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Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit midwestaudiofest.com for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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  • #46
    Sh!t !!!! when i plug in my laptop i'm getting a massive low frequency hum .... not sure what thats about but it throw's huge wrench in my plans ....
    Paper Towers
    RS180P/28F surrounds
    Boombox

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    • #47
      PHEW !!! got that issue sussed for now . not sure if it is with my laptop or receiver but i changed HDMI inputs and all seems to be working now ...

      this ribbon amazes me , was super hot yet still sounded pretty good . this is after a resistor change on the tweet . went from 1 to 2.2 ... going to 3.3 next ....


      Paper Towers
      RS180P/28F surrounds
      Boombox

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      • #48
        a lil bigger swing . went to 4ohm on the tweet and added 1ohm to the mids ... getting close ...



        Paper Towers
        RS180P/28F surrounds
        Boombox

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        • #49
          That's looking really good to start - interesting that the ribbon can sound so good even when it is a bit hot

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          • #50
            Originally posted by scottvalentin View Post
            That's looking really good to start - interesting that the ribbon can sound so good even when it is a bit hot

            i think it was just the change . it got forward quick ...

            the latest change . 5ohm on tweet , 1.8ohm on the mid





            this sounds really good .
            Paper Towers
            RS180P/28F surrounds
            Boombox

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            • #51
              Looking good!

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              • #52
                Originally posted by filmslayer View Post


                i think it was just the change . it got forward quick ...

                the latest change . 5ohm on tweet , 1.8ohm on the mid





                this sounds really good .
                A couple of suggestions if you're interested.

                Your measurements don't seem to be changing much with the resistor changes. I would go back to the sim, and see what was supposed to happen, vs what did happen. On the mid, I would add the resistor after the x-over. I suspect that after the x-over will work better on the tweeter too. Sometimes a resistor in parallel with a driver is a good thing too, since it tends to level the impedance.

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                • #53
                  here is my sim as it's playing , keep in mind my files are all factory . i'm thinking i'm dealing with BSC and not trying to make huge changes . i'm open to to changes but like to do my padding before filter for ease .what would you suggest ? i can attach the Neo file if you want to play along .



                  Paper Towers
                  RS180P/28F surrounds
                  Boombox

                  Comment


                  • #54
                    I'm looking at your measurement in post 47 compared to post 50. I don't see much difference. There may be good reason for that though. Three ways take some trial and error, and your ears tell you as much as the measurements sometimes.

                    I'd love to play along.

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                    • #55
                      let me see if i can do it . i believe i got all zipped already .
                      Paper Towers
                      RS180P/28F surrounds
                      Boombox

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                      • #56
                        here's the frd , thet say me my zipped file is invalid .
                        Attached Files
                        Paper Towers
                        RS180P/28F surrounds
                        Boombox

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                        • #57
                          i cant find the Z file in my documents when i try to attach a file but it in there when i open Xsim ..... i am not good with a computer ! but being a ribbon it is a flat 5 ohm line ...

                          i'l keep trying .
                          Paper Towers
                          RS180P/28F surrounds
                          Boombox

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                          • #58
                            i will not be defeated !!!!! bwahahah
                            Attached Files
                            Paper Towers
                            RS180P/28F surrounds
                            Boombox

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                            • #59
                              the rs225-8 and ds90 files i pulled from PE . heads up , don't buy that 89db on the 225 ..
                              Paper Towers
                              RS180P/28F surrounds
                              Boombox

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                              • #60
                                my sim when i tune the 225 - 6db ...

                                Paper Towers
                                RS180P/28F surrounds
                                Boombox

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