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MiniByzy (Mini Byzantium) Build Thread

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  • Re: MiniByzy (Mini Byzantium) Build Thread

    Finally! We got the veneered cabinets done. Looking good too.

    As Ed said in a recent email . . . It was a good build.

    I'll post response plots soon for the current XO and RS28F implementation. I still want to evaluate the RS28A, because it really sounded nice in Chicago.

    What's up next? Maybe a two-way using Ed's waveguide baffle and the RS225?



    Last edited by Pete Schumacher; 11-05-2011, 11:41 PM.
    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


    • Re: MiniByzy (Mini Byzantium) Build Thread

      Pretty!
      "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

      http://www.diy-ny.com/

      Comment


      • Re: MiniByzy (Mini Byzantium) Build Thread

        Originally posted by greywarden View Post
        I'm pretty sure I've seen magnesium tweeters. The SEAS W-model woofers are Magnesium-coned.
        Seas T29 'Magnum'. I recall seeing at least one other model, and I can't think of it currently.

        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

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        • Re: MiniByzy (Mini Byzantium) Build Thread

          Those are gorgeous Pete! :eek:

          I'm sorry I didn't get a chance to hear them.

          Jim

          Comment


          • Re: MiniByzy (Mini Byzantium) Build Thread

            The level of craftsmanship on all sides of these cabinets is incredibly impressive. I can't help but think though, that will all the work in the finishing that there has to be a way to 'hide' those mounting screws on the front baffle. It just seems a bit like owning a Lamborghini and driving it to Monte Carlo on a donut spare tire.

            Please understand, I don't mean that to sound as negative as it likely does. It's just those cabinets are so stunning, and then there are bolts on the face that just seem so... out of place. I guess I just don't have the words to articulate it right now.

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            • Re: MiniByzy (Mini Byzantium) Build Thread

              Originally posted by jcpahman77 View Post
              The level of craftsmanship on all sides of these cabinets is incredibly impressive. I can't help but think though, that will all the work in the finishing that there has to be a way to 'hide' those mounting screws on the front baffle. It just seems a bit like owning a Lamborghini and driving it to Monte Carlo on a donut spare tire.

              Please understand, I don't mean that to sound as negative as it likely does. It's just those cabinets are so stunning, and then there are bolts on the face that just seem so... out of place. I guess I just don't have the words to articulate it right now.
              With the drivers mounted behind the front baffle, there's almost no way out of having something there to hold it on, either from the front, or back. We thought about some kind of mechanism that would grab the baffle and pull it tight against the enclosure, but anything else is just too complicated. We could try something like making the bottom removable, and attach the outer baffle from the inside of the enclosure, but that would entail a rethink of the whole assembly since the base is integral to creating the upper part of the enclosure.

              But you did just give me an idea that I'll have to pass along to Ed . . .
              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


              • Re: MiniByzy (Mini Byzantium) Build Thread

                Originally posted by Jim Holtz View Post
                Those are gorgeous Pete! :eek:

                I'm sorry I didn't get a chance to hear them.

                Jim
                I'll bring a set to Iowa next year.

                And perhaps a "high end" version in the same cabinet using some exotic drivers.
                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


                • Re: MiniByzy (Mini Byzantium) Build Thread

                  Can you put some spaces in between those pictures? lol, it's impossible to read even on my 1600px wide screen, lol

                  रेतुर्न तो थे स्रोत
                  return to the source
                  leviathan system thread
                  deadhorse thread
                  shockwave build thread

                  instagram :: greywarden_13

                  in war, victory . . . in peace, vigilance . . . in death, sacrifice.

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                  • Re: MiniByzy (Mini Byzantium) Build Thread

                    Originally posted by greywarden View Post
                    Can you put some spaces in between those pictures? lol, it's impossible to read even on my 1600px wide screen, lol
                    fixed . . . ;)
                    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


                    • Re: MiniByzy (Mini Byzantium) Build Thread

                      With the drivers mounted behind the front baffle, there's almost no way out of having something there to hold it on, either from the front, or back. We thought about some kind of mechanism that would grab the baffle and pull it tight against the enclosure, but anything else is just too complicated. We could try something like making the bottom removable, and attach the outer baffle from the inside of the enclosure, but that would entail a rethink of the whole assembly since the base is integral to creating the upper part of the enclosure.

