Page 3 of 12 FirstFirst 12345 ... LastLast
Results 31 to 45 of 167

Thread: DIY Everest DD66000....finally

  1. #31
    Junior Member Toms Studio's Avatar
    Join Date
    Nov 2005
    Location
    Germany
    Posts
    26
    Wow, wow, wow. They look super nice.

  2. #32
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506

    First part of the horn

    Quote Originally Posted by 4313B View Post
    Like Greg has said, most of the "horn" is for looks, the important part is the first part and if you made yours based on the H9800 then you're good to go.
    We currently change the horn adaptors. I was not 100% satisfied with the first hit
    1. pic first hit (a test)
    2. pic currently made adaptors (H9800ish)
    They look similar but perform totally different. See quoted 4313B Post
    Attached Images Attached Images   

  3. #33
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,930
    Quote Originally Posted by Guido View Post
    They look similar but perform totally different.
    That was the point several of us were trying to make when discussing some of the H9800 horn clones made by a few different forum members... a seemingly small change, especially in the throat area, can make quite a difference and the correct geometry of the H9800 is far from simple to create.

    What about the tweeter horn you are using? Isn't it optimized for the K2-S9800s higher tweeter position?


    Widget

  4. #34
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    Quote Originally Posted by Mr. Widget View Post
    What about the tweeter horn you are using? Isn't it optimized for the K2-S9800s higher tweeter position?
    Widget
    It is, but I don't see too many problems. You may also have noticed that the upper horn lip is also not tilted as the original. To be honest, I don't expect to hear much of the supertweeter as it kicks in only at 19kHz. We will see.... and hear!

  5. #35
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    7,969
    That new throat doesn't look right. Take a look at this older thread,

    http://www.audioheritage.org/vbullet...ght=QUICK+4430

    Rob
    Attached Images Attached Images  
    "I could be arguing in my spare time"

  6. #36
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,930
    I was thinking that too... but it could be due to the rendering. A wireframe might be more instructive. I've posted this before along with the .igs data to create it and I assume that is what Guido is using as a starting point, but here is a view that shows that the transitional fillet looks different than Guido's rendering.


    Widget
    Attached Images Attached Images  

  7. #37
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    It will be right in the end

    You need to see it. It can't be showed in pics or rendered CAD drawings. It's a question of the viewing angle.

    Below is original EV2, not mine
    Attached Images Attached Images  

  8. #38
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    Quote Originally Posted by Robh3606 View Post
    That new throat doesn't look right. Take a look at this older thread,

    http://www.audioheritage.org/vbullet...ght=QUICK+4430

    Rob
    No, not wrong.
    Attached Images Attached Images   

  9. #39
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    7,969
    Hello Guido

    That red line doesn't follow the contour, the white line does. That's an Array horn not a 9800. You need a close up of the transition between the throat and the horn. The white lines are the transition in the Array Horn between the outer horn and it shows the 2 piece construction on the throat.

    Rob
    Attached Images Attached Images   
    "I could be arguing in my spare time"

  10. #40
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    Quote Originally Posted by Robh3606 View Post
    Hello Guido That red line doesn't follow the contour, the white line does. That's an Array horn not a 9800. You need a close up of the transition between the throat and the horn. The white lines are the transition in the Array Horn between the outer horn and it shows the 2 piece construction on the throat. Rob
    I know that Rob it was for clarification only as there is no real line in the contour. See the EV2 closeup I posted. Here the line is also not as my red line but looks like my red line (red wine) . Anyway, thank you for participating and trying to help! I'm proud to get you folks back to the forum at least for a few days

  11. #41
    Senior Member Jan Daugaard's Avatar
    Join Date
    Apr 2003
    Location
    Denmark
    Posts
    234
    The adapter is intended to be a parabolic horn, and I know for a fact that the black block is the one half of a parabolic horn, because I did the mathematical modelling and made the CAD drawing that was used to mill it.

    Measurements will show which is the better adapter.

    Squaring the circle (http://en.wikipedia.org/wiki/Quadrature_of_the_circle)
    while retaining a parabolic expansion is anything but trivial,
    and I'm intrigued to know whether my efforts have paid off.
    We will know when Guido has made measurements with the green adapter (measurements made with my adapter are already available in various threads).

  12. #42
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    Quote Originally Posted by Jan Daugaard View Post
    The adapter is evidently a parabolic horn, and I know for a fact that the black block is the one half of a parabolic horn, because I did the mathematical modelling and made the CAD drawing that was used to mill it.
    Measurements will answer the question as to which adapter has the right shape.
    Jan, thank you for participating.
    Nothing wrong with your adapter. I even have a perfect filter for it. I just want to compare it with the original Everest 2 filter and the matching adapter.
    If I have made the comparison we will know if your efforts have paid off.

  13. #43
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    7,969
    I hope you guys nail it. If it works with the Everest Crossover it's a done deal.

    Rob
    "I could be arguing in my spare time"

  14. #44
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506

    Project continues: LF in room response

    This is about the best in room response I ever measured!
    Normal room
    No treatment
    Very insensitive to room modes
    Flat within +/- 3dB down to 10Hz
    101dB SPL

    Reworked EV2 LF1 and LF2 crossover for usage of 1500AL's as worked out here
    http://www.audioheritage.org/vbullet...00-h9900-h4365

    I'll post full schematics when finetuned.
    Attached Images Attached Images  

  15. #45
    Senior Member Hoerninger's Avatar
    Join Date
    Jul 2005
    Location
    Germany
    Posts
    1,908
    Thanks!
    I remember all of those doubts about the bass capabilities of the Everest
    ____________
    Peter

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Jbl Everest Dd66000
    By ronaltronics in forum Lansing Product General Information
    Replies: 34
    Last Post: 06-04-2017, 12:45 PM
  2. EVEREST DD66000
    By Guido in forum Lansing Product General Information
    Replies: 295
    Last Post: 07-19-2009, 03:53 PM
  3. Everest dd66000 vs K2S9800
    By Brian DK in forum General Audio Discussion
    Replies: 2
    Last Post: 08-26-2008, 08:29 AM
  4. Development of the Everest DD66000
    By Jan Daugaard in forum Lansing Product General Information
    Replies: 3
    Last Post: 08-07-2008, 02:06 AM
  5. DD66000 Everest II
    By Techbot in forum System Information
    Replies: 2
    Last Post: 08-30-2006, 01:30 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •