Page 2 of 3 FirstFirst 123 LastLast
Results 16 to 30 of 43

Thread: 900hz Smith Horn for 1.5 Drivers

  1. #16
    Senior Member John W's Avatar
    Join Date
    Jun 2004
    Location
    Renton, WA
    Posts
    593
    Quote Originally Posted by Robh3606 View Post
    Hello John

    Those look great!!! How do you like the 2435's??

    Rob
    The 2435s are excellent. I just hope I can get the most of them.

  2. #17
    Senior Member glen's Avatar
    Join Date
    May 2003
    Location
    Pasadena, Ca.
    Posts
    913
    Beautiful work as always!
    glad they've turned out so well.
    glen

    "Make it sound like dinosaurs eating cars"
    - Nick Lowe, while producing Elvis Costello

  3. #18
    Senior Member
    Join Date
    Mar 2006
    Location
    Melbourne Australia
    Posts
    153
    Conratulations John,

    They look gorgeous- Starts me thinking about growing it to a 2" throat for a 2440/2441. Any Thoughts guys?
    Have Fun - >>> Nessun Dorma - 12 years old <<<
    Best, Joe Alesi

  4. #19
    Senior Member John W's Avatar
    Join Date
    Jun 2004
    Location
    Renton, WA
    Posts
    593
    Quote Originally Posted by Joe Alesi View Post
    Conratulations John,

    They look gorgeous- Starts me thinking about growing it to a 2" throat for a 2440/2441. Any Thoughts guys?
    The 2397 design is already available for 2" drivers. This design is a slight shrinking from the already full grown original.

  5. #20
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    Quote Originally Posted by John W View Post
    The 2397 design is already available for 2" drivers. This design is a slight shrinking from the already full grown original.
    Yes, they were everywhere back then. If it wasn't a Smith it was a Serpentine.

  6. #21
    Senior Member
    Join Date
    Mar 2006
    Location
    Melbourne Australia
    Posts
    153
    Thanks guys--- opps , Back to school. I suppose what I should have said is grow it to a 500 Hz cut off.
    Have Fun - >>> Nessun Dorma - 12 years old <<<
    Best, Joe Alesi

  7. #22
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    500 Hz is a terrible crossover frequency.

  8. #23
    Maron Horonzakz
    Guest
    Giscard...Explain (500hz)

  9. #24
    RIP 2009
    Join Date
    Feb 2004
    Location
    Rohnert Park, CA
    Posts
    3,790
    Quote Originally Posted by Maron Horonzakz View Post
    Giscard...Explain (500hz)
    500hz is right in the middle of the range where much vocal articulation takes place, and it's very hard to get a crossover/driver combination that will transition in that region without affecting things in an unbeneficial way, considering phase changes, dispersion differences, etc. between the drivers at crossover frequency.

    John

  10. #25
    Member jack_bouska's Avatar
    Join Date
    Aug 2004
    Location
    Calgary, AB, Canada
    Posts
    83

    measurments

    Quote Originally Posted by John W View Post
    Here are a few in-room response plots from the horns. The first is the horn only, no filter, with the mic about 1 meter away pointed directly at the mouth of the horn. You can see the response gently rises to about 15k then drops off.
    The second is horn only at a little higher volume level, and the mic about 2 meters away. For some reason this flattens the slight rise.
    The difference in spectral tilt could be caused by one or more of:
    1) nearfield vs. farfield differences, the smith horn mouth is a diffraction slot in the vertical dimension, and you may need to make mesurments (from mouth to mic) at about 5x or 10x the largest dimension of the horn.
    2) early reflections from the floor, or the speaker underneath can lead to dips in the response (mostly a sub 1khz issue)
    3) the mic position in the room, and the measurment distance from the devices will vary the direct vs. reverberant (diffuse) sound ratio, and can alter the spectral tilt, depending on how live or dead your room is.

    Try to make a few (3+) measurments from in and around your seating position, and visually average the various curves to get a better idea of performance. Concentrate on dips, peaks, and trends that are common among the curve families, as these will be associated with the device, rather than the room.

    (nice craftsmanship, by the way)

    Jack

  11. #26
    Senior Member John W's Avatar
    Join Date
    Jun 2004
    Location
    Renton, WA
    Posts
    593
    Thanks Jack,
    Nice to hear from you again. I normally do the final adjustments with the mic in the listening position, but was wondering why they changed as you got closer. I figured it was somethin like you described.

  12. #27
    Junior Member EvilFuzz's Avatar
    Join Date
    Mar 2010
    Location
    RU
    Posts
    19
    John W, maybe you can show the plans of this beauty?))

    Kirill

  13. #28
    Senior Member richluvsound's Avatar
    Join Date
    Dec 2006
    Location
    london england
    Posts
    2,075

    9800 Horn

    The CAD file is http://www.audioheritage.org/vbullet...914#post232914

    I have a pair I'm not using anymore if that works better for you .... Not walnut though; resin .

    Good luck, Richard

  14. #29
    Junior Member EvilFuzz's Avatar
    Join Date
    Mar 2010
    Location
    RU
    Posts
    19
    Hey, many thanks!
    But... "EvilFuzz, you do not have permission to access this page."
    I don't know, whats happened((


    Quote Originally Posted by richluvsound View Post
    The CAD file is http://www.audioheritage.org/vbullet...914#post232914

    I have a pair I'm not using anymore if that works better for you .... Not walnut though; resin .

    Good luck, Richard

  15. #30
    Senior Member
    Join Date
    Oct 2003
    Location
    Texas
    Posts
    1,732
    Quote Originally Posted by EvilFuzz View Post
    Hey, many thanks!
    But... "EvilFuzz, you do not have permission to access this page."
    I don't know, whats happened((
    The file is in a section of the forum that was dedicated to a past private project that was pay to view.

    Name:  H9800.jpg
Views: 82
Size:  37.8 KB
    Name:  H9800 Top.jpg
Views: 81
Size:  31.0 KB


    H9800_CAD.zip

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. DIY 500Hz Smith Horn? Please help me design one!
    By mpaschetto in forum Lansing Product DIY Forum
    Replies: 21
    Last Post: 04-07-2008, 08:54 AM
  2. Iwata Vs Smith horn
    By gerard in forum Lansing Product DIY Forum
    Replies: 20
    Last Post: 11-08-2006, 06:26 AM
  3. 2397 smith horn
    By armsfreeman in forum Lansing Product DIY Forum
    Replies: 11
    Last Post: 05-27-2006, 10:20 AM
  4. Howto info on Smith horn DSH
    By DR Carlson in forum Lansing Product DIY Forum
    Replies: 0
    Last Post: 01-21-2006, 08:48 AM

Posting Permissions

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