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Thread: Charge Coupled Crossover

  1. #31
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    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
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    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
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    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
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    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
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    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
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    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.

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