                      But you did just give me an idea that I'll have to pass along to Ed . . .
                      I'm aware of the construction and the limitations inherent in the design employed here. Ordinarily I won't 'criticize' someone's product without offering some sort of input as to how to 'correct' it. I'm having a hard time talking negatively about these at all because they do look so stunning, but I figured those that made the cabinets are so far above my level in woodworking, perhaps suggesting something could be done would be enough. It seems a bit like it may have worked if you have an idea to pass along to Ed. These still get an 10 out of 10 as far as I'm concerned.

                      Comment


                      • Re: MiniByzy (Mini Byzantium) Build Thread

                        Originally posted by jcpahman77 View Post
                        These still get an 10 out of 10 as far as I'm concerned.
                        Well, let's just see if we can't make it go to eleven . . . :D


                        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


                        • Re: MiniByzy (Mini Byzantium) Build Thread

                          After appreciating them in person,10 of 10 is a fair assessment,Imho.
                          Less is only more where more is no good.
                          -Frank Lloyd Wright

                          :D

                          Comment


                          • Re: MiniByzy (Mini Byzantium) Build Thread

                            Finally! We got the veneered cabinets done. Looking good too.

                            As Ed said in a recent email . . . It was a good build.

                            I'll post response plots soon for the current XO and RS28F implementation. I still want to evaluate the RS28A, because it really sounded nice in Chicago.

                            What's up next? Maybe a two-way using Ed's waveguide baffle and the RS225?
                            Beautiful, Pete. A nice looking speaker should sound about 10% better than an ugly one. In this case you might be approaching the theoretical limit of 25%. :D

                            It looks like the outer perimeter of the waveguide is slightly truncated at the bottom (adjoins the woofer cutout) and also upper right and upper left (cab edge), or is it just the photos? Even if it is, maybe it does not matter because you are into the outer portion that matches the baffle to the waveguide proper, and because any truncation is so slight?

                            John

                            Comment


                            • Re: MiniByzy (Mini Byzantium) Build Thread

                              Originally posted by OlderMongrel View Post
                              Beautiful, Pete. A nice looking speaker should sound about 10% better than an ugly one. In this case you might be approaching the theoretical limit of 25%. :D
                              John
                              Like putting that Flowmaster sticker on my car gives me 5 more horsepower? lol

                              Comment


                              • Re: MiniByzy (Mini Byzantium) Build Thread

                                Originally posted by OlderMongrel View Post
                                Beautiful, Pete. A nice looking speaker should sound about 10% better than an ugly one. In this case you might be approaching the theoretical limit of 25%. :D

                                It looks like the outer perimeter of the waveguide is slightly truncated at the bottom (adjoins the woofer cutout) and also upper right and upper left (cab edge), or is it just the photos? Even if it is, maybe it does not matter because you are into the outer portion that matches the baffle to the waveguide proper, and because any truncation is so slight?

                                John
                                Thanks! I'm sure Ed will be quite pleased to read your assessment of his cabinetry and his painter's finish.

                                You're very observant about the waveguide being truncated. It's at the very outer edges, leaving at least 90% of the waveguide still operating to control the tweeter directivity. From the measurements we got, it is only slightly changed from the full waveguide on a 2'x4' baffle. And baffle diffraction effects are hugely reduced if not eliminated in the tweeter passband. That diffraction control, and the totally dead cabinet made by Ed, may have helped with what some observed as a rather large sound stage. Ryan (---k---) experiencing a feeling of actually being in a hall. When you can do that with point source monitors, you're doing something right. The OB guys say that's their proprietary territory . . . . :p

                                Since the above baffle was fashioned by Ed, we made a couple modifications to his waveguide milling jig resulting in an even more uniform guide than what you see pictured above. The baffles that showed up in Chicago were "almost" perfect, but having been painted white, were a little more forgiving of showing off what few imperfections were left. There just wasn't time to take care of the last 2% of the finish. Ed's getting that done this week.

                                I hope he can start making a few baffles for the gang soon. It doesn't take much extra elbow grease to take his milled MDF and make a very nice WG baffle.
                                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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