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ZX Spectrum: HiVi M6A + BG Neo3 PDRW

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  • #16
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    There are a few possbilities, there: that the rendering for those files naturally smooths things by 1/24th or 1/12th octave, which would effectively eliminate those spikes (unsmoothed FR/phase look a lot like that) - or there's some logarithmic nastiness going on ..
    I am trolling you.

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    • #17
      Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

      Paul: I'm very intrigued. What is the sensitivity on these?

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      • #18
        Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

        Can you get the sensitivity just by looking at the response graph? i.e. if the response falls within 80 and 85db for the most part, is that also the sensitivity?

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        • #19
          Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

          Originally posted by Paul Carmody View Post
          I added the FR graph.
          It's crossed just shy of 2000 Hz. Don't try this at home, kids. :rolleyes:
          I am really admiring at the simplicity of the crossover.
          Humm, I wonder how would Klipsch 6.5 buyout would sound in this arrangement with minor modification of the XO. PE says K 6.5 has the same sensitivity as this HIVi driver.

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          • #20
            Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

            Paul,

            One question about the 8 ohm series resistor in the tweeter high pass. If I reduce the reistance to 6 or 4 ohms, would the slope of the high pass change?

            Thanks in advance

            Comment


            • #21
              Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

              Originally posted by ligs View Post
              Paul,

              One question about the 8 ohm series resistor in the tweeter high pass. If I reduce the reistance to 6 or 4 ohms, would the slope of the high pass change?

              Thanks in advance
              Nope. In that position, all it would do is change the attenuation or level of the output the driver yields in comparison to the midbass. All resistors do is attenuate or damp in a selective application. You can't change the slope with a resistor alone.

              Later,
              Wolf
              "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
              "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
              "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
              "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

              *InDIYana event website*

              Photobucket pages:
              https://app.photobucket.com/u/wolf_teeth_speaker

              My blog/writeups/thoughts here at PE:
              http://techtalk.parts-express.com/blog.php?u=4102

              Comment


              • #22
                Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                Originally posted by Filius View Post
                Can you get the sensitivity just by looking at the response graph? i.e. if the response falls within 80 and 85db for the most part, is that also the sensitivity?
                Yeah, that sounds about right. I'd say the sensitivity of these is about 83-84 dB--which is pretty much par for a 2-way with a 7" woofer with "full Baffle Step Compensation."
                Isn't it about time we started answering rhetorical questions?

                Paul Carmody's DIY Audio Projects
                Twitter: @undefinition1

                Comment


                • #23
                  Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                  Originally posted by ligs View Post
                  I am really admiring at the simplicity of the crossover.
                  Humm, I wonder how would Klipsch 6.5 buyout would sound in this arrangement with minor modification of the XO. PE says K 6.5 has the same sensitivity as this HIVi driver.
                  The crossover is reliant on a lot more than just the sensitivity of the driver. Because it's a metal-cone driver, there is a notch filter that targets the cone breakup. I'm also very careful on how I shape the midrange response of the 7" 2-ways. So I wouldn't do a version with the Klipsch buyout unless I heard it in person.
                  If you want to try it and tweak that's fine, but it's no longer my design. ;)
                  Isn't it about time we started answering rhetorical questions?

                  Paul Carmody's DIY Audio Projects
                  Twitter: @undefinition1

                  Comment


                  • #24
                    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                    Big soundstage and good imaging and all that? I assume so, but you don't say so specifically in either of your write-ups, as you do for other designs.

                    Sorry to pepper you with questions, just trying to decide on my next build and these look interesting. I want to make the right decision since I probably won't be doing another for quite a while. But no pressure!! ;)

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                    • #25
                      Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                      Originally posted by Wolf View Post
                      Nope. In that position, all it would do is change the attenuation or level of the output the driver yields in comparison to the midbass. All resistors do is attenuate or damp in a selective application. You can't change the slope with a resistor alone.

                      Later,
                      Wolf
                      Thanks for the answer. What about putting the resistor immediately before the tweeter? Would that change the slope of rolloff?

                      Comment


                      • #26
                        Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                        Originally posted by Paul Carmody View Post
                        The crossover is reliant on a lot more than just the sensitivity of the driver. Because it's a metal-cone driver, there is a notch filter that targets the cone breakup. I'm also very careful on how I shape the midrange response of the 7" 2-ways. So I wouldn't do a version with the Klipsch buyout unless I heard it in person.
                        If you want to try it and tweak that's fine, but it's no longer my design. ;)
                        Would you be interested in doing a Klipsch buyout version if I send you a pair of K-6.5 woofers at my expense?

                        Comment


                        • #27
                          Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                          Originally posted by ligs View Post
                          Would you be interested in doing a Klipsch buyout version if I send you a pair of K-6.5 woofers at my expense?
                          It'd be no problem, normally. However, I don't know if I have any baffles that would suit it. (and it's REALLY hard to get woodworking time with a baby in the house)

                          Do you have the T/S parameters for the woofer? I'll look and see if it fits into something I have.
                          Isn't it about time we started answering rhetorical questions?

                          Paul Carmody's DIY Audio Projects
                          Twitter: @undefinition1

                          Comment


                          • #28
                            Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                            Originally posted by ligs View Post
                            Thanks for the answer. What about putting the resistor immediately before the tweeter? Would that change the slope of rolloff?
                            No. Resistors do not change the slope/rolloff, but can change damping at the knee of the rolloff.
                            Later,
                            Wolf
                            "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                            "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                            "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                            "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                            *InDIYana event website*

                            Photobucket pages:
                            https://app.photobucket.com/u/wolf_teeth_speaker

                            My blog/writeups/thoughts here at PE:
                            http://techtalk.parts-express.com/blog.php?u=4102

                            Comment


                            • #29
                              Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                              Originally posted by Paul Carmody View Post
                              Yes, for all intents and purposes, you have the trademark on that one. I just had to do it this time to fit the theme. I thought of you when I did it.

                              And now I'm gonna try real hard not to name my speakers after ancient computers anymore. :o
                              Aw, no "Timex Sinclair" forthcoming? My first personal computer... I suppose you could call it that.

                              10 print "Hello World"
                              20 goto 10

                              Comment


                              • #30
                                Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

                                Originally posted by Paul Carmody View Post
                                It'd be no problem, normally. However, I don't know if I have any baffles that would suit it. (and it's REALLY hard to get woodworking time with a baby in the house)

                                Do you have the T/S parameters for the woofer? I'll look and see if it fits into something I have.
                                John has tested this particular Klipsch 6.5 buyout driver in his blog. Look at Oct 31's entry in

                                http://www.zaphaudio.com/blog.html

                                And there has been a lot of discussion in Tech Talk on this driver.

                                http://techtalk.parts-express.com/sh...d.php?t=219912


                                I borrowed your high pass XO with a simple LC 2nd order electrical(1.8 mh, 15 uf and a tank of 0.68 uf--3 ohm across the 1.8 mH 14 AWG air core) to the K-6.5 woofer. The system sounds very smooth and quite polite and may need less attenuation to the tweeter? I can not find any irrating quality at all.

                                Let me know if and when you can go ahead with the design and I can act accordingly.


                                Thank You.

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