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  1. Looking for hybrid of JBL 4312a Control Monitors and Infinity Kappa 7's

    Hi All,

    So recently I embarked on a quest, to reduce the perceived harshness and glare of my beloved JBL 4312a Control Monitors. Through support from different sources, including this forum, I...
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    4312a Control Monitor tweeter upgrade?

    Hi All,

    was there ever a consensus arrived at on beryllium upgrades to the ti tweeter?

    i have a pair of 4312as I am attempting to upgrade.

    thanks,
    brett
  3. Replies
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    6,683

    I have often wondered about DC biasing. But since...

    I have often wondered about DC biasing. But since I have never done any of this sort of work before I would need some serious input from you all. Does the DC biasing just 'precharge' the caps? How...
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    Driver testing

    Thanks for bringing that up. How can I objectively test the drivers, with what tools and what should they measure?

    One woofer was professionally reconned using stock JBL parts. I have several...
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    The little blue caps appear to be ceramic. They...

    The little blue caps appear to be ceramic. They say .01k 250v CVC (or CMC)...hard to make out. From my research that denotes ceramic, and from further research ceramic is more likely to be...
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    Thanks for the reply! Love these speakers but...

    Thanks for the reply!

    Love these speakers but they are definitely midrange forward and tend to be harsh in the upper mids for sure. So I am recapping them with more laid back caps, with tighter...
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    Thanks for the reply! I unfortunately do not...

    Thanks for the reply! I unfortunately do not understand, does this mean the tweeter is out of phase? Or none of the drivers are out of phase?

    sorry. Thanks!
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    Phase?

    ...also....

    Does anyone know if the tweeter and midrange are wired out of phase with the woofer or is it just the midrange that's out of phase?
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    Thanks!

    Could your recommend where I can find all the replacement parts I might need and a good soldering iron? Also what gear do I need to test the speakers? Tone genrator? Some sort of impedance tester?...
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    6,683

    Are These 4312a Control Monitor Crossovers?

    Hello,

    Bought a second set of what I think are JBL 4312a Control Monitor Crossovers but not sure the item was properly marked. I figured if I was going to attempt my first ever hands-on upgrade...
  11. JBL 4312a Control Monitors--harsh frequency coming off woofers

    Hi All,

    I am a proud owner of a nice pair of JBL 4312a control monitors....and a proud owner of 4408's and 4406's as well. I love all of them but really dig the 4312a's. However I have to say they...
  12. Replies
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    8,955

    JBL 4312a harsh frequency coming off the woofers?

    Hi All,

    I am a proud owner of a nice pair of JBL 4312a control monitors....and a proud owner of 4408's and 4406's as well. I love all of them but really dig the 4312a's. However I have to say they...
  13. Replies
    7
    Views
    3,703

    JBL 4312a harsh frequency coming off the woofers?

    Hi All,

    I am a proud owner of a nice pair of JBL 4312a control monitors....and a proud owner of 4408's and 4406's as well. I love all of them but really dig the 4312a's. However I have to say they...
  14. Replies
    20
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    11,690

    Will pay to have someone build a biased crossover for my 4406's!!

    Hi all,

    i posted to this forum back in 2012 my first post.

    i just love my 4406's for me they perform better in my room than my 4312's.

    i am dying to hear one you pros out there help take...
  15. Thread: 4406 modding

    by brettMc
    Replies
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    5,396

    JBL 4406 'charge coupled network' --need someone to build one for me

    Hi All,

    This is my first post so I will be brief. I purchased a 'new/old still in the box' pair of JBL 4406's. I just love'em! But I keep seeing random mentions that they even sound better if you...
  16. Replies
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    6,084

    JBL 4406 'charge coupled network' --need someone to build one for me

    Hi All,

    This is my first post so I will be brief. I purchased a 'new/old still in the box' pair of JBL 4406's. I just love'em! But I keep seeing random mentions that they even sound better if you...
  17. JBL 4406 'charge coupled network' --need someone to build one for me

    Hi All,

    This is my first post so I will be brief. I purchased a 'new/old still in the box' pair of JBL 4406's. I just love'em! But I keep seeing random mentions that they even sound better if...
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