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Fun with the new ND Passive's - The Passive Aggressives

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  • robertf
    replied
    I purchased the kit on Saturday (3-2-19). Staff had to pull the kit and there was confusion on ringing me out. They said I was one of the first to buy the kit and there were technical difficulties with checkout. Had to stand around in showroom for about half an hour. Hope they get everything worked out for us people that are fortunate to be able to walk into Parts Express and buy the goodies! I have built the Helium's for desk top at work and I have never built a passive radiator design, so I will try these out.

    Leave a comment:


  • mlau
    replied
    Interesting looking project.

    a few dumb questions:
    1. How picky are these for placement?
    2. Do you think the passive radiators could be mounted inside?
    Alternatively, could I add a rim of material to protect the radiator during excursions?

    i would like to have a small speaker to put in a bookshelf

    Leave a comment:


  • djg
    replied
    Nice.

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  • Jake
    replied
    Originally posted by silverD View Post
    Here is a final shot of the pair...
    Click image for larger version

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    Beautiful job! Those turned out nice. Are you happy with the sound?

    Leave a comment:


  • silverD
    replied
    Here is a final shot of the pair...
    Click image for larger version

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    Leave a comment:


  • silverD
    replied
    I finally got around to staining the boxes and went with java. I found I had to notch the cutout for the ND91 to allow for the terminal connections. I built the crossover on a small pcb and had to verify driver clearance in the box before I glued and soldered it together. I also insulated the connectors for the ND91 as I was concerned they might short to the driver frame. When I designed the finger joint boxes, I used the dimensions provided by Matt early in the thread and before the kit was available. I chose to offset the PRs like he suggested. After I assembled the first speaker, I tested it out and heard an odd noise as I turned up the volume. After some troubleshooting, I found the issue to be the lower mounted PR weights contacting the ND91 magnet on larger excursions. This was resolved with a bit of filing of the weights. My box dimensions are probably slightly off the flat pack provided in the kit. As others have noted, this is a tight build. The speakers sound great and provide more bass than their size would indicate. Here are some pics...
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  • mikejennens
    replied
    Originally posted by djg View Post
    A crossover built on a big (comparatively speaking) round terminal plate might work, would require a cab change. I had to stack up my components and I fit the board on the bottom, more room on the back or even top. Perhaps a manual pictorial showing how to fit it all in. Tom Zarbo did a great job with pictures and instructions on fitting his Bantam crossover.
    There is a pretty good diagram with the instructions. But, yeah, I had to stack components and I mounted the board on the bottom. I used these: https://www.parts-express.com/10-pcs...x-7cm--320-472

    Leave a comment:


  • djg
    replied
    A crossover built on a big (comparatively speaking) round terminal plate might work, would require a cab change. I had to stack up my components and I fit the board on the bottom, more room on the back or even top. Perhaps a manual pictorial showing how to fit it all in. Tom Zarbo did a great job with pictures and instructions on fitting his Bantam crossover.

    Leave a comment:


  • mattp
    replied
    Originally posted by mikejennens View Post
    Hey Matt,
    Is there any chance a PCB that's already set-up for the crossover components could be included? I realize it would add to the cost, but given the choice, I'd rather build the cabinets compared to fitting the crossover for this little guy. Nothing earth-shattering, but on a build this size, everything is REALLY cramped. It would be great to have a board oriented for the crossover parts.

    By the way, these little guys are amazing. They definitely out-perform their size!

    Thanks,
    Mike
    I agree, the crossovers are tricky to get fitted. A PCB would be nice and I can look into it for these to see what cost increase there would be.

    UPDATE: It looks like the component-only kit will happen at a small cost savings over the full kit. I would expect to see this up in the next week or two, I will have make changes to the manual.

    Leave a comment:


  • mikejennens
    replied
    Hey Matt,
    Is there any chance a PCB that's already set-up for the crossover components could be included? I realize it would add to the cost, but given the choice, I'd rather build the cabinets compared to fitting the crossover for this little guy. Nothing earth-shattering, but on a build this size, everything is REALLY cramped. It would be great to have a board oriented for the crossover parts.

    By the way, these little guys are amazing. They definitely out-perform their size!

    Thanks,
    Mike

    Leave a comment:


  • mattp
    replied
    These are indeed the 0.04 knock downs, just with driver cutouts.

    For those interested, I am working on getting a component-only version of this kit available. To be honest, the price of the kit as it is now basically means you are getting the cabinets for free anyway, so I don't know if a component-only kit would be viable. There is nothing saying you can't buy the kit and toss the cabinets, although I would have a hard time doing that too.

    I'll keep y'all informed.

    Leave a comment:


  • 3rutu5
    replied
    Whoops, not sure what I read then. My bad

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  • Chris Roemer
    replied
    Pretty sure post #1 states that these are the Denovo 0.04cf boxes, so...

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  • 3rutu5
    replied
    Sounds like a good base for a BT speaker build. What do you think a smaller bunch of drivers and radiator be like and box size? Let's say the ND65. Those boxes look quite small, but noticed they are 0.16cu.ft they still have a bigger footprint than anticipated, which I think cramming a 4" is why I got confused.

    love the idea of getting that lower frequency for a small driver

    Leave a comment:


  • mikejennens
    replied
    Already done, Matt. I'll post some photos when they're done as far as staining goes.
    ​​​​​​Thanks!

    Leave a comment:

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