+ Reply to Thread
Page 1 of 3 123 LastLast
Results 1 to 15 of 36

Thread: Charge Coupled Crossover

  1. #1
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    1,503

    Charge Coupled Crossover

    Where does one go for an education on charge coupled crossovers?

    What theory describes the benefits?

    I want to start with a replacement project for my 3106's. A very simple crossover indeed.

    I saw Zilch respond to one post on 3105's with "Build one your for $25, charge coupled for $10 more."

    Cool, where do I start?

    Thank you!

  2. #2
    Senior Member
    Join Date
    Feb 2004
    Location
    SoCal, USA
    Posts
    8,888
    Read this thread:

    http://www.audioheritage.org/vbullet...ead.php?t=3555

    Focus on post #6.

  3. #3
    Senior Member
    Join Date
    Feb 2004
    Location
    SoCal, USA
    Posts
    8,888
    Also, rather than retyping Ian's list, look at his post here with linked references back to these forums:

    http://www.diyaudio.com/forums/showt...threadid=87885

  4. #4
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    1,503
    Thanks T.D.

    That Gregory Timbers is one smart cookie!

    Those three pages explain it perfectly.

    Off to the electonics store, again.

  5. #5
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,358
    Quote Originally Posted by 1audiohack View Post
    That Gregory Timbers is one smart cookie!
    Ed Meitner passed the idea on to Greg and Greg incorporated the idea into his statement systems. This is one of two topics that should have stayed in the private forums due to it causing unnecessary fretting and confusion.

  6. #6
    Registered User MJC's Avatar
    Join Date
    Apr 2003
    Location
    Nevada
    Posts
    800
    Quote Originally Posted by 4313B View Post
    Ed Meitner passed the idea on to Greg and Greg incorporated the idea into his statement systems. This is one of two topics that should have stayed in the private forums due to it causing unnecessary fretting and confusion.
    What confusion? It is the act of taking any XO, removing the original caps and replacing them with Solen polyproplyene caps of twice the size and always in pairs. Then connecting the positive side of a 9v alkaline battery to the common point of all pairs.
    The result is a far superior set of speakers. The amount of money spent on CC networks, I spent about $150/ea to build completely new XOs, is well worth it.

  7. #7
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,358
    Quote Originally Posted by MJC View Post
    What confusion? It is the act of taking any XO, removing the original caps and replacing them with Solen polyproplyene caps of twice the size and always in pairs. Then connecting the positive side of a 9v alkaline battery to the common point of all pairs.
    Yep! My point exactly!

    The amount of posting it generated though was pretty funny to some I guess.

    some cc networks in progress
    Attached Images Attached Images  

  8. #8
    Senior Member
    Join Date
    Apr 2003
    Location
    Toronto
    Posts
    3,743
    Quote Originally Posted by MJC
    What confusion? It is the act of taking any XO, removing the original caps and replacing them with Solen polyproplyene caps of twice the size and always in pairs. Then connecting the positive side of a 9v alkaline battery to the common point of all pairs.
    The result is a far superior set of speakers. The amount of money spent on CC networks, I spent about $150/ea to build completely new XOs, is well worth it.
    - You forgot the 2 to 5 meg isolation resistor .
    - FWIW, these batteries do represent fairly low impedance paths back to ground within the crossover circuit.
    - If one omits this resistor / one then creates a lowpass circuit with an F3 determined by the cap values being used , as well as the working impedance for that portion of the circuit .

    Quote Originally Posted by 4313B
    snip,,,, This is one of two topics that should have stayed in the private forums ,,,,,, snip
    - The "cat getting out of the bag" preceeded the "May Forum" by a good nine months, if that's what you're referring to .
    - Once Don McR posted those first links to Harmans' tech papers ( just previous to this current forum I believe ), questions started to be asked ( with all the attendant fretting following in due course )

    - & Yes, this sort of stuff has definately kept me amused for the last 4 1/2 years .



  9. #9
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,358
    Quote Originally Posted by Earl K View Post
    - This sort of stuff has definately kept me amused for the last 4 1/2 years .
    It just made me cranky. A few others I'd rather not see cranky too. Oh well.

  10. #10
    Senior Member richluvsound's Avatar
    Join Date
    Dec 2006
    Location
    london england
    Posts
    1,961

    STUNNING

    They look as good as they sound ,and worth every penny IMHO. They move 30 year components into the 21st century.

    GT, 4313b , Guido , and the Aussie guru Ian The true masters of the black art. They dont charge enough considering the years of experience it takes to
    build these things.

    Rich

  11. #11
    Registered User MJC's Avatar
    Join Date
    Apr 2003
    Location
    Nevada
    Posts
    800
    Quote Originally Posted by Earl K View Post
    - You forgot the 2 to 5 meg isolation resistor .
    - FWIW, these batteries do represent fairly low impedance paths back to ground within the crossover circuit.
    - If one omits this resistor / one create a lowpass circuit with an F3 determined by the cap values being used , as well as the working impedance for that portion of the circuit .
    Yes, as a matter of fact I did, how silly of me.

  12. #12
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,358
    Quote Originally Posted by MJC View Post
    Yes, as a matter of fact I did, how silly of me.
    Um.. You forgot to mention them? Or you forgot to use them?

  13. #13
    Senior Member
    Join Date
    Apr 2003
    Location
    Toronto
    Posts
    3,743
    Quote Originally Posted by 4313B
    some cc networks in progress
    Nice.


  14. #14
    Registered User MJC's Avatar
    Join Date
    Apr 2003
    Location
    Nevada
    Posts
    800
    Quote Originally Posted by 4313B View Post
    Um.. You forgot to mention them? Or you forgot to use them?
    I used 'em, just forgot to mention them in that post.
    Having the full applied 9v going straight to the caps, don't think I'd want that

  15. #15
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,358
    Quote Originally Posted by richluvsound View Post
    They move 30 year components into the 21st century.
    Well, I would have to agree. I most recently finished six months with 4355's and I am sufficiently impressed with the results.

    G.T. started all this way back when he modified a few pairs for some friends with 250Ti's. He did it the hard way and just modified the existing networks and we discussed that complete nightmare at length.

    The goal has been to make them as painless as possible to bolt in place of the stock networks as well as to make them reasonably easy to ship. A top board goes in place to protect the caps and coils.

+ Reply to Thread

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Charge Coupled 250TI
    By jims in forum Lansing Product DIY Forum
    Replies: 4
    Last Post: 11-13-2005, 03:49 PM
  2. Charge coupled 3113B
    By hector.murray in forum Lansing Product Technical Help
    Replies: 7
    Last Post: 05-01-2005, 10:38 AM
  3. Charge Coupled Networks for L212?
    By MJC in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 01-05-2005, 09:10 PM
  4. Charge coupled networks?
    By Claus K in forum Lansing Product Technical Help
    Replies: 2
    Last Post: 03-01-2004, 03:45 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