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Thread: DIY Everest DD66000....finally

  1. #76
    Senior Member timc's Avatar
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    TBH: That looks really bad off-axis
    2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)

  2. #77
    Senior Member Guido's Avatar
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    On Axis PRELIMINARY

    Here we go.
    Note that all this is preliminary with no listening tests and the first measurement. It WILL be modified.

    And yes there is a 40Hz room mode.

    first 20Hz to 20 kHz
    second 40Hz to 40kHz
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  3. #78
    Senior Member Guido's Avatar
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    Quote Originally Posted by timc View Post
    TBH: That looks really bad off-axis
    No it doesn't as nobody sits 60° off axis
    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  4. #79
    Senior Member Guido's Avatar
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    Quote Originally Posted by Guido View Post
    Also the 045Be-1 UHF is app. 4db "behind" the rest of the system because it simply don't have enough SPL.
    After looking at the 045Be-1 specs I believe it is able to produce 95-96dB. I probably need to rework the crossover.
    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  5. #80
    Senior Member ivica's Avatar
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    Quote Originally Posted by Mr. Widget View Post
    Here is a plot taken of one of my Everest IIs... taken from the listening position all room effects, floor bounce etc. are present in the plot. The blue curve is with the tweeter disconnected and the red shows the comb filtering. The effects are at such high frequencies and fairly subtle... I certainly don't the difference.

    As to the beaming of higher frequencies? I suppose, but it is still better controlled and images better than say a 2397 or any of the radial horns I've heard with or without fins/vanes.


    Widget
    Very valuable work indeed. Real data under "real operating conditions". Thank You.

    Looking at the response curve, may be one experiment can give interesting results: to connect MF driver in different polarity. Such may be 'flatten' response in crossover regions (around 800Hz, and may be at very high say over 16kHz).
    One thing more, if possible, to measure the response, say about at 30 deg off-axis. I expect much more 'irregularities' over 5kHz, but may I am wrong.

    Looking to your 'independent' measurements, and your experience :

    "...and the red shows the comb filtering. The effects are at such high frequencies and fairly subtle... I certainly don't the difference....."

    and concerning the MF-driver-476 capabilities I think that UHF 045 driver is present in original DD66000 design just a "marketing MUST".

    On the other side Guido's nice work, may be encourage some of us, to try DIY project with much more "affordable" drivers
    ( lets say 2234+2234 + 2446/5 + 2402-05, or even 2245 + 2446 + 2402-05) off-course with lot of work in the crossover networks.

    Regards
    Ivica

  6. #81
    Senior Member Guido's Avatar
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    Quote Originally Posted by ivica View Post
    Looking at the response curve, may be one experiment can give interesting results: to connect MF driver in different polarity. Such may be 'flatten' response in crossover regions (around 800Hz, and may be at very high say over 16kHz).
    One thing more, if possible, to measure the response, say about at 30 deg off-axis. I expect much more 'irregularities' over 5kHz, but may I am wrong.
    MF Driver with different polarity gives a big dip at crossover region. JBL did this right . I'll post curves of that later.
    30° response is fine. I'll post curves of that later.
    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  7. #82
    Senior Member ivica's Avatar
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    Quote Originally Posted by Guido View Post
    After looking at the 045Be-1 specs I believe it is able to produce 95-96dB. I probably need to rework the crossover.
    I do believe that You have other source of information other then this
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  8. #83
    Senior Member ivica's Avatar
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    Quote Originally Posted by Guido View Post
    Looks similar. I have the same dip at crossover region (750Hz). As soon as I manange to get jpeg's out of my system I'll post my preliminary curve. It worked before but now.... well computer science.

    I attached a curve from German Audio Magazine.
    Neglecting the problem around 750Hz 0n say up to 30 deg off-axis, the rest of the horizontal dispersion response seems to me unrealistic from mentioned magazine measurements

  9. #84
    Senior Member Guido's Avatar
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    Quote Originally Posted by ivica View Post
    On the other side Guido's nice work, may be encourage some of us, to try DIY project with much more "affordable" drivers
    ( lets say 2234+2234 + 2446/5 + 2402-05, or even 2245 + 2446 + 2402-05) off-course with lot of work in the crossover networks.

    Regards
    Ivica
    ONLY with Truextent Diaphragms. An Everest inspired Project without Beryllium is nonsense in my eyes. Advantage is that you can save the UHF driver which gives you the money for Beryllium.
    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  10. #85
    Senior Member ivica's Avatar
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    Quote Originally Posted by Guido View Post
    ONLY with Truextent Diaphragms. An Everest inspired Project without Beryllium is nonsense in my eyes. Advantage is that you can save the UHF driver which gives you the money for Beryllium.
    On my option, the advantage of the DD66000 : there is really only one crossover point about 750 Hz...,and, fortunately almost the whole audio bandwidth is "covered", owing to MF driver fantastic capabilities, and large horn good matching and wide dispersion.

    Concerning the K2-S9900 information about total "emitted" sound power given in:
    http://www.audioheritage.org/vbullet...l=1#post252245
    http://www.audioheritage.org/vbullet...1&d=1242930780

    that new H66000 horn is kind of "miracle"

  11. #86
    Senior Member Guido's Avatar
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    Assembling

    Here are some pics of the assembling process.
    Sub, LF and UHF boards are ready. MF boards are still outside the cabinet on evaluation boards. That's why FR curves need to wait a bit.

    Pic 1-5 crossover boards outside and inside cabinet
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    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  12. #87
    Senior Member Guido's Avatar
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    Pic 1: UHF board

    Pic 2: MF and UHF driver inside cabinet

    Pic 3: evaluation board (controlled chaos )
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    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  13. #88
    Senior Member Guido's Avatar
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    Lying on it's back
    Woofer and spikes installation
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    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  14. #89
    Senior Member Guido's Avatar
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    Here we go

    Listening has started
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    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  15. #90
    Senior Member Amnes's Avatar
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    "I'm too sexy for my cat" - said the Everest.

    Retarded quality craftsmanship. Are those black mundorf caps bipolar elkos?

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