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Seriatim from InDIYana and MWAF

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  • HiHoSilverado
    replied
    Wow, great catch. Thank you! I am so glad you caught that before I put them in the cabinets. I got the cabinets mocked up today for the first time. I think the oak looks great with the warm white paint. I am up cycling some old desk legs for the stands that will also be white and oak. Hopefully, I will be able to do final assembly on the cabinets this week. The stands probably won’t get done before Thanksgiving though. I am really looking forward to listening to these! Sent from my iPhone using Tapatalk

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  • jhollander
    replied
    From what I can tell in the picture you might be missing a wire. Also I labeled the woofer positive lead. See attached

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  • HiHoSilverado
    replied
    Great, thank you! Sent from my iPhone using Tapatalk

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  • jhollander
    replied
    You can use mineral wool or fiberglass in a polyester batting pillow and place it behind the woofer under the port.

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  • HiHoSilverado
    replied
    First coat of paint on the cabinets: Sent from my iPhone using Tapatalk

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  • HiHoSilverado
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    Crossover and schematic: Sent from my iPhone using Tapatalk

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  • HiHoSilverado
    replied
    So, it has taken 3 years to finally get this project under way (adding a second kid to the family really slowed me down) and I am getting close to assembly. I used the PE .5ft knock down cabinets and made the baffles out of Oak board. The baffles will be finished with gloss poly and the cabinets with white paint to match the trim in my house (my wife’s idea). I have a question about the interior insulation- the specs say Roxul and batting on the sides and back. By Roxul, do you mean mineral wool insulation? Do you use spray adhesive or just cut it fat and press in to place? Thanks, pics are forthcoming. Sent from my iPhone using Tapatalk

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  • HiHoSilverado
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    Re: Seriatim from InDIYana and MWAF

    Thanks for the input. I will post pics once I get started.

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  • jhollander
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    Re: Seriatim from InDIYana and MWAF

    The rectangular baffle will change the tweeter response a bit so your result will be different. You can you a 2 inch port without a problem. Rear mount is OK.

    If you go rear mount you can use the PE adjustable 2 inch port, http://www.parts-express.com/speaker...table--260-387

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  • HiHoSilverado
    replied
    Re: Seriatim from InDIYana and MWAF

    Thanks for sharing what looks to be a great design. I would like to build a version of these using the P/E .56cf flat pack cabs (#300-7064) and flared ports. Precision Ports' website port-length calculator suggests using a tube length of about 6.4 inches to tune a 3 inch diameter port to 50hz. Does this sound right? The suggested 2" diameter port length would only leave .5 inches of tube after subtracting 5 inches from the calculated length (per their instructions). See http://www.psp-inc.com/tools2.html.

    I built a pair of Zaph Audio SR-71s using the same cabinets and they sound fantastic. However, the SR-71s are rear-ported because the baffle lacks space for a front-mounted flare port. Would rear-mounting the port here seriously impact sound quality (they will go on stands, not on a bookshelf)? If so, any other suggestions for commercially available port alternatives? I am confident I can build the rectangular ports per the provided design, but would like to do the build as off-the-shelf as possible to encourage others without advanced woodworking skills.

    I am looking forward to comparing these with my SR-71s down the road.

    Winston

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  • jhollander
    replied
    Re: Seriatim from InDIYana and MWAF

    The subjective results were good. I do not have actual measurements. Here's pic of the modeled response at 45 degrees.
    Attached Files

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  • NyxOne
    replied
    Re: Seriatim from InDIYana and MWAF

    Beautiful project and congrats on your first place!

    Do you have any off axis measurement ? I'm curious how well your project did off axis being that you cross a 7" driver relatively high (3.8khz ?)

    Chucky

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  • donradick
    replied
    Re: Seriatim from InDIYana and MWAF

    Very beautiful design and execution!
    Ever since I saw a pic of those I was wondering about them.

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  • jhollander
    replied

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  • isaeagle4031
    replied
    Re: Seriatim from InDIYana and MWAF

    Great work John. This is a super nice speaker. Kinda glad I didn't have to compete against you twice!

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