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Next up in the shop: a LOUD, paper-cone 3 way

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  • Re: Next up in the shop: a LOUD, paper-cone 3 way

    Originally posted by Paul Carmody View Post
    I like the idea of a "rear-firing woofer," because it allows the front of the cabinet to be narrower. Verity does this with their designs, and they look quite elegant, in my opinion.
    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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    • Re: Next up in the shop: a LOUD, paper-cone 3 way

      Originally posted by Paul Carmody View Post
      2. Where's a good place to get raw veneer?
      Sorry, didn't notice this question ... my 2 favorite sites

      http://www.wood-veneers.com/
      http://www.certainlywood.com/
      Vapor Audio

      Comment


      • Re: Next up in the shop: a LOUD, paper-cone 3 way

        Originally posted by DoubleTap View Post
        Sorry, didn't notice this question ... my 2 favorite sites

        http://www.wood-veneers.com/
        http://www.certainlywood.com/
        you could spend HOURS just looking at all the veneer in that first link.

        :eek:

        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: Next up in the shop: a LOUD, paper-cone 3 way

          Forgive my ignorance, I could find nothing on the Trapezoidal sectioned MTM Mr. Schumacher showed us in Post # 106.

          Interesting looking speaker. I heard the small Von Schweikerts with the Fostex Mid's earlier this year, and was quite impressed. Are there any other sources besides Von Schweikerts web site with info on the above referenced speakers?

          I'm looking forward to seeing a completed build here, sorry about the garage crack, I honestly thought that's what these were for, MY Bad....

          Back to lurking now,
          John
          All statements include, at no charge, an Oklahoma Guarantee: Guaranteed not to Rip, Rap, Flip, Flap, Warp, Wrinkle, or Rust, for 30 Miles or 30 Seconds, if it breaks, YOU get to keep BOTH halves.

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          • Re: Next up in the shop: a LOUD, paper-cone 3 way

            Originally posted by mightym View Post
            Forgive my ignorance, I could find nothing on the Trapezoidal sectioned MTM Mr. Schumacher showed us in Post # 106.

            Interesting looking speaker. I heard the small Von Schweikerts with the Fostex Mid's earlier this year, and was quite impressed. Are there any other sources besides Von Schweikerts web site with info on the above referenced speakers?

            I'm looking forward to seeing a completed build here, sorry about the garage crack, I honestly thought that's what these were for, MY Bad....

            Back to lurking now,
            John
            That was a Von Schumacher design!!! ;) It just fit the description of narrow front with larger back for a woofer. That particular creation had an Adire Audio DPL12 on the bottom. Could have easily been mounted on back as well.
            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: Crossovers n' measurements

              First off, I have a name for these monsters! I call them Tarkus. For those uninitiated in prog rock, it's the name of an epic song by Emerson, Lake, and Palmer (which sounds quite good on these :D). Tarkus is a half-armadillo, half-tank creature. Seemed appropriate on many levels.

              Now, onto the crossover. Nothing too complicated. Mostly 2nd order electrical filters and L-pads all around. The mid has a notch filter (C4 + L3) at 4500 Hz, because the mid does have a bit of a breakup, and it's worth the few dollars in parts to get that hash out of the way when cranking these things to 11.







              The parts count has some wiggle room in it. What's shown is what I'd consider middle-of-the-road; nothing fancy, but no cut corners, either. I paralleled an electrolytic + poly cap on the mid circuit for [potential] sonic benefits, however there's no reason one couldn't use a single 65 uF cap instead. Likewise, the L-pads use the Dayton 10-watt non-inductive resistors in pairs, which brings the power handling up to 20 watts each (which should be enough). Someone could just as well use single 20+ watt wirewound resistors for the L-pads and it'd be fine.
              My total is $310; with the cheaper substitutions above, it was around $290. Of course, you can always shop around for components as well....
              Attached Files
              Isn't it about time we started answering rhetorical questions?

              Paul Carmody's DIY Audio Projects
              Twitter: @undefinition1

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              • Re: about the shape...

