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Continuum's with split personality. My first DIY build.

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  • Continuum's with split personality. My first DIY build.

    Howdy from Texas, y'all. I figured I'd make my first post a big one. I've been lurking around these forums and the DIY community for nearly a year now, but mostly been watching with great intrigue and curiosity. However, I recently caught the bug to build, so I began a search for a great near-field vocal music monitor.

    After much reading, studying, and agonizing - I decided against building my own brand new design that's never been proven before. Instead - I decided to go with the Continuums (and I'm glad I did). However, since I wouldn't be challenging myself and growing my knowledge trememdously on the aspects of baffle step compensation, driver selection, crossover design, and the likes - I decided to challenge myself on the woodworking front.

    The original design of the Continuum's is phenominal, gorgeous, classic, and many other surpurlative adjectives. However, I'm not the biggest fan of maple. I've been renovating my 1930's home from the studs out for nearly 3 years now, so I've done quite a trememdous amount of woodworking and have significant tools at my disposal. So, I decided to build my Continuum's out of walnut (with a maple stripe down the center to honor the originals). I'd never worked with walnut before, so this was going to be an adventure and challenge of epic proportions on my woodworking skills.

    Well, I went to buy the walnut and nearly fainted at the price. So, my Continuum's all of the sudden developed a split personality (Walnut and Oak separated by Maple).

    The front and rear baffles are removable (I thought this was how it was suppoed to be done, not that the front was only removable). This was eventually discovered to be a boo-boo, but I actually like it. It provides some front-to-rear symmetry.

    All wood was glued (Gorilla wood glue) and biscuited, and clamped hard for a minimum of 30 minutes before handling. The exception here are the front baffles. For these, I had to use dowels to avoid the biscuits from showing up in the woofer cutout. There's three dowels in each joint (one above, below, and in between the drivers).

    All of the panels were sanded with a belt sander to 80 grit and then 120 grit. I finish sanded the raw wood with 220 grit random-orbit. The outer finish is Watco Danish Oil and that's it. I put on one coat straight, then used the danish oil to wet-sand in two coats with 400 grit, then a final straight finish coat (4 coats total). The end result is spectacular. I won't profess to be a professional woodworker, and my cabinets certainly have boo-boos and errors where drill bits, sanders, and saws got away from me. However, you'll have to look hard to find them, and I'm super happy. One of my boo-boos was covered up by the (spray painted black) washers I inserted behind the binding posts. I actually like how this looks, regardless of the fact that it's covering up a spot where the drill bit took out a bit too much surface wood on me.

    Because I was working with walnut and oak (instad of solid maple), I was slightly worried about additional cabinet resonances (above and beyond the original design). At work, I happened to have some unused Accumat Hyperflex (similar to Dynamat), so I lined the sides, top, and, and back with this prior to installing the foam. The crossovers were laid out on a 4x6 RatShack PCB and mounted to the bottom of the cabinets. The cabinets are resting on 4 felt feet to provide some isolation from the desk.

    I've only been listening to them on my NAD for about 2 hours now, and I'm floored. Mr. Bagby - Kudos! These are phenominal speakers. I can only say that they are well worth the $1200+ price tag from Salk Sound. I mearly hope that my interpretation of your design meets with your approval.

    Anyways, I do have more picutres on another camera that show more of the build process, but without further adeu...

    The front baffle prepped for driver cutout:


    The tweeter post holes drilled out first:


    The tweeter flange cutout:


    The full tweeter cutout from the back:


    The woofer offset cutout from the back. You can see some of the joining dowels in this pic.


    The full woofer cutout from the front, prior to adding a 1/4" roundover.


    Test fit of the drivers on raw baffle:


    Test fit from the back side:


    All the wood laid out and ready for the first coat of Watco:


    After the first coat:


    Waiting on the final (4th) coat of Watco to set up:


    Showing the crossover mounted and the Accumat installed, prior to foam being glued in:


    Foam installed and ready for the baffles:


    Done! Here, you can see how the wood started by looking at the woofer cutout disc on top of the left speaker.


    And finally, the money shots:





    DARPA Jr - 2015 InDIYana Winner - RS180-8 + RS100P-8 + ND25FA
    The Aria's - RS150-4 (or RS150-8) + XT25SC90
    The Mariposa's - TEBM65C20F-8 + ND16FA
    The Canzonetta's - RS100P-8 and ND16FA
    AudioSource AMP-100 Mods OR Pyle PAMP1000 Mods

  • #2
    Re: Continuum's with split personality. My first DIY build.

    Stunning!!

    Comment


    • #3
      Re: Continuum's with split personality. My first DIY build.

      That's handsome!

      I keep looking at that kit, and I really should pull the trigger. It would be a change from an MDF/veneer box. Working with solid wood has a lot of appeal to me.
      Bill Schneider
      -+-+-+-+-
      www.afterness.com/audio

      Comment


      • #4
        Re: Continuum's with split personality. My first DIY build.

        nicely done and nice writeup.
        " 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/

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        • #5
          Re: Continuum's with split personality. My first DIY build.

          Really nice looking , excellent job.
          Thanks ,
          JB

          Comment


          • #6
            Re: Continuum's with split personality. My first DIY build.

            DANG that looks awesome! Great Job!

            रेतुर्न तो थे स्रोत
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            • #7
              Re: Continuum's with split personality. My first DIY build.

              Originally posted by tyger23 View Post
              The front and rear baffles are removable (I thought this was how it was suppoed to be done, not that the front was only removable). This was eventually discovered to be a boo-boo, but I actually like it. It provides some front-to-rear symmetry.

              I've only been listening to them on my NAD for about 2 hours now, and I'm floored. Mr. Bagby - Kudos! These are phenominal speakers. I can only say that they are well worth the $1200+ price tag from Salk Sound. I mearly hope that my interpretation of your design meets with your approval.
              Those are absolutely stunning! I will have to add those to my "Continuum Hall of Fame". I am so happy that you are pleased with how they sound.






              About that removeable back panel - mine are made exactly like yours. I did not know that was a no-no. I wonder what I am going to do now? ;)


              Jeff B.
              Click here for Jeff Bagby's Loudspeaker Design Software

              Comment


              • #8
                Re: Continuum's with split personality. My first DIY build.

                Originally posted by Jeff B. View Post
                Those are absolutely stunning! I will have to add those to my "Continuum Hall of Fame". I am so happy that you are pleased with how they sound.

                About that removeable back panel - mine are made exactly like yours. I did not know that was a no-no. I wonder what I am going to do now? ;)

                Jeff B.
                Jeff, I'm glad you like them. I'll try and post measurements in a week or so after they've gotten some playing time. Is there any recommended break-in procedure that you follow?

                With regards to the removable back panel - I only figured out the back panel was "not supposed to be removed" when I realized that there weren't enough hurricane nuts and bolts in the Meniscus kit for the back panel. There were only 20 - 10 each for the front panels.

                Luckily, there is a local shop, "Austin Bolt Company", that sold a near matching bolt/nut combo. That's a good thing because I only realized the lack of 40 nuts and bolts AFTER I had drilled out the baffles and mounts.
                DARPA Jr - 2015 InDIYana Winner - RS180-8 + RS100P-8 + ND25FA
                The Aria's - RS150-4 (or RS150-8) + XT25SC90
                The Mariposa's - TEBM65C20F-8 + ND16FA
                The Canzonetta's - RS100P-8 and ND16FA
                AudioSource AMP-100 Mods OR Pyle PAMP1000 Mods

                Comment


                • #9
                  Re: Continuum's with split personality. My first DIY build.

                  too gorgeous - wow. You absolutely made the right choice for your first build, and now you have a reference
                  quality speaker to compare future efforts with.

                  I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
                  "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

                  High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
                  SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
                  My Voxel min sub Yet-another-Voxel-build

                  Tangband W6-sub

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                  • #10
                    Re: Continuum's with split personality. My first DIY build.

                    They are much prettier in execution than in description. In fact, they are quite striking works of art. They should sound as good as they look too.

                    Comment


                    • #11
                      Re: Continuum's with split personality. My first DIY build.

                      Originally posted by tyger23 View Post
                      Jeff, I'm glad you like them. I'll try and post measurements in a week or so after they've gotten some playing time. Is there any recommended break-in procedure that you follow?

