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4BXP Portable Speaker - Powered / Bluetooth - Full-Range

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  • MaxineDanko
    replied
    Great work done guys.

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  • STIchris722
    replied
    Originally posted by randyohoh View Post
    Beautiful, professional looking project. Is any baffle step going to be added?
    Could you please elaborate? I've done a little reading on BSC, but am not totally familiar with it. Thank you for the compliment by the way!

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  • randyohoh
    replied
    Beautiful, professional looking project. Is any baffle step going to be added?

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  • STIchris722
    replied
    Originally posted by djg View Post
    Looks like a commercial product. (Compliment)
    Thank you for the kind words. It amazes me how much time we had in this project. One would think that a smaller speaker would be less involved, but we had as much time in this as we have had in much larger speakers. The content is still there, it's simply more compact.

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  • djg
    replied
    Looks like a commercial product. (Compliment)

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  • STIchris722
    replied
    >UPDATE<

    All finished. I added a third battery board, mounted the lights/switches/plugs in the jack dish, and mounted the handle. This unit really needs a grill, but I think I'll make another unit with a broken-edge, inset grill. For now, this speaker will stay at home due to the vulnerability of the speakers. Hopefully you enjoy the progress as much as I do. This turned out and sound better than I anticipated!

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  • djg
    replied
    Just an idea.

    Vollrath 20028 Super Pan V Full Size Stainless Steel Wire Cooling Rack / Pan Grate for Steam Table Pan

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  • djg
    replied
    Beatle's suggestion is good. If you want to see the drivers, you seem talented enough to fabricate a wire mesh flat grill mounted on standoffs. One large rectangular grill covering the entire front, about 1/2" off the surface.

    This is the kind of project requiring you to look at all sorts of products, objects, and materials to adapt to your needs.

    looks nice btw.

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  • beatle
    replied
    I would definitely break in the drivers before measuring.

    This might work for your grills. I'm not sure if the brand can be removed:
    https://www.parts-express.com/visato...ivers--292-533

    PE also sells the waffle style grills, but I'm not personally a fan of those.

    As for router bits, I prefer a downspiral bit. The bottom edge is not as clean, but the top edge is clean which is what you see. This one has done good by me, cutting lots of holes in both MDF and ply:

    https://www.amazon.com/gp/product/B000K29T64

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  • STIchris722
    replied
    >UPDATE<

    I still don't have the jack dish drilled for the connectors, but the box is temporarily assembled (Thus the wires coming through the ports!). My leather Penn-Elcom handle was delivered today and I will be balancing the box and mounting it soon. This little baby sings though; I am super impressed. This is the first gen amplifier board which is supposed to have the poor BT reception. I am getting about 20 feet from the box before it starts dropping.

    What do you recommend for a grill? I kind of messed up on the box compared to how I normally build them. I'm not sure what I was thinking.....

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  • djg
    replied
    Nice work. Heads up, those titanium TBs are very thin and delicate, better use a grill.

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  • Millstonemike
    replied
    Handle?

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  • STIchris722
    replied
    >UPDATE<

    I was able to get the amplifier board wired up and installed on the back plate to the box. Everything functions flawlessly at the moment and I couldn't be happier with the results. I didn't have time to drill the jack dish to put all of the connectors in and therefore don't have a picture of the finished result. I should have an update this week.

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  • STIchris722
    replied
    >UPDATE<

    Not an earth-shattering update, but we got the Duratex applied to the box. Next comes the fun part. I'll have a decent size write-up on the next post.

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  • STIchris722
    replied
    >UPDATE<

    After the glue dried we puttied any cracks in the joints. We then sanded the entire box with 120 and 150. Once the box was sanded we took a 1/4" round-over bit to all of the edges with exception to the inside of the back where the flange is located. That area only got an 1/8" round-over.

    Upon vacuuming the box we applied a primer coat of pre-catalyzed epoxy coating to the box. This makes a durable base for the Duratex to adhere to. As soon as the Duratex is applied, then the fun begins! I cannot wait to get this put together and wired. One thing I will have to do is run DATS because the ports I have are tapered and I cannot for the life of me think of a mathematical way to calculate the appropriate port length. All software will get you close with a straight port, but DATS ultimately tells the truth.

    Does anyone know if speakers need broken in prior to running the DATS analysis for proper port tuning?

    More Updates to follow!

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