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Introducing: The Pit Vipers (Ooh Yeah!!!)

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  • Introducing: The Pit Vipers (Ooh Yeah!!!)

    I was intending to keep this project secret until I was completely finished because I didn't want people making too many assumptions about it. But I suppose I'm at a point now where I can at least start sharing my thoughts on the matter, and you all can watch it progress.

    So here it is, a speaker guys have been clamoring for since before I even started this hobby: a true "monkey coffin" party speaker. I have avoided doing one of these speakers all these years for a few reasons. See, my childhood was made up of "monkey coffin" speakers from the 70s and 80s. But I don't really mean that in a good way. Like, most of the speakers I grew up with, while heavy and imposing-looking, didn't actually sound that great. Often the highs were rolled WAY off due to use of cone tweeters, the bass was either muddy or boxy, and never actually extended all that deep, and there was almost no imaging or soundstage to speak of. Also, once HTIB and svelte high-end speakers hit the market, these sort of "big box party speaker" was considered just plain ugly by the general public.

    But maybe nostalgia finally comes all the way around eventually. When I saw that JBL is selling new L100s with a whopper of a price tag it occurred to me that maybe people really do honestly enjoy a good monkey coffin to chill out to their tunes.

    So I spent a lot of time last winter studying and pondering some of the more famous of these sort of big rectangular speakers: the aforementioned L100, the Yamaha NS-1000, Harbeth, Acoustic Research, etc. I thought about what kind of things I could do with current drivers, and how to make them sound the way I wanted them to sound.

    I ended up wanting to base it around a 12" woofer (in this case, technically a "subwoofer"), and some sort of standard 1" dome tweeter along the lines of the standard Vifas and Seas we've all grown to love over the last 25 or so years. The mid has been the puzzler. I'm still debating this one. Initially I wanted a 5" mid to keep the aesthetic, but there just aren't many 5" mids that can keep up with a 12" woofer. So I currently have a DC130-4 in there, and it's working good; but I'm keeping my options open.

    Because yeah, this guy's not done yet. But rather than just live inside my head, I thought I'd share my thoughts as I work.

    More to come...
    Attached Files
    Isn't it about time we started answering rhetorical questions?

    Paul Carmody's DIY Audio Projects
    Twitter: @undefinition1

  • #2
    Its not a 5" driver, but the 4" SB Acoustics SB12MNRX2-25-04 has intrigued me for use as a midrange. I was looking at it when I recently built my 12" woofer based towers. I ended up using the Faital Pro 4FE35 instead, but mainly because I had used it before and liked it. Both have sensitivity over 90db.

    Comment


    • Paul Carmody
      Paul Carmody commented
      Editing a comment
      Wow! The FR on that SB midrange is phenomenal!! I think if I was aiming a bit more upmarket in price that thing would have been a fantastic fit.

      I'm trying to keep this guy in the quasi-budget speaker range--although it's a bit hard finding a decent "budget" 12" woofer. Hence, the woofer I used here is by far the most expensive component.

  • #3
    I just had to, Paul! I'm excited to see what comes of this one. Glenn.
     

    Comment


    • #4
      This is exactly what I've been wanting to build. Keeping a keen eye on these.

      Comment


      • #5
        That must be the Designer Series 12 inch woofer based on the cone and the five mounting screws. With that DC130-4 as the mid how will you keep the minimum impedance above an exceptable value through the midbass/midrange area?
        Craig

        I drive way too fast to worry about cholesterol.

        Comment


        • #6
          Originally posted by PWR RYD View Post
          That must be the Designer Series 12 inch woofer based on the cone and the five mounting screws. With that DC130-4 as the mid how will you keep the minimum impedance above an exceptable value through the midbass/midrange area?
          Close. It's the Dayton SD315A-88. So yeah, this is more of a "4 Ohm" speaker. Honestly, though, a lot of what's sold at the retail level as "8 Ohm" is actually much lower than that. (If they can cheat, why can't I?)

          As usual, I take as much precaution as I can to make sure the speaker will play well with the widest variety of amps possible. So far I haven't sent any of my amps into protect mode. I suppose when I get close to the end, I can try it on some really sh**y amps and see what happens.
          Isn't it about time we started answering rhetorical questions?

          Paul Carmody's DIY Audio Projects
          Twitter: @undefinition1

          Comment


          • #7
            How do these compare to The Tarkus speakers ?

            Comment


            • #8
              Originally posted by Paul Carmody View Post
              Close. It's the Dayton SD315A-88. So yeah, this is more of a "4 Ohm" speaker. Honestly, though, a lot of what's sold at the retail level as "8 Ohm" is actually much lower than that. (If they can cheat, why can't I?)

              As usual, I take as much precaution as I can to make sure the speaker will play well with the widest variety of amps possible. So far I haven't sent any of my amps into protect mode. I suppose when I get close to the end, I can try it on some really sh**y amps and see what happens.
              The SD315-88 is actually a really nice woofer/subwoofer. Good power handling, decent sensitivity, and a really good FR. Ive used it a few times myself and will use it again soon.
              https://www.facebook.com/Mosaic-Audi...7373763888294/

              Comment


              • #9
                I was thinking that was the SD-DVC12, and it seems that many coffins have used the DVC models to big success.
                Scott used the 10 in the Indium7, and it was great too.
                Darren used the 12 x2 in the old MCL.

                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

                Comment


                • #10
                  Originally posted by Wolf View Post
                  I was thinking that was the SD-DVC12, and it seems that many coffins have used the DVC models to big success.
                  Scott used the 10 in the Indium7, and it was great too.
                  Darren used the 12 x2 in the old MCL.

                  Wolf
                  Isn't this the larger version of the 8" you used in the Zingers ?

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                  • #11
                    Awesome project! Love me some monkey coffins
                    Carbon13

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                    • #12
                      Originally posted by Serenitynow View Post

                      Isn't this the larger version of the 8" you used in the Zingers ?
                      It is indeed
                      https://www.facebook.com/Mosaic-Audi...7373763888294/

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                      • #13
                        Personally, I think those look great. I have nowhere to put more speakers and yet I really want to build a set (those and the mentioned zingers). I'm getting to old to try to store them in the attic.

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                        • #14
                          Wow!…..I’m sure you’re voicing will squeeze the most out of those drivers. Always appreciate your focus on budget with your designs!

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                          • #15
                            Although I can't fit such a loud speaker in my room, I'm still happy to see it. Keep an eye on the progress

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