                      With regards to the removable back panel - I only figured out the back panel was "not supposed to be removed" when I realized that there weren't enough hurricane nuts and bolts in the Meniscus kit for the back panel. There were only 20 - 10 each for the front panels.

                      Luckily, there is a local shop, "Austin Bolt Company", that sold a near matching bolt/nut combo. That's a good thing because I only realized the lack of 40 nuts and bolts AFTER I had drilled out the baffles and mounts.
                      I am sure if you had contacted Mark at Meniscus he would have sent you right out the nuts and bolts you needed. I didn't even know the kit included the nuts. I will have to inquire on that.

                      Breaking in? I just play music for a while. It really doesn't take very long for the suspension for loosen up. I think most the talk about long break-in periods is mostly about breaking in the listener. ;)

                      Jeff
                      Click here for Jeff Bagby's Loudspeaker Design Software

                      Comment


                      • #12
                        Re: Continuum's with split personality. My first DIY build.

                        Very nice! You are a very accomplish woodworker! Is that 5/4 lumber? Or just 1 by. +1 on the Watco! It eliminates the "Finish is a good carpentry project gone bad" problem that I've had in the past. I like to follow it up with a coat of Briwax, buffed with an electric buffer. Adds just a touch of sheen and helps to protect just in case some idiot sets a drink on em at during a party. Nice job! Mark

                        Comment


                        • #13
                          Re: Continuum's with split personality. My first DIY build.

                          Welcome to the Continuum club! Ain't it neat to have the designer chime in on your build?

                          If you're only using them in their "intended" application as a near field monitor on your desk (or sound board), you have a wonderful surprise coming. Set them up as a free-standing, stereo pair in a fairly live room. They disappear. I don't hear sound from speaker locations so much as the whole end of the room, with lots of wrap-around. My first DIY event was one of Jeff's early public presentations, and the only other speakers that disappeared that day were Salks (no surprise).

                          Needless to say, I was delighted when my build did the same. There's something almost magical here...

                          Have fun,
                          Frank

                          Comment


                          • #14
                            Re: Continuum's with split personality. My first DIY build.

                            Originally posted by Jeff B. View Post
                            I am sure if you had contacted Mark at Meniscus he would have sent you right out the nuts and bolts you needed.
                            I'm sure he would have. His customer service has been fantastic. I just didn't want to wait another week for parts to arrive when it only costs me $5 at the local shop.

                            His kit included absolutely everything for the build except the cabinet. Hurricane nuts and bolts for the front baffles, an option of hurricane nuts and bolts or wood screws for the tweeter, bolts and lock nuts for the woofers, gasket tape (enough for the drivers, but not enough for the baffles), crimp-on terminal spades, speaker wire, crossover parts, and drivers.

                            Speaking of the crossover - I was assuming that the crossover design you used would require the tweet and woofer to be out of phase from each other. The schematics from Meniscus indicated in-phase, so I wired them in-phase. Can you just confirm why in phase works with this crossover?
                            DARPA Jr - 2015 InDIYana Winner - RS180-8 + RS100P-8 + ND25FA
                            The Aria's - RS150-4 (or RS150-8) + XT25SC90
                            The Mariposa's - TEBM65C20F-8 + ND16FA
                            The Canzonetta's - RS100P-8 and ND16FA
                            AudioSource AMP-100 Mods OR Pyle PAMP1000 Mods

                            Comment


                            • #15
                              Re: Continuum's with split personality. My first DIY build.

                              Originally posted by Psycoacoustics View Post
                              Is that 5/4 lumber? Or just 1 by. +1 on the Watco!
                              I purchased S4S 1x4 (3/4" by 3.5") from the local wood shop here in Austin (Fine Lumber). It was $3.93 per linear foot for the walnut, so I about choked on the price. The Oak and Maple were significantly cheaper.

                              The Watco was fantastic. This was the first time I've used it, but it was so forgiving and easy, it won't be the last time I use it!
                              DARPA Jr - 2015 InDIYana Winner - RS180-8 + RS100P-8 + ND25FA
                              The Aria's - RS150-4 (or RS150-8) + XT25SC90
                              The Mariposa's - TEBM65C20F-8 + ND16FA
                              The Canzonetta's - RS100P-8 and ND16FA
                              AudioSource AMP-100 Mods OR Pyle PAMP1000 Mods

                              Comment

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