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  • #61
    THAT looks pretty close to what you've measured!

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    • #62
      Originally posted by scottvalentin View Post
      THAT looks pretty close to what you've measured!
      yes it does ... with that and what rpb suggested with the 225 tuned down -6db ...

      Paper Towers
      RS180P/28F surrounds
      Boombox

      Comment


      • #63
        OK, I got my sim pictures. I can't see yours, so I don't know how similar they are. Your hosting site wants me to sign up or something to see your pictures.

        I did several sims. This one crosses lower, and needs a bigger coil.
        Attached Files

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        • #64
          Here's the woofer.
          Attached Files

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          • #65
            Here's the mid. I didn't take my own advice about the resistor location. Not on this one anyway.
            Attached Files

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            • #66
              Tweeter I guessed at the offsets.
              Attached Files

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              • #67
                my pics just dont show ? or you're clicking on them to see them betterb?


                i've only used Xsim and at the risk of sounding ignorant i can't really read PCD .....
                Paper Towers
                RS180P/28F surrounds
                Boombox

                Comment


                • #68
                  When I click on them to enlage, there's a problem. I can see them before clicking, but can't read many of the values.

                  Here's a partial sim with a higher woofer x-over. Steeper slope to push down the breakup.
                  Attached Files

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                  • #69
                    ok , after looking at them i think i get what your doing ... will put it into Xsim in the morning ....

                    rite now i'm drinking cold beer and jam'in some Zep ... i plugged in one of my surrounds and turned on my subs , i nailed the mtm ! sounds great ...


                    Paper Towers
                    RS180P/28F surrounds
                    Boombox

                    Comment


                    • #70
                      The best part of doing x-overs is the audition following the work!

                      The mid is 2nd order electrical high pass, and damped second order low pass with a notch added at 10k.

                      The tweeter has a notch at 20k to pull the top end down.

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                      • #71
                        Originally posted by rpb View Post
                        The best part of doing x-overs is the audition following the work!

                        yep , my favorite part of building !
                        Paper Towers
                        RS180P/28F surrounds
                        Boombox

                        Comment


                        • #72
                          I like to check the mid padding resistor for heat while playing at close to maximum spl.

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                          • #73
                            Originally posted by rpb View Post
                            OK, I got my sim pictures. I can't see yours, so I don't know how similar they are. Your hosting site wants me to sign up or something to see your pictures.

                            I did several sims. This one crosses lower, and needs a bigger coil.
                            In my humble opinion I think this sim by rpb will sound much better. The W/M xo point is lower with shallower slopes. The M/T xo is higher which should allow that small ribbon to play cleaner/louder. Basically there is a lot more contribution from the pair of mids, which is good. I'd give it a listen with and without the notch on the tweeter. You may like the extra top end lift.
                            Craig

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                            • #74
                              i don't under stand pcd , in the the mid circuit where do i put the LCR and resistor ?
                              Paper Towers
                              RS180P/28F surrounds
                              Boombox

                              Comment


                              • #75
                                Originally posted by filmslayer View Post
                                i don't under stand pcd , in the the mid circuit where do i put the LCR and resistor ?

                                The L ,C, and R are connected end to end with each other. (in series). Then, after the other x-over parts it connects in parallel with the mids. (There is no R on this mid sim.)

                                Same idea on the tweeter.

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