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It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit midwestaudiofest.com for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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Insane Halfinator build with DSP, bluetooth and Lithium battery

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  • Insane Halfinator build with DSP, bluetooth and Lithium battery

    The last few months my roommate and I have been planning on building the ultimate outdoor speaker. We went with the Halfinator design by Saturnus, but went all out with the electronics. This includes:
    -Digital Signal Processor
    -High power class-D amplifier
    -The premium tweeters (PHT407N)
    -High power 18.5V lithium battery
    -Long range V4.2 Bluetooth
    -3D printed input panel
    -Swappable battery
    -Birch plywood construction with routed slots for easy and strong construction
    -All black tuffcab finish with a crazy color custom aluminium grill with foam insert.

    Now that I write it out, I realize how insane this build really is. We are quite far in the process, but not finished. The build log will be posted bit by bit, so stay tuned.

  • #2
    Begin construction: wood is cut and first slots are routed

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    Festool making the job easy

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    First few panels done

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    Halfway there

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    Woofer testfit

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    Next up: routing, drilling and assembly

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    • #3
      Wondering how many watts (mA) the DSP requires. The Boominator / Halfinator was designed for super efficiency with a small digital amp.

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      • #4
        Originally posted by Millstonemike View Post
        Wondering how many watts (mA) the DSP requires. The Boominator / Halfinator was designed for super efficiency with a small digital amp.
        The total power consumption of all electronics combined is below 50mA on normal listening volume, which translates to 50+ hour playtime with the battery we used (5S 3Ah lithium)
        More info on this will follow in the electronics part of the build log.

        Here is a sneak preview of all (yes all) electronics that are used in this build:
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        • #5

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          • #6
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            • #7
              Is the electronics board your design or is it a commercially available board?

              Thanks....
              "Everything is nothing without a high sound quality." (Sure Electronics)

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              • #8
                ernperkins Both. It is my design but it should be commercially available soon (<2 months)

                Painting...

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                3D printed input panel with all connectors and battery compartiment

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                • #9
                  Input panel in place, without all connectors.
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                  Finished product:

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                  The PCB still needs some minor work, but overall the performance is amazing and it has lasted 2 weeks (!) with daily use.

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