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

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  • 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?

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  • 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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  • 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
    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:


  • 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.

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

    Leave a comment:


  • 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:


  • mattp
    replied
    Originally posted by mikejennens
    Got these put together this morning. No stuffing. I am very impressed! They really sound much bigger than they are. I've been running a few of my test songs through them and other than a bit of trouble with the lowest parts of "Flight of the Cosmic Hippo" they have been doing great. I might have been asking too much from them, so I won't deduct any points. Private Investigations by Dire Straits sounded great. These will soon be on my desk at work, so imagine they'll really shine. Great little speaker.
    I haven't put a finish on them yet. That's going to happen today and tomorrow. I haven't decided yet, but probably walnut veneer.
    Mike
    Thanks for the feedback Mike! Don't forget to post a review on our website too!

    Leave a comment:


  • mattp
    replied
    Originally posted by mikejennens
    I haven't done anything with PRs yet, so I need to ask a question about them. I noticed no mention of stuffing or lining the walls. Is this typical with a design using a PR(S) or did I miss it?
    Thanks,
    Mike
    Mike (et al),

    I did not include any stuffing or lining in mine but it just depends on your personal tastes. Frankly I didn't use any because those little boxes were pretty well packed from the start so I didn't want to try to cram anything else in them. I doubt you will notice an audible difference one way or the other.

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  • djg
    replied
    I threw a wad of poly in mine. There's hardly any wall space for lining.

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  • djg
    replied
    Try calling PE with money in hand, see what they say. IME, they discount kit prices a bit. For example, my 8" 250DSP sub kit price was the amount of the amp and driver. PE threw in the flat pack and a sheet of upmarket sound deadener.

    Don't forget you'll still need binding posts and screws with this kit.

    You know if it's cheaper than buying all the components, buy it. They are very nice sounding little speakers, and very entertaining to watch.

    Leave a comment:

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