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"Into The Abyss", Tweeters in low places

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  • #61
    Click image for larger version

Name:	P2.jpg
Views:	453
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ID:	1381292 It turns out it's not a double surround, but a plastic ring built into the VC "carrier", Can't wait to hear them!
    Guess xmax's age.

    My guess: 15. His grammar is passable. His trolling is good.

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    • #62
      Good lord you weren't kidding! Those faceplates look enormous. That looks like it would rival a 5" driver just for mounting purposes! Is that all due to the chamber behind it? Still kinda hard to get a proper size perspective. Quite interested to read your impressions of them.
      Voxel Down Firing with Dayton SA70
      Translam Subwoofers - The Jedi Mind Tricks
      The Super Bees - Garage 2 way
      SevenSixTwo - InDIYana 2018 Coax
      The Defiants - InDIYana 2019 "Bare Minimum" Build

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      • #63
        Originally posted by KEtheredge87 View Post
        Good lord you weren't kidding! Those faceplates look enormous. That looks like it would rival a 5" driver just for mounting purposes! Is that all due to the chamber behind it? Still kinda hard to get a proper size perspective. Quite interested to read your impressions of them.
        The magnet is huge. A neo slug version would be welcome so that a smaller faceplate version could be obtained.
        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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        • #64
          Originally posted by Pete Schumacher View Post

          The magnet is huge. A neo slug version would be welcome so that a smaller faceplate version could be obtained.
          That would be great!
          Guess xmax's age.

          My guess: 15. His grammar is passable. His trolling is good.

          Comment


          • #65
            Removed
            Last edited by e6zion; 07-19-2018, 06:16 AM. Reason: Off topic

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            • #66
              Hello Xmax. Thank you for posting. If the opportunity presents itself, can you contrast the distortion of the da32 and da25 models? Also, can you post the impedance curve. It is my belief that the slight asymmetry of the da25's impedance curve is related to the transition from the pole vent to the chamber, and am curious whether this is the case with the da32. Good work. P.S. How do these look together?...

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              • #67
                Originally posted by olu78 View Post
                Hello Xmax. Thank you for posting. If the opportunity presents itself, can you contrast the distortion of the da32 and da25 models? Also, can you post the impedance curve. It is my belief that the slight asymmetry of the da25's impedance curve is related to the transition from the pole vent to the chamber, and am curious whether this is the case with the da32. Good work. P.S. How do these look together?...
                Those look great! Yes I will measure both, been trying to get to them all day!
                Guess xmax's age.

                My guess: 15. His grammar is passable. His trolling is good.

                Comment


                • #68
                  Preliminary measurements: What you are looking at is the 25 vs 32 (only the 25 is specified) filtered at 1.8K
                  and 1.4K active LR4 @ my normal mic gain settings and the same output to achieve around 103 dB @ 6" on a 19"X19" counter sunk
                  test baffle. Click image for larger version  Name:	PEER 1.4K.jpg Views:	1 Size:	376.9 KB ID:	1381411Click image for larger version  Name:	PEER 1.8K.jpg Views:	1 Size:	368.9 KB ID:	1381412
                  Guess xmax's age.

                  My guess: 15. His grammar is passable. His trolling is good.

                  Comment


                  • #69
                    Those both look pretty excellent to me! Are those in waveguides?

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                    • #70
                      Nope flush mounted in a 19"X19" baffle. I will be putting the 32mm versions in some boxes with the 9.5" Satori in the AM.
                      Guess xmax's age.

                      My guess: 15. His grammar is passable. His trolling is good.

                      Comment


                      • #71
                        Originally posted by xmax View Post
                        Preliminary measurements: What you are looking at is the 25 vs 32 (only the 25 is specified) filtered at 1.8K
                        and 1.4K active LR4 @ my normal mic gain settings and the same output to achieve around 103 dB @ 6" on a 19"X19" counter sunk
                        test baffle.
                        Those are measuring impressively flat! Can you shed light on the distortion measurements from 10K - 20K? Not sure I understand what is going on with the sharp rise in measured distortion from -75dB up to -35dB. Thanks for posting data!

                        Voxel Down Firing with Dayton SA70
                        Translam Subwoofers - The Jedi Mind Tricks
                        The Super Bees - Garage 2 way
                        SevenSixTwo - InDIYana 2018 Coax
                        The Defiants - InDIYana 2019 "Bare Minimum" Build

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                        • #72
                          It's breakup of the metal diaphragm, also represented by the 3rd order bump at 8-9kHz. 2nd order distortion of 15kHz is...30kHz, so I think you can determine how important that is.

                          I think its impressive to see a 32mm metal dome with breakup node above 20kHz, in fact barely lower than the 25mm model. I know several 25mm domes that don't achieve a breakup above 20kHz.
                          "I just use off the shelf textbook filters designed for a resistor of 8 ohms with
                          exactly a Fc 3K for both drivers, anybody can do it." -Xmax

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                          • #73
                            Originally posted by dcibel View Post
                            It's breakup of the metal diaphragm, also represented by the 3rd order bump at 8-9kHz. 2nd order distortion of 15kHz is...30kHz, so I think you can determine how important that is.

                            I think its impressive to see a 32mm metal dome with breakup node above 20kHz, in fact barely lower than the 25mm model. I know several 25mm domes that don't achieve a breakup above 20kHz.
                            Thanks dcibel! The breakup mode of the diaphragm occurred to me a little while after I asked the question. I tend to forget that tweeters have breakup modes too since they are occurring so high above 20Khz!
                            Voxel Down Firing with Dayton SA70
                            Translam Subwoofers - The Jedi Mind Tricks
                            The Super Bees - Garage 2 way
                            SevenSixTwo - InDIYana 2018 Coax
                            The Defiants - InDIYana 2019 "Bare Minimum" Build

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                            • #74
                              I am back on the project tomorrow, the lunatic minister at the church next to my shop dumped gasoline all over a playground
                              and the property to "kill weeds"!!!!! The fumes were so bad, the misses and I took off to a cabin for a few days...
                              Guess xmax's age.

                              My guess: 15. His grammar is passable. His trolling is good.

                              Comment


                              • #75
                                Originally posted by xmax View Post
                                I am back on the project tomorrow, the lunatic minister at the church next to my shop dumped gasoline all over a playground
                                and the property to "kill weeds"!!!!! The fumes were so bad, the misses and I took off to a cabin for a few days...
                                One... That's horrible!
                                Two... I totally conjured up an image of this guy throwing gasoline everywhere yelling "THE POWER OF CHRIST COMPELS YOU!!! THE POWER OF CHRIST COMPELS YOU!!!" for a solid a minute
                                Voxel Down Firing with Dayton SA70
                                Translam Subwoofers - The Jedi Mind Tricks
                                The Super Bees - Garage 2 way
                                SevenSixTwo - InDIYana 2018 Coax
                                The Defiants - InDIYana 2019 "Bare Minimum" Build

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