Announcement

Collapse
No announcement yet.

MiniByzy (Mini Byzantium) Build Thread

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #91
    Re: MiniByzy (Mini Byzantium) Build Thread

    Ed is applying a few layers of CAE VB1x to the aluminum backed rubber that was applied to the walls. PE part number 268-256. Here's the first coat sitting and waiting to dry.
    Did the similar: epoxy coated (insides though + corner fillets), damping layer, 2" baffles. You will be very happy with the result. Small/Med cabinets built this way are a non-factor IME.

    Comment


    • #92
      Re: MiniByzy (Mini Byzantium) Build Thread

      How are the outer baffles going to be covered (paint, leather, veneer, etc...)?
      I just was trying to get an idea of what it was going to look like.
      Btw, they look awesome already.
      Thanks ,
      JB

      Comment


      • #93
        Re: MiniByzy (Mini Byzantium) Build Thread

        Originally posted by DjDisturbed View Post
        How are the outer baffles going to be covered (paint, leather, veneer, etc...)?
        I just was trying to get an idea of what it was going to look like.
        Btw, they look awesome already.
        Ed's going to paint this particular set of baffles, and the cabinet veneered by DoubleTap. In a future version, he's going to build the outer baffle/WG from a piece of hardwood, curly narra, with the disc created from the woofer cutout, with the enclosure painted piano gloss black. And it's funny you mention leather . . . that's an option Ed and I have discussed for a year now.
        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


        • #94
          Re: MiniByzy (Mini Byzantium) Build Thread

          Waveguides cut, and baffles readied for paint.



          Inner baffle epoxy sealed.

          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


          • #95
            Re: MiniByzy (Mini Byzantium) Build Thread

            did he cut the wave guide profile by hand?
            Reason I asked is because I've ordered custom rosette cutter knifes that can be used in a large drill press with a designated head. Something to think about if this is going to be repeated.
            Also, Pete, how does mounting the woofer behind the baffle with a bit of a round over like you have here, affect the FR? Do you have surface mounted vs rear mounted as shown here by any chance?
            Thanks, R.
            http://www.diy-ny.com/

            Comment


            • #96
              Re: MiniByzy (Mini Byzantium) Build Thread

              Originally posted by r-carpenter View Post
              did he cut the wave guide profile by hand?
              Reason I asked is because I've ordered custom rosette cutter knifes that can be used in a large drill press with a designated head. Something to think about if this is going to be repeated.
              Also, Pete, how does mounting the woofer behind the baffle with a bit of a round over like you have here, affect the FR? Do you have surface mounted vs rear mounted as shown here by any chance?
              Thanks, R.
              He used a machine called a RadarCarve. Basically, a router on an arm that is controlled by a stylus you use to follow a pattern, in this case, a waveguide. It can be used to duplicate objects, like guitar patterns and such.

              There's likely to be some FR variance due to the rear mounted woofer. I'm hoping it takes place in the stop band for the most part, based on the geometry of the configuration. Target is a 1KHz XO point, maybe just a tad lower, but not much, and thats about where you'd expect the woofer to begin beaming. The lower frequencies, which might "see" the rounded edge, will be quite a bit longer than the dimensions of that roundover. But that's all guesses on my part.

              Problem is, I don't have the parts yet to take the measurements. Ed's building this in Detroit, and then sending it here to St. Louis for Ryan and I to finish. I dropped him the woofers to make sure he got a perfect fit. If we find we need to modify the baffle to fix a glaring problem, then you can bet we will. But I've got high hopes for this. ;)
              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


              • #97
                Re: MiniByzy (Mini Byzantium) Build Thread

                I had my Seas W22EX mounted fairly similarly, and the measured FR below 1000hz was for all intent identical to being flush mounted ... so I'm not worried about it at all.
                Vapor Audio

                Comment


                • #98
                  Re: MiniByzy (Mini Byzantium) Build Thread

                  I've been told by Ed that the paint of choice is going to be a dark gray with metal flake, the same color as his truck.

                  Dark gray with metal flake . . . ties in real nice with the look of that Vifa cone.
                  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


                  • #99
                    Re: MiniByzy (Mini Byzantium) Build Thread

                    I hope it's REAL dark grey, or else it limits veneer options that's work with it.
                    Vapor Audio

                    Comment


                    • Re: MiniByzy (Mini Byzantium) Build Thread

                      Originally posted by DoubleTap View Post
                      I hope it's REAL dark grey, or else it limits veneer options that's work with it.
                      Ed says it's almost black. Paint color is carbon metallic.
                      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

                        Ready for the epoxy seal coat.

                        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

                          Has anyone here tried to clamp drivers in place to reduce mechanical coupling to the cabs? How effective was it?
                          The Past is history. The Future is a mystery. Today is a gift; that's why its called the Present. (Grand Master Oogway, Kung Fu Panda)

                          Comment


                          • Re: MiniByzy (Mini Byzantium) Build Thread

                            Originally posted by D, Rose View Post
                            Has anyone here tried to clamp drivers in place to reduce mechanical coupling to the cabs? How effective was it?
                            Yes, I've done several. Not sure if it really made much difference. From my experience so far any material that will hold the speaker in place has to be solid enough that it allows vibrations to get threw. To truly decouple them I've only found a couple of materials that will work. One is a thick layer of silicone. I'm working on a sub structure to mount the woofers to that I'm trying to suspend from the cabinet. So far I have one that seems to be working pretty well just haven't' had time to work on it lately with my ski season if full swing.

                            Here is a pic of one that I clamped in place with a rubber gasket to the baffle and rubber between the clamps. Not the best pic but the only one I can find that shows it.



                            Here is a pic that shows a constraint layer between the front and rear baffles. The clamp screws are only into the inner baffle. If you can find a flexible enough material to put between the driver and the baffle it would work pretty well. The rubber seems to transfer to much vibration. Something flexible like an 1/8 layer of silicone or a soft flexible rubber would work well.



                            Hope that gives you some ideas.
                            Dave
                            http://www.pellegreneacoustics.com/

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

                            Comment


                            • Re: MiniByzy (Mini Byzantium) Build Thread

                              Thanks Dave! I bet we could come up with something!
                              The Past is history. The Future is a mystery. Today is a gift; that's why its called the Present. (Grand Master Oogway, Kung Fu Panda)

                              Comment


                              • Re: MiniByzy (Mini Byzantium) Build Thread

                                Originally posted by D, Rose View Post
                                Thanks Dave! I bet we could come up with something!
                                I'm sure we can. What I've found is the woofers need to be mounted to something solid for the energy to transfer to and dissipate from. Otherwise the energy stays in the driver frame. So that is were I came up with a sub structure to dissipate the energy and it is easier to decouple from the baffle then a driver. I'll send you picks when I take some. I'm also working on some very solid light weight cabinets that I think are going to help dissipate energy. I've done some sample pieces and have one cab almost built.

                                If nothing it's a lot of fun learning.

                                Dave
                                http://www.pellegreneacoustics.com/

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

                                Comment

                                Working...
                                X