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10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

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  • 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Here are the photos of the raw goods as well as the proposed box and baffle design. Will begin the measurement process after making the boxes in next few days. I will test with flat baffle and final baffle will be saved for finished product. It will be interesting to see what effect the baffle has considering the use of the waveguide. I will also inlcude a link to Dave's testing of another N26C on his waveguide.

    https://plus.google.com/photos/10163...617?banner=pwa

    Click image for larger version

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  • #2
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Originally posted by buzzforb View Post
    Here are the photos of the raw goods as well as the proposed box and baffle design. Will begin the measurement process after making the boxes in next few days. I will test with flat baffle and final baffle will be saved for finished product. It will be interesting to see what effect the baffle has considering the use of the waveguide. I will also inlcude a link to Dave's testing of another N26C on his waveguide.

    https://plus.google.com/photos/10163...617?banner=pwa

    [ATTACH=CONFIG]43088[/ATTACH][ATTACH=CONFIG]43089[/ATTACH]
    Looks like the beginning of a great project.

    Dave
    http://www.pellegreneacoustics.com/

    Trench Seam Method for MDF
    https://picasaweb.google.com/101632266659473725850

    Comment


    • #3
      Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

      If the manufacturer's FR on that woofer is accurate, that is a really nice unit. That should be a very nice system. What kind of extension are you expecting from your MLTL?
      Loren Jones

      http://techtalk.parts-express.com/sh...-sound-drivers

      http://techtalk.parts-express.com/sh...for-live-sound

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      • #4
        Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

        Originally posted by davepellegrene View Post
        Looks like the beginning of a great project.

        Dave
        No kidding.

        In your opinion Dave, what's the lowest you'd cross that tweeter/guide combo?
        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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        • #5
          Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

          +1 on the above question...

          and to Buzzforb,

          Would love to hear more about what drew you to those two drivers, if you have any crossover target in mind, and how that fits into your own criteria for speaker design, and any thoughts on 8 vs 10 vs 12 woofers in a design like this. Also love to hear some more about the waveguide you went with and your take on the pros/cons vs other options. I guess what it boils down to is that I am encouraging you not to hold back here and tell us more about your goals and objectives that led up to this pairing.

          Very interested in this project and glad you started a thread on it.

          Comment


          • #6
            Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

            No kidding.

            In your opinion Dave, what's the lowest you'd cross that tweeter/guide combo?
            That guide gives boost down to around 1.6 kHz. I'm not sure what is different about the X version then the A version but I could run distortion on the N26C A and give you a pretty good idea. Unless buzz can run them himself and post with the x version.

            I'm wondering if a larger guide say 10" would boost down around 1 kHz and pair up real nice with the 10G40. Specs. Sure do look good.

            Dave
            http://www.pellegreneacoustics.com/

            Trench Seam Method for MDF
            https://picasaweb.google.com/101632266659473725850

            Comment


            • #7
              Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

              Originally posted by davepellegrene View Post
              That guide gives boost down to around 1.6 kHz. I'm not sure what is different about the X version then the A version but I could run distortion on the N26C A and give you a pretty good idea. Unless buzz can run them himself and post with the x version.

              I'm wondering if a larger guide say 10" would boost down around 1 kHz and pair up real nice with the 10G40. Specs. Sure do look good.

              Dave
              If you look at the posted response of the N26C/G, it cuts off on its own at 1500Hz. Basically what you're saying is that you see the guide doing its job all the way to the tweeter cutoff. I don't think a larger guide will gain you much other than a different pattern response. It won't go any lower than its natural roll off.

              That guide/tweeter would probably support a 1200Hz LR4 target, and according to the published data on the woofer, it could do the same. I'd like to see the project completed. It's got real chest pounding potential, if the tweeter can keep up.
              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: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                If you look at the posted response of the N26C/G, it cuts off on its own at 1500Hz. Basically what you're saying is that you see the guide doing its job all the way to the tweeter cutoff. I don't think a larger guide will gain you much other than a different pattern response. It won't go any lower than its natural roll off.

                That guide/tweeter would probably support a 1200Hz LR4 target, and according to the published data on the woofer, it could do the same. I'd like to see the project completed. It's got real chest pounding potential, if the tweeter can keep up.

