Announcement

Collapse
No announcement yet.

My RS180 MTM Design

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

  • Re: My RS180 MTM Design

    Originally posted by Nassander View Post
    After several months of listening, here are my thoughts.

    I did build this as my "reference" vs my own buildings.

    First of all i have to say, that Jeff has done beautiful job. Mid range is as good as it can be from RS180. Tweeter is eh, tweeter. I have to say that i don't like this dayton very much. It's ok at least. Upper end shine is completely missing. Cymbals doesn't sound right. It reminds me of seas 27TBFCG/G.

    Listenability with some bad recordings is decent.
    Anyway this gives me good example of voicing loudspeaker. Rooms are so different.
    The upper end of the aluminum version of the RS28 drops off at 10kHz and above; I think that is what you are hearing. Some (maybe most) people do not miss it.

    The RS28F might work better for you, but would require some resistor tweaking or compensation for the rising response in the fabric dome.

    Comment


    • Re: My RS180 MTM Design

      Would like to hear about what you compared them to

      Originally posted by Nassander View Post
      After several months of listening, here are my thoughts.

      I did build this as my "reference" vs my own buildings.

      First of all i have to say, that Jeff has done beautiful job. Mid range is as good as it can be from RS180. Tweeter is eh, tweeter. I have to say that i don't like this dayton very much. It's ok at least. Upper end shine is completely missing. Cymbals doesn't sound right. It reminds me of seas 27TBFCG/G.

      Listenability with some bad recordings is decent.
      Anyway this gives me good example of voicing loudspeaker. Rooms are so different.

      Comment


      • Re: My RS180 MTM Design

        6th planet... I'm terribly sorry. I'm not sure how I missed your post. I used the RS28F with no changes to the xo and am perfectly happy with the results.
        Chris

        Comment


        • Re: My RS180 MTM Design

          Originally posted by jclin4 View Post
          The upper end of the aluminum version of the RS28 drops off at 10kHz and above; I think that is what you are hearing. Some (maybe most) people do not miss it.

          The RS28F might work better for you, but would require some resistor tweaking or compensation for the rising response in the fabric dome.
          I did the swap, RS28F are in place. Much more to my liking. Brilliant first notes!

          Comment


          • Re: My RS180 MTM Design

            Did you make any crossover changes?

            Originally posted by Nassander View Post
            I did the swap, RS28F are in place. Much more to my liking. Brilliant first notes!
            I was so much older then, I'm younger than that now.
            OS MTMs http://techtalk.parts-express.com/sh...d.php?t=220388
            Swope TM http://techtalk.parts-express.com/sh...d.php?t=221818
            Econowave and Audio Nirvana AN10 fullrange http://techtalk.parts-express.com/sh...d.php?t=216841
            Imperial Russian Stouts http://techtalk.parts-express.com/sh...=1#post1840444
            LECBOS. http://techtalk.parts-express.com/sh...ghlight=lecbos

            Comment


            • Re: My RS180 MTM Design

              Originally posted by fastbike1 View Post
              Did you make any crossover changes?
              No.

              Comment


              • Re: My RS180 MTM Design

                Bump. Need to bump this above all the darn spam.

                Comment


                • Re: My RS180 MTM Design

                  You can always subscribe.
                  I was so much older then, I'm younger than that now.
                  OS MTMs http://techtalk.parts-express.com/sh...d.php?t=220388
                  Swope TM http://techtalk.parts-express.com/sh...d.php?t=221818
                  Econowave and Audio Nirvana AN10 fullrange http://techtalk.parts-express.com/sh...d.php?t=216841
                  Imperial Russian Stouts http://techtalk.parts-express.com/sh...=1#post1840444
                  LECBOS. http://techtalk.parts-express.com/sh...ghlight=lecbos

                  Comment


                  • Re: My RS180 MTM Design

                    Tweeters outside (as seen in first post) or inside?

                    Comment


                    • Re: My RS180 MTM Design

                      Personal preference. I'm pretty sure Jeff just put them on the floor for a quick photo. You'll notice there's no wiring to the cabs.

                      Originally posted by Wushuliu View Post
                      Tweeters outside (as seen in first post) or inside?
                      I was so much older then, I'm younger than that now.
                      OS MTMs http://techtalk.parts-express.com/sh...d.php?t=220388
                      Swope TM http://techtalk.parts-express.com/sh...d.php?t=221818
                      Econowave and Audio Nirvana AN10 fullrange http://techtalk.parts-express.com/sh...d.php?t=216841
                      Imperial Russian Stouts http://techtalk.parts-express.com/sh...=1#post1840444
                      LECBOS. http://techtalk.parts-express.com/sh...ghlight=lecbos

                      Comment


                      • Re: My RS180 MTM Design

                        Originally posted by Wushuliu View Post
                        Tweeters outside (as seen in first post) or inside?
                        I really doesn't matter. Offset tweeters help with diffraction control; that it makes a difference in imaging is motly a myth. For placement you can choose. I have placed speakers both ways at different times.
                        Click here for Jeff Bagby's Loudspeaker Design Software

                        Comment


                        • Re: My RS180 MTM Design

                          Originally posted by Jeff B. View Post
                          I really doesn't matter. Offset tweeters help with diffraction control; that it makes a difference in imaging is motly a myth. For placement you can choose. I have placed speakers both ways at different times.
                          Thanks...

                          Comment


                          • Re: My RS180 MTM Design

                            So I have the MTM up and running but one question: For the 50uf I used 2x24uf for a day until I got dug through my bin enough to scrounge up a proper 50uf (1x30uf, 2x10uf). When I swapped in the 50, the sound got kind of dull, flat compared to the 48uf. Unfortunately my DMM has 20uf max so I can't verify exact capacitance so maybe one set is way over/under. I much prefer the 48uf. What part of the xo is this affecting?

                            Comment


                            • Re: My RS180 MTM Design

                              Originally posted by Wushuliu View Post
                              So I have the MTM up and running but one question: For the 50uf I used 2x24uf for a day until I got dug through my bin enough to scrounge up a proper 50uf (1x30uf, 2x10uf). When I swapped in the 50, the sound got kind of dull, flat compared to the 48uf. Unfortunately my DMM has 20uf max so I can't verify exact capacitance so maybe one set is way over/under. I much prefer the 48uf. What part of the xo is this affecting?

                              Stick with what sounds best to you. There really isn't much difference between 48 and 50 uf anyway. This cap is giving a little more tweeter protection and helping to shape the response at the roll-off, but the difference between these two values isn't enough to make a real difference.
                              Click here for Jeff Bagby's Loudspeaker Design Software

                              Comment


                              • Re: My RS180 MTM Design

                                Originally posted by Jeff B. View Post
                                Stick with what sounds best to you. There really isn't much difference between 48 and 50 uf anyway. This cap is giving a little more tweeter protection and helping to shape the response at the roll-off, but the difference between these two values isn't enough to make a real difference.
                                Thanks as always for the quick response.

                                Comment

                                Working...
                                X