Results 1 to 8 of 8

Thread: Jbl 4345 Consensus best passive bi-amp crossover?

  1. #1
    Senior Member
    Join Date
    Jul 2013
    Location
    The Lone Star State
    Posts
    129

    Jbl 4345 Consensus best passive bi-amp crossover?

    The search function for this forum is efficient -- but not selective.

    Is there a 'best' passive bi-amp crossover for the 4345?

    I could spend an entire day on the site and not 'discover' the thread that answers my question. Help please?

    Thank you,

    Greg

  2. #2
    Senior Member Odd's Avatar
    Join Date
    May 2009
    Location
    Oslo, Norway
    Posts
    636
    Use this text in Google search.

    jbl 4345 crossover site:www.audioheritage.org
    43XX (2235-2123-2450-2405-CC 3155)5235-4412-4406-4401-L250-18Ti-L40-S109 Aquarius lV-C38 (030) 305P MkII

  3. #3
    Senior Member BMWCCA's Avatar
    Join Date
    Feb 2006
    Location
    Virginia
    Posts
    6,964
    Completely passive?

    Heather put this reference thread together: http://www.audioheritage.org/vbullet...841#post171841

    That's the cc crossover I'm using. Passive on the top three drivers and requires an active crossover in the path to separate the woofer from the rest, but why would you do it any other way?

    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  4. #4
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,577
    "4313B" did a 4345 build with the 2123 and a large format treble driver. He used the 4355 equivalent crossover.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  5. #5
    Senior Member
    Join Date
    Jul 2013
    Location
    The Lone Star State
    Posts
    129

    Thank you, Phil.

    Quote Originally Posted by BMWCCA View Post
    Completely passive?

    Heather put this reference thread together: http://www.audioheritage.org/vbullet...841#post171841

    That's the cc crossover I'm using. Passive on the top three drivers and requires an active crossover in the path to separate the woofer from the rest, but why would you do it any other way?

    If it's good enough for your 'work of art' avatar speaker, I don't see why oilfield trash like me would attempt to do better. Why indeed?!

    I do have a thread on the General forum on some Clair S4s that I bought in the 'heat of passion'. There's been some good discussion, but I guess I'll probably just build some 43XXs of some type. I'd sure like to know your 'take' on that. One option I didn't mention in that thread, is building two sets of 4345s -- as I have the parts. However, the 2242s don't seem to measure up to the 2245s in the minds of most posters.

    Any thoughts you have are appreciated.

    Greg

  6. #6
    Senior Member BMWCCA's Avatar
    Join Date
    Feb 2006
    Location
    Virginia
    Posts
    6,964
    Quote Originally Posted by cgregory4 View Post
    Any thoughts you have are appreciated.
    I only know enough to be dangerous. I do follow instructions pretty well! I don't reinvent and I'm no electrical engineer.

    However, I have lived in a JBL home for almost 60-years and still own the first JBL I ever heard, the 030 mono system my Dad set out for the Goodwill before I hustled it off the curb and into my closet when I was nine. I think I can appreciate good hi-fi sound and I have over a dozen pair of JBLs to compare and appreciate. I've made basic measurements across the spectrum with my 4345s. I'm confident they're set-up properly and I enjoy them immensely. The crossovers were built by Dave Brink from the schematic listed above. NewZenith here owned them before me and modified them frequently before putting them back to "stock" and selling them to me, nearly six-years ago.

    Maybe some day I could see replacing them with DD6600, at the rate they're depreciating, but then I could also be dead before that opportunity arises, so I think I'll just enjoy what I have, while I can!
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  7. #7
    Senior Member
    Join Date
    Jul 2013
    Location
    The Lone Star State
    Posts
    129

    Recommendation for crossover 'builder'?

    Quote Originally Posted by BMWCCA View Post
    I only know enough to be dangerous. I do follow instructions pretty well! I don't reinvent and I'm no electrical engineer.

    However, I have lived in a JBL home for almost 60-years and still own the first JBL I ever heard, the 030 mono system my Dad set out for the Goodwill before I hustled it off the curb and into my closet when I was nine. I think I can appreciate good hi-fi sound and I have over a dozen pair of JBLs to compare and appreciate. I've made basic measurements across the spectrum with my 4345s. I'm confident they're set-up properly and I enjoy them immensely. The crossovers were built by Dave Brink from the schematic listed above. NewZenith here owned them before me and modified them frequently before putting them back to "stock" and selling them to me, nearly six-years ago.

    Maybe some day I could see replacing them with DD6600, at the rate they're depreciating, but then I could also be dead before that opportunity arises, so I think I'll just enjoy what I have, while I can!
    Does Dave Brink build crossovers for others, or just for his own use? Does anyone know whether Dave, or someone else, would build me a set of the charge-coupled crossovers for my use?

    Thanks for the help.

    Greg

  8. #8
    Senior Member BMWCCA's Avatar
    Join Date
    Feb 2006
    Location
    Virginia
    Posts
    6,964
    Quote Originally Posted by cgregory4 View Post
    Does Dave Brink build crossovers for others, or just for his own use? Does anyone know whether Dave, or someone else, would build me a set of the charge-coupled crossovers for my use?

    Dave was "norealtalent" on this site. My guess is no, but you can try to reach him here: http://www.katzassaudio.com/
    Check this page: http://www.katzassaudio.com/custom.html
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. passive crossover JBL 077
    By nfbertone in forum Lansing Product Technical Help
    Replies: 13
    Last Post: 08-08-2012, 02:06 AM
  2. passive crossover help
    By bottleneck in forum Electronic Crossovers
    Replies: 3
    Last Post: 04-28-2010, 07:37 AM
  3. Need help with passive crossover!!
    By rbrandt73 in forum Lansing Product DIY Forum
    Replies: 3
    Last Post: 07-05-2007, 11:43 AM
  4. Passive crossover JBL
    By alnico in forum Lansing Product General Information
    Replies: 4
    Last Post: 10-06-2004, 08:44 PM

Posting Permissions

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