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C-Note MT Bookshelf Speaker Kit Pair & Other kits

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  • jhollander
    replied
    I can't tell from the pics. I'd build a tweeter circuit free form (not with the woofer and not over under on a breadboard) and measure separately.

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  • datrumole
    replied
    well, i tried a few different measurements, and was asked in another thread to measure the tweeter without the crossover

    see the rew measurement names to get an idea of color coding

    - xover measurements -

    the below shows a full sweep assembled

    sweep with just the mid bass (mb)

    sweep with just the tweeter (tw)


    - no xover -
    just the tweeter

    you'll note the HF rise is being caused by the xover

    edit: the tweeter only measurement was run at -24dbFS, the rest were -12dbFS for illustration purposes

    now, i managed to get this on 3 completely separate builds, so one would think i would have gotten 1 right, but all 3 wrong...well...not sure what to say on that, ha. not shown is the other two identical sweeps from the other two assembled speakers (building another set for a friend)
    Attached Files
    Last edited by datrumole; 05-30-2020, 03:55 PM.

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  • datrumole
    replied
    Originally posted by jhollander View Post
    Without the 2 uF to ground (C3) in the Tweeter circuit you would get a rising response like you have shown
    thanks man, this is the best i could to illustrate the XOs, kinda need to review em all since it gets flipped over

    Attached Files

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  • jhollander
    replied
    Without the 2 uF to ground (C3) in the Tweeter circuit you would get a rising response like you have shown

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  • jhollander
    replied
    Can you share a picture of your x-o?

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  • datrumole
    replied
    verified now across 3 individual speakers, the exact same freq response on all 3....

    here is one of them with each speaker individually disconnected on subsequent responses showing the crossover appears to be in order

    Attached Files

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  • datrumole
    replied
    hey all, having a bit of an issue with my cnotes

    put them all together, was listening to them, and thought they sounded a bit bright, wanted to see if this was normal, getting a bit of a HF rise around 6.5k, i've double and triple checked my crossover to ensure it's accurate, can't figure out what is wrong.

    the good news, it's wrong on both speakers, so whatever i may have done, consistently did it

    Attached Files

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  • Josemaria
    replied
    Okay. Thank you very much for the reply.
    It had occurred to me to extend the depth of the speakers and make a double bottom, respecting the original internal measurements.
    In one place the amplifier, that way it would not occupy the internal volume of the speaker and also have both the same external appearance.

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  • Chris Roemer
    replied
    Well, IF the amp is enclosed in a box (as per the cab dimensions PDF link shows), then you'd have to add about 0.05cf to THAT speaker to compensate.
    If, however; the amp is "open back" (as all the pics on PE's site shows), then you can probably ignore that. (I think the O.S. is only about 0.15cf internal?)

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  • Josemaria
    replied
    Hi good day. I am trying to build a DIY speaker. I am in doubt between Overnight Sensation or the C-Note.
    In case of opting for C-Note, I would like to include Dayton Audio WF60PA 60W.
    How much influence on the internal volume of the speaker the WF-60PA ?.
    Is the bass response modified?
    Regards, Jose.

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  • Remy.Alexander
    replied
    Awesome thread- Was thinkng of ordering 4 pairs for my theater- Price is insane

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  • ejh2854
    replied
    It'll be interesting to see whether any of the long-rumored C-Note variations (MTM? Center?) also make the scene once components arrive.

    .

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  • Nismoron
    replied
    After reading this thread, I thought "why not" and went to order some. They are out of stock until late April. Then I figured that I would just build some from parts and make my own cabinets. The woofers are out of stock til late April. The tweeters are out of stock until June!

    Leave a comment:


  • chocolate_soymilk
    replied
    JohnBooty I've also been really happy with nearfield - they're serving as my office speakers at work and have been very pleasing. It's a real pity I can't turn them up TOO loud though.

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  • JohnBooty
    replied
    I recently started listening to my C-Notes as well again; moved them into my office.

    I had almost forgotten how great they are.

    This was actually my first time listening to them for extended periods in a nearfield setup; previous usage was in my den. I'm happy to say they really shine nearfield as well. In fact that's probably their best usage, although that's not to say they're bad otherwise.

    Every now and then I remember they were only $100 and I just have to laugh. =)

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