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Thread: Pieceing together a JBL 4350 build in Australia

  1. #1
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    Pieceing together a JBL 4350 build in Australia

    Hi All

    After selling my Factory 4350A's about a year ago I ended up purchasing an empty pair of 4350 clone cabinets at an auction. Also purchased at the auction were 3x pairs of 2235H's, 1x pair 2231As and a pair of 2450SL with, I think, 2332 horns. I picked up a fair bit of other interesting JBL gear but these are the only drivers pertinent to this proposed build.

    Given the cabