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  • Discuss ...

    http://www.decware.com/newsite/FRX.html
    Vapor Audio

  • #2
    Re: Discuss ...

    Originally posted by DoubleTap View Post
    Not sure why he had to use a transformer to create a current source to drive the voice coil. But I suppose you don't have to sell a custom amp to do the same thing that way.

    So, if he's dumping power into a dummy load, why not just do the same thing with a crossover?
    R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
    Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

    95% of Climate Models Agree: The Observations Must be Wrong
    "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

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    • #3
      Re: Discuss ...

      Not sure why he had to use a transformer to create a current source to drive the voice coil. But I suppose you don't have to sell a custom amp to do the same thing that way.

      So, if he's dumping power into a dummy load, why not just do the same thing with a crossover?
      That was my thought too, since every speaker is an electromagnet already, I'm not sure what he's trying to say with his marketing.

      And I'd bet anything that published FR graph is a load of you know what.
      Vapor Audio

      Comment


      • #4
        Re: Discuss ...

        Originally posted by DoubleTap View Post
        That was my thought too, since every speaker is an electromagnet already, I'm not sure what he's trying to say with his marketing.

        And I'd bet anything that published FR graph is a load of you know what.
        Did you download one of the close mic'd recordings supposedly made from the driver itself?
        R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
        Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

        95% of Climate Models Agree: The Observations Must be Wrong
        "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

        Comment


        • #5
          Re: Discuss ...

          Did you download one of the close mic'd recordings supposedly made from the driver itself?
          Ha, no ... but I might try that downstairs.
          Vapor Audio

          Comment


          • #6
            Re: Discuss ...

            Just skimming through, I found the DNA Horn that uses the $112 Tang Band W5-1880 Fullrange. No harm in that, but he even uses the PE ad copy for it!:eek:

            http://www.decware.com/newsite/HORN.html


            And only charges $2300 for a pair.:D


            Mark
            You go your way, I'll go mine. I don't care if we get there on time.

            ~Pink Floyd

            Comment


            • #7
              Re: Discuss ...

              Originally posted by Mark65 View Post
              Just skimming through, I found the DNA Horn that uses the $112 Tang Band W5-1880 Fullrange. No harm in that, but he even uses the PE ad copy for it!:eek:

              http://www.decware.com/newsite/HORN.html


              And only charges $2300 for a pair.:D


              Mark
              I wonder how he gets that horn output to sum so nicely with the driver output to arrive at such a ruler flat response. :rolleyes:

              R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
              Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

              95% of Climate Models Agree: The Observations Must be Wrong
              "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

              Comment


              • #8
                Re: Discuss ...

                Originally posted by Mark65 View Post
                Just skimming through, I found the DNA Horn that uses the $112 Tang Band W5-1880 Fullrange. No harm in that, but he even uses the PE ad copy for it!:eek:

                http://www.decware.com/newsite/HORN.html


                And only charges $2300 for a pair.:D
                If I had the same margin, my Cirrus would be about $18,000/pair :eek:
                Vapor Audio

                Comment


                • #9
                  Re: Discuss ...

                  Originally posted by DoubleTap View Post
                  If I had the same margin, my Cirrus would be about $18,000/pair :eek:

                  :D:D:eek::D:D
                  You go your way, I'll go mine. I don't care if we get there on time.

                  ~Pink Floyd

                  Comment


                  • #10
                    Re: Discuss ...

                    I'll take the one with the girl in it . . . it would free up some space in the closet . . . :rolleyes:
                    "It suggests that there is something that is happening in the real system that is not quite captured in the models."

                    Comment


                    • #11
                      Re: Discuss ...

                      There is quite a bit of discussion on the dnas over on diyaudio. Some of the posters were none too kind to them and what id posted on decwares website. I'm still trying to wrap my head around all of the horn theories, but I am having a very hard time believing a lot of the graphs from decware.

                      Funny too, I know in one of my books of drawings I have drawn a BLH very similar to the DNA:D Just haven't gotten around to actaully building it yet.
                      https://www.facebook.com/Mosaic-Audi...7373763888294/

                      Comment


                      • #12
                        Re: Discuss ...

                        How can a single driver, on an open baffle produce this without a filter? (Or is there a filter involved, and I missed it).



                        Where is the dipole peak? The -6 dB/oct roll-off below that?
                        Isn't it about time we started answering rhetorical questions?

                        Paul Carmody's DIY Audio Projects
                        Twitter: @undefinition1

                        Comment


                        • #13
                          Re: Discuss ...

                          Originally posted by Paul Carmody View Post
                          How can a single driver, on an open baffle produce this without a filter? (Or is there a filter involved, and I missed it).

                          Where is the dipole peak? The -6 dB/oct roll-off below that?
                          Nothing gets by you grasshopper.

                          It's probably buried inside the large coupling chamber that hosts the dummy load and transformer.

                          As for the flatness of response . . . well, that'll have to wait until my order arrives for confirmation.

                          Then again, we could look at Curt's singularity for a taste, could we not?



                          Sure looks similar eh? Just a redone surround perhaps?

                          R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                          Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                          95% of Climate Models Agree: The Observations Must be Wrong
                          "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                          Comment


                          • #14
                            Re: Discuss ...

                            With a transformer one can achieve something like "bass boost" WITHOUT throwing power into resistors. You see, you can tap into the output from the amp both before and after the transformer so you can essentially get your ~ 6 db BSC without wasting any power into resistors (of course, the wire will have some resistance...). [If you think I'm saying something that's incorrect here, I'm not, just think it through and you'll probably figure it out - I'm not implying that you are gaining efficiency]

                            You can also attach passive crossover components at different points along the transformer's wire. Many neat tricks can be done...
                            "...this is not a subwoofer" - Jeff Bagby ;)

                            Comment


                            • #15
                              Re: Discuss ...

                              Originally posted by critofur View Post
                              With a transformer one can achieve something like "bass boost" WITHOUT throwing power into resistors. You see, you can tap into the output from the amp both before and after the transformer so you can essentially get your ~ 6 db BSC without wasting any power into resistors (of course, the wire will have some resistance...). [If you think I'm saying something that's incorrect here, I'm not, just think it through and you'll probably figure it out - I'm not implying that you are gaining efficiency]

                              You can also attach passive crossover components at different points along the transformer's wire. Many neat tricks can be done...
                              You do that with an 8 Ohm speaker, and you'll drop the impedance presented to the amp to 2 Ohm.
                              R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                              Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                              95% of Climate Models Agree: The Observations Must be Wrong
                              "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                              Comment

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