x-over. Usually, I scrap a 3-way design due to x-over complexity. I also prefer smaller speakers in my room, although I get the urge from time to time to make something massive. I think if big speakers weren't so heavy, I'd build more of them. I have a 7 cu-ft sub in my closet for HT use, but seldom need it for music.

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                            • #89
                              Originally posted by filmslayer View Post
                              i used -.10" on the mids and -.75" for the woofer assuming the tweet as 0 .. but after a good look at the tweet it sits back a bit so i'm not really sure .

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                              • #90
                                a long post , you found the remember me button ?

                                i understand and thats what i'm trying to do . i don't think i was that far off at all besides the fact that i was assuming a 89db woofer when in fact it's closer 83db .

                                my woofer is 2.4 mH , 40uF (s)

                                mid : 1.8r , 12uF ,2mH (s) , 30uF , .5mH , (4.7uF-3.3r) (s) .1mH

                                tweet : 5r , 3.3uF , .2mH (s) , 6.8uF , .5mH (s)

                                **** (s) denotes shunt ..
                                Paper Towers
                                RS180P/28F surrounds
                                Boombox

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