                Looking at my flat baffle polar I figured it could get to 1.0 kHz
                Click image for larger version

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                Dave
                http://www.pellegreneacoustics.com/

                Trench Seam Method for MDF
                https://picasaweb.google.com/101632266659473725850

                Comment


                • #9
                  Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                  Here is the on axis response from Transducer Labs site on the A/G version
                  It looks like the natural roll off is 1.0 kHz

                  http://www.transducerlab.com/media/3...13ffffa126.pdf

                  Dave
                  http://www.pellegreneacoustics.com/

                  Trench Seam Method for MDF
                  https://picasaweb.google.com/101632266659473725850

                  Comment


                  • #10
                    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                    Originally posted by davepellegrene View Post
                    Here is the on axis response from Transducer Labs site on the A/G version
                    It looks like the natural roll off is 1.0 kHz

                    http://www.transducerlab.com/media/3...13ffffa126.pdf

                    Dave
                    That's the N26CR.

                    The C/G is here.

                    http://www.transducerlab.com/media/e...4effffa126.pdf
                    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


                    • #11
                      Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                      That's the N26CR.

                      The C/G is here.

                      http://www.transducerlab.com/media/e...4effffa126.pdf
                      Good catch!
                      My polar looks closer to the N26CR.
                      So I did a little research and here is the difference.
                      Taken from the website;
                      This is a limited edition version of the popular ceramic dome tweeter. This version has a different type of epoxy holding the dome assembly which gives the tweeter a 10% lower fs and a slightly lower SPL. There are 70 units available at this special price.


                      Dave
                      http://www.pellegreneacoustics.com/

                      Trench Seam Method for MDF
                      https://picasaweb.google.com/101632266659473725850

                      Comment


                      • #12
                        Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                        ]IT builds confidence to see the big dogs wandering around. Idea is largely the result of Pete's 8BG51 thread and my desire to build my brother a monitor/bookshelf that would go toe to toe with the likes of the JBL LS series and other high end monitors. He has a relatively small room so it is my hope that this woofer in a well executed TL cabinet will give us all the bass we want. The 10g40 has a pretty good reputation as a snappy woofer and that is what I am hoping for. Quick and punchy. THe TL labs N26C is probably what I am most excited about. Clean, well made tweeter with well regarded reputation and motor/design to back it up. All measurements seem to point to excellent performance and that is what I am expecting. The model I purchased gives up about 1dB of sensitivity for lower Fs. I got it because it was available. 1.2K x-over for the 10g40 should be no problem from what info I have. I am new to this level of design, so any help is appreciated. Got all the gear, but have to get everything setup. DSP will be used to rough xover points. I will be picking up Bagby's PCD and running with it to the best of my ablilties. I will post pics of test boxes by weekend if all goes as planned. Hopefully measurements follow soon after. Tweeters are very well matched so lets hope the woofers show a similar likeness. You fellows suggest running the woofers in with a test tone to break them in a bit for taking final TS parameters. IF they ar remotely close, should work fine in the box as it is pretty flexible. Questions to come.

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                        • #13
                          Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                          Any opinions on rear vs bottom port considering the tuning of this particular box. The speakers will be away from the wall about 3-4 feet, so rear port should not be a problem, but a bottom port might offer some tuning options if you make speaker spikes that allow LF tuning with speaker stand top.

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                          • #14
                            Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                            Little update. Got the boxes put together for the woofers. Didnt get to the tweeter holes. Sounds good with a roughed out DSP crossover. Crossing at 1500. Beyma has absolutlely no problem going that high. Waiting on a UMIK-1 mic, as I wanted to try it over the Berhringer, especially considering the USB connectivity. Will try to get measurements next weekend. Bass is definitely not an issue and the tweeters are clean and crisp. Cant tell too much at this point, but hopefully it will progress quickly.
                            Attached Files

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                            • #15
                              Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

                              Originally posted by buzzforb View Post
                              Little update. Got the boxes put together for the woofers. Didnt get to the tweeter holes. Sounds good with a roughed out DSP crossover. Crossing at 1500. Beyma has absolutlely no problem going that high. Waiting on a UMIK-1 mic, as I wanted to try it over the Berhringer, especially considering the USB connectivity. Will try to get measurements next weekend. Bass is definitely not an issue and the tweeters are clean and crisp. Cant tell too much at this point, but hopefully it will progress quickly.
                              Are you making a baffle to go over the enclosure and cover that woofer flange or is the baffle to be cut away along those facet lines?
                              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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