                In case anyone was wondering, the angled cabinets in this design are purely cosmetic. One could achieve the exact same-sounding speaker using rectangular enclosures, just as long as the interior volume of the cabinets is the same. (I have "square" drawings of them on my hard drive somewhere... )
                Isn't it about time we started answering rhetorical questions?

                Paul Carmody's DIY Audio Projects
                Twitter: @undefinition1

                Comment


                • Re: Next up in the shop: a LOUD, paper-cone 3 way

                  Ooooo, I like these. I have no reason to build a pair, but I really kind of what to. I guess I could put them in the living room. Or in the music room and move the music speakers to the living room, heh.

                  Actually I'll probably just push to get somebody I know to build a pair o have me help them build a pair so I can see and hear them. Either way, I like. Are these by chance what you're bringing to Iowa? *excited*

                  Comment


                  • Re: about the shape...

                    No, no! We likes the angles. Just another set of stacked boxes otherwise.:p

                    Originally posted by Paul Carmody View Post
                    In case anyone was wondering, the angled cabinets in this design are purely cosmetic. One could achieve the exact same-sounding speaker using rectangular enclosures, just as long as the interior volume of the cabinets is the same. (I have "square" drawings of them on my hard drive somewhere... )
                    I was so much older then, I'm younger than that now.
                    OS MTMs http://techtalk.parts-express.com/sh...d.php?t=220388
                    Swope TM http://techtalk.parts-express.com/sh...d.php?t=221818
                    Econowave and Audio Nirvana AN10 fullrange http://techtalk.parts-express.com/sh...d.php?t=216841
                    Imperial Russian Stouts http://techtalk.parts-express.com/sh...=1#post1840444
                    LECBOS. http://techtalk.parts-express.com/sh...ghlight=lecbos

                    Comment


                    • Re: Next up in the shop: a LOUD, paper-cone 3 way

                      Originally posted by DoubleTap View Post
                      Does that make sense? Obviously it's a bit hard to put into words but I think anybody proficient enough to build cabinets in the first place can figure it out once they get going. The process takes more time than contact cement, but I don't think is any harder ... and cold press is a better bond than contact cement.
                      Please forgive the hijack / side note to the thread for a moment; but I have to ask -- how you deal with glue squeeze out with this method?

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                      • Re: Next up in the shop: a LOUD, paper-cone 3 way

                        Hi,
                        I hope you don't mind me chime-ing in here but I learned a lot.
                        I love the crossover integration and the mix of woofer / mid slopes. thanks heaps Paul. cheers, Jack

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                        • Re: Next up in the shop: a LOUD, paper-cone 3 way

                          Use a bit less glue, and use blue painter's tape around the edges that aren't being worked. You don't need a huge amount of glue, at least not with the Titebond Cold Press.

                          Originally posted by kirk78h View Post
                          Please forgive the hijack / side note to the thread for a moment; but I have to ask -- how you deal with glue squeeze out with this method?
                          I was so much older then, I'm younger than that now.
                          OS MTMs http://techtalk.parts-express.com/sh...d.php?t=220388
                          Swope TM http://techtalk.parts-express.com/sh...d.php?t=221818
                          Econowave and Audio Nirvana AN10 fullrange http://techtalk.parts-express.com/sh...d.php?t=216841
                          Imperial Russian Stouts http://techtalk.parts-express.com/sh...=1#post1840444
                          LECBOS. http://techtalk.parts-express.com/sh...ghlight=lecbos

                          Comment


                          • Re: Next up in the shop: a LOUD, paper-cone 3 way

                            I don't see a picture with the grill off. How do you know?
                            http://hexaudio.blogspot.com/

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                            • Re: Next up in the shop: a LOUD, paper-cone 3 way

                              Originally posted by kirk78h View Post
                              Please forgive the hijack / side note to the thread for a moment; but I have to ask -- how you deal with glue squeeze out with this method?
                              If you apply the glue with a roller you're not going to have any, or very little squeezed out. And even if some does it's nothing to worry about, just sand it off or shave it off with a razor blade.
                              Vapor Audio

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