Page 3 of 5 FirstFirst 12345 LastLast
Results 31 to 45 of 69

Thread: Charge Coupled Crossover

  1. #31
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,875
    You can build your cc networks and leave the batteries out for a few weeks while you get accustomed to how the new networks sound. Then install the batteries.

    Or you can just compare two sets of loudspeakers like a few guys did with their 18Ti's, 120Ti's, and 250Ti's.

  2. #32
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    2,227
    Wow this subject has been a lot of fun!

    I have ordered the components to build a pair identical to the 3106, the "B" pair, and a "C"pair, charge coupled. Then I will run them against the "A" pair.

    The reason for the "B" pair is for control, it would not be objective to test against my old 3106's with their old caps and all. I will also exlude the L-pad with fixed value resistors. I will of course A B C test.

    Its probable that small improvements would make themselves more evident in the higher order more complex networks, this is just where I chose to begin this journey.

    I just bought a new TEF 25 PRO kit with all the extras for component testing. It is even supposed to be able to measure and display Heyser Spiral plots on capacitors, and inductors. A lot to learn here to get good data! $3500.00 in red pills! Its never gonna be the same from now on.

    So I hope to be able to measure and post the results, but in the end, its all what ya hear.

    Thanks for all the input. Keep up the fight, ha ha.

  3. #33
    Member
    Join Date
    Sep 2005
    Location
    Elmer, N.J.
    Posts
    54
    Well I'm almost ready to make the plunge to Charge-coupled for my L300's. You guys really think it makes all the difference huh??

  4. #34
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    2,227
    I really don't know,,, yet. I doubt it makes ALL the difference, however performance is why I love JBL.

    They really are well built hotrods, hence the romance most of us of feel toward them.

    Keeping them running, and improving if and what we can is the never ending adventure.

  5. #35
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,875
    Quote Originally Posted by Domino View Post
    You guys really think it makes all the difference huh??
    JBL has used this charge-coupled technology in many of their TOTL loudspeakers for years now. We have the option to apply this technology to our older loudspeaker systems. It makes for a very nice improvement that many people enjoy.

    Back when JBL started using bypass capacitors in many of their systems we applied that technology to our older JBL's and that made for a very nice improvement.

  6. #36
    Senior Member Ian Mackenzie's Avatar
    Join Date
    Apr 2003
    Location
    The Tardis
    Posts
    6,238
    Quote Originally Posted by Domino View Post
    I have a pair of L300's that I'm considering charge-coupling the crossovers. Analyzing the charge-coupled crossover schematics it seems to me if you remove the battery voltage the crossover reverts to the usual passive unit so an A/B listening comparison should be very easy just by putting a switch in the battery line. Has anyone tried this?

    Domino,

    Unfortunately it not that simple. The capacitors will hold their charge and the effect on the dieletric will rermain for a period of time. The same holds for connection of the battery. Allow several days for the effect of the battery.There is information somewhere in the library on "how" it works.

  7. #37
    Junior Member rbnjr's Avatar
    Join Date
    Nov 2014
    Location
    mukilteo wa
    Posts
    26

    IN progress

    Quote Originally Posted by Earl K View Post
    Nice.

    Are you still building these networks?

  8. #38
    Senior Member
    Join Date
    Apr 2003
    Location
    Richmond Hill, Ont.
    Posts
    3,969
    Quote Originally Posted by rbnjr View Post
    Are you still building these networks?
    No!



    I have never built dc-biased networks for others ( though I do use them and very much appreciate them ) .

    The above picture ( that you omitted ) were of some CCed networks that were under construction by LHF member, 4313B.


  9. #39
    Senior Member ivica's Avatar
    Join Date
    Jan 2008
    Location
    serbia
    Posts
    1,329
    Quote Originally Posted by Earl K View Post
    No!



    I have never built dc-biased networks for others ( though I do use them and very much appreciate them ) .

    The above picture ( that you omitted ) were of some CCed networks that were under construction by LHF member, 4313B.

    Ohoooo,
    what a nice picture

    ivica

  10. #40
    Senior Member tjm001's Avatar
    Join Date
    Jan 2015
    Location
    Potomac Falls, Virginia, USA
    Posts
    141
    Quote Originally Posted by Earl K View Post
    No!



    I have never built dc-biased networks for others ( though I do use them and very much appreciate them ) .

    The above picture ( that you omitted ) were of some CCed networks that were under construction by LHF member, 4313B.

    What are those 6 posts on each board? Is that for mounting or for some type of terminal? Thanks.
    Tom

  11. #41
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    4,881
    Standoffs, presumably for mounting to a surface (perhaps plexiglas/perspex for show) or to the cab.

  12. #42
    Senior Member tjm001's Avatar
    Join Date
    Jan 2015
    Location
    Potomac Falls, Virginia, USA
    Posts
    141
    Quote Originally Posted by grumpy View Post
    Standoffs, presumably for mounting to a surface (perhaps plexiglas/perspex for show) or to the cab.
    Thanks Grumpy. How'd you get that handle? You can't possibly be as grumpy as I am known to be!
    Tom

  13. #43
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,875
    The standoffs are for the boards containing the second half of the networks.
    Attached Images Attached Images  

  14. #44
    Senior Member tjm001's Avatar
    Join Date
    Jan 2015
    Location
    Potomac Falls, Virginia, USA
    Posts
    141
    Quote Originally Posted by 4313B View Post
    The standoffs are for the boards containing the second half of the networks.
    Wow! That's an awesome layout. The epitome of neatness. Makes my crossovers look like a bucket of worms Thanks.
    Tom

  15. #45
    Junior Member
    Join Date
    Mar 2015
    Location
    Kennett Square, PA
    Posts
    27
    Quote Originally Posted by 4313B View Post
    The standoffs are for the boards containing the second half of the networks.
    I thought I would share my build of a CC 3155 network that went into my 4355's. All wiring reverse side. It is neat on that side as well. Entire X-over assembly was mounted to rear of cabinet with standoffs. Schematic and design courtesy of G. Timbers and Giskard.
    Name:  IMG_2666.jpg
Views: 272
Size:  148.0 KBName:  IMG_2668.jpg
Views: 278
Size:  136.0 KBName:  IMG_2669.jpg
Views: 283
Size:  148.0 KBName:  IMG_2670.jpg
Views: 285
Size:  126.4 KBName:  IMG_2671.jpg
Views: 280
Size:  153.4 KB

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, 04:49 PM
  2. Charge coupled 3113B
    By hector.murray in forum Lansing Product Technical Help
    Replies: 7
    Last Post: 05-01-2005, 11:38 AM
  3. Charge Coupled Networks for L212?
    By MJC in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 01-05-2005, 10:10 PM
  4. Charge coupled networks?
    By Claus K in forum Lansing Product Technical Help
    Replies: 2
    Last Post: 03-01-2004, 04:45 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
  •