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"Effervescents" Build Thread

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  • "Effervescents" Build Thread

    Now that my ski season is over I can finally get back on these.
    A while back I made up a bunch of samples of cabinet panels out of difference materials to try to come up with a light weight panel for my next three way build. I ended up using a 1" thick panel made up of an inner layer of 1/4" hardi backer cement board, a viscoelastic layer of mystery glop, http://meniscusaudio.com/mystery-glop-p-909.html, a 1/2" thick layer of thermax sheeting, a layer of silicone then the outer layer of 1/4" cherry plywood. I think this will lighten the cabinets up my about 20lbs. I hope so at least. The mystery goop has a consistency of jello and is very sticky. I found heating it up will liquify it so it can be applied with a roller or brush. Scary stuff when heated. I can't even imagine spilling on myself.
    I made the tweeter/ mid in a sealed cabinet that is removable from the base cabinet. Making the tweeter/mid box removable was the best way to lighten up the cabinet. I have it sitting on the base box with spikes with cups set into the top of the base cabinet so they have a space of a 1/4" between them.
    I molded a waveguide to fit around the mid and I also rear mounted the mid and down sized the opening so the surround is hidden. This allowed me room to get a double bevel on the baffle edge. With all my waveguide testing I found a 30 degree bevel going into a 60 degree bevel works really well for diffraction.
    The base section will have two 8" buyout woofers mounted in a folded tapered line designed by Paul K. The line tapers both directions as it exits out base box at the top. The woofers are sandwiched in a frame suspended by silicone. The front baffle and rear panel will be attached by sandwiching the box with four PVC pipes running through the box. The pvc pipe screws to the front baffle, runs through the cabinet and the rear panel will have screws running through it into the pvc pipe holding it on. I've got four 1/4" dowel rods mounted in the baffle that go into the front edge of the box to hold it aligned.
    The mid is going to be the SEAS Prestige ER18RNX (H1456) 7" Reed Paper Cone Woofer in a sealed box.
    The tweeter is going to be the CSS LD25X.
    I've been thinking about going active on the woofers. I have two Dayton Audio SPA250 250 Watt Subwoofer Plate Amplifier that I could use as long as I can modify them to cross around 350Hz.

    Here is a link to my build picks. Way to many to post here. I put captions on the pics to help explain what I'm doing.
    https://picasaweb.google.com/pelegrn...LX7gPH1-7TzVg#

    Here is a pic where I'm at so far.



    Dave
    Last edited by davepellegrene; 01-06-2014, 09:49 PM.
    http://www.pellegreneacoustics.com/

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

  • #2
    Re: "Effervescents" Build Thread

    WOW.:eek::eek:

    That is stunning.

    Awesome work as usual, Dave!


    Mark
    You go your way, I'll go mine. I don't care if we get there on time.

    ~Pink Floyd

    Comment


    • #3
      Re: "Effervescents" Build Thread

      That is some amazing cabinet work Dave, nice job!
      Audio: Media PC -> Sabre ESS 9023 DAC -> Behringer EP2500 -> (insert speakers of the moment)
      Sites: Jupiter Audioworks - Flicker Stream - Proud Member of Midwest Audio Club

      Comment


      • #4
        Re: "Effervescents" Build Thread

        wow dave, your really steping up with this one.
        " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

        Quote Originally Posted by hongrn. Oct 2014
        Do you realize that being an American is like winning the biggest jackpot ever??

        http://www.midwestaudioclub.com/spot...owell-simpson/
        http://s413.photobucket.com/albums/pp216/arlis/

        Comment


        • #5
          Re: "Effervescents" Build Thread

          http://s23.photobucket.com/albums/b3...rent=Build.mp4

          Comment


          • #6
            Re: "Effervescents" Build Thread

            Whoa ! Excuse me while I pick my jaw up off the floor.

            Comment


            • #7
              Re: "Effervescents" Build Thread

              Suddenly, I'm starting to wonder if you are going to go head to head against Wilson Audio and their "X" material... that looks incredible!
              Line Array: IDS-25 Clone, FE-83.
              2-2.5 Way:
              Zaph Audio's winning entry: ZA5+SB29. - Microliths: RS125+RS28. - Small Bangs: TB W4-1658SB+SEAS 27TBFC/G. - Monoliths: Peerless 830884+SEAS 27TBFC/G.
              3-3.5 Way:Miniliths: SEAS P21/CA21REX+Neo8 PDR+Neo3 PDR. - Megaliths: 2xDayton RS270+2xT-B W4-1337SB+SB29. - ZDT3.5 +: 2xDayton RS180+Dayton RS52+Vifa DQ25. Reflexos: OB 4xDayton RS150 + Neo3 PDR.

              Comment


              • #8
                Re: "Effervescents" Build Thread

                Thanks Guys, especially Eric.
                I cut the parts for the second one along with the first one and stacked them on a shelf. Figured if it didn't work out it would save me a lot of time. Man what a pile of wood.

                Dave
                http://www.pellegreneacoustics.com/

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

                Comment


                • #9
                  Re: "Effervescents" Build Thread

                  You are blowing me away! WOW!
                  No matter where you go, there you are.
                  Website

                  Comment


                  • #10
                    Re: "Effervescents" Build Thread

                    Nice to see this get along this far...
                    I see the panels now for certain, and these look fantastic!
                    How much does the unloaded cabinet weigh? I'd like to see them do well
                    and be light weight.

                    Should be a killer design!
                    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:
                    http://photobucket.com/Wolf-Speakers_and_more

                    My blog/writeups/thoughts here at PE:
                    http://techtalk.parts-express.com/blog.php?u=4102

                    Comment


                    • #11
                      Re: "Effervescents" Build Thread

                      Holy cow, lots of hours in there.

                      Any details on how you made this:?

                      Comment


                      • #12
                        Re: "Effervescents" Build Thread

                        Not sure on the weight yet. I still have to make the rear panel and put all th parts together to see. As is in the pick I'm guessing under 50lbs. They stand 42" tall x 22" deep x 12" wide so I think thats pretty light for that size of cabinet.
                        Dave
                        http://www.pellegreneacoustics.com/

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

                        Comment


                        • #13
                          Re: "Effervescents" Build Thread

                          Originally posted by nottaway View Post
                          Holy cow, lots of hours in there.

                          Any details on how you made this:?

                          Here is a thread from when I started experimenting on making these. I've come a long way in perfecting the process since then but it gives you an idea off how I came up with the idea.
                          http://techtalk.parts-express.com/sh...ABS-Wave-Guide

                          Here are a couple pics that show how I've added a base plate to set down inside the xt25 with the faceplate removed and also a mounting plate added to mount the tweeter to. I'm thinking I may mold this guide to the baffle so when it's painted you won't see a seam around it.




                          Dave
                          http://www.pellegreneacoustics.com/

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

                          Comment


                          • #14
                            Re: "Effervescents" Build Thread

                            Maybe I'm not seeing it, but how do you tighten up those screws to mount them with?
                            You obviously cannot get a stubby in there...

                            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:
                            http://photobucket.com/Wolf-Speakers_and_more

                            My blog/writeups/thoughts here at PE:
                            http://techtalk.parts-express.com/blog.php?u=4102

                            Comment


                            • #15
                              Re: "Effervescents" Build Thread

                              Can't remember. Thats been mounted to the tweeter for a while. I probably used pliers with those screws temporarily. Hex head screws would make more sense. It's good to see someone really pays attention when I post my methods for building. Way to keep me honest Wolf!

                              Dave
                              http://www.pellegreneacoustics.com/

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

                              Comment

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