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50th Birthday Gifts from Jkim & Zaph

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  • #1

    50th Birthday Gifts from Jkim & Zaph

    These are JKim's design from Zaphs contest. His design was the only acoustic LR 2nd order design entered. The drivers are Zaph's ZA14W08 and Acoustics SB29RDCN, approx. price is $ 250.00. Jkim's write up and crossover are on Zaph's webpage. I decided to try a trapezoidal enclosure, keeping the baffle the same dimensions. The width is 8", height is 14", depth is 12" , and the back is 4.75 approx. .36 cu ft volumn. I cut the angles at 7 degrees. I'm not happy with the finish, but since this was an experiment I will put another set of speakers in them and do another build for these. They deserve a better enclosure. I'm showing them at KYDIY with a quick voicing with Robert tomorrow night. So when someone sends you an email and ask you if you're willing to build and extra pair of speakers and all you have to buy is the crossover parts, say yes. Thanks Jkim & Zaph! Who's got a name for them? :D
    Tim
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  • #2
    Re: 50th Birthday Gifts from Jkim & Zaph

    the Prefects.

    "Beeblebrox" just doesn't roll off the tongue.
    Best Regards,

    Rory Buszka

    Taterworks Audio

    "The work of the individual still remains the spark which moves mankind ahead, even more than teamwork." - Igor I. Sikorsky

    If it works, but you don't know why it works, then you haven't done any engineering.

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    • #3
      Re: 50th Birthday Gifts from Jkim & Zaph

      After this KYDIY weekend and Zaph's contest, maybe "The Seconds". :D They are sweet sounding for the size. Tim

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      • #4
        Re: 50th Birthday Gifts from Jkim & Zaph

        Originally posted by theLinks View Post
        After this KYDIY weekend and Zaph's contest, maybe "The Seconds". :D They are sweet sounding for the size. Tim
        Did you modify the crossover during the pre-show voicing? Any comments about the drivers themselves? Overall comparisons to other speakers?
        Brad
        piano black sealing mdf irregular recesses grill technique

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        • #5
          Re: 50th Birthday Gifts from Jkim & Zaph

          Originally posted by bmaupin View Post
          Did you modify the crossover during the pre-show voicing? Any comments about the drivers themselves? Overall comparisons to other speakers?
          The crossover is exactly as JKim's original design for Zaph's contest. I believe most or all had positive comments on the drivers. Wolf and Froste can give a better opinion and I hope they do here. The only comment from both of them was the tweeter needed another 1/2 ohm or so, to pad the SB29 Tweeter down a tad. I thought that when I was voicing them a day and a half before the DIY, but thought I would take them there to get the expert"s opinions.
          Tim

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          • #6
            Re: 50th Birthday Gifts from Jkim & Zaph

            This was my 1st time to here the ZA14s, and I liked how they sounded. I did think the SB29s were a bit "hot", a .5-1.5 ohm more padding would make a good sounding speaker even better. The CKYDIY room was making some tweeters sound somewhat "hot", so I'm not sure just how much pad is needed. Over all it was a very good sounding speaker, now I have another driver (ZA14) that I'll have to get. Maybe a Mid in a 3-way tower or 2.5 monitor. The list keeps getting longer. Can't wait for the next event to hear some more great speakers.
            Ed
            ___________________________________________
            If "IFs" and "BUTs" were candy and nuts, everyday would be Christmas!
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            • #7
              Re: 50th Birthday Gifts from Jkim & Zaph

              I switched R1 from 5.6 ohm to 6.8 ohm resistor last week. I believe the padding really helped and took the sizzle out. Hopefully I can take them to St. Louis for another gathering. So thanks for your opinions Wolf and Froste. "The Prefects", maybe now. :D
              Tim

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              • #8
                Re: 50th Birthday Gifts from Jkim & Zaph

                The Links.
                No matter where you go, there you are.
                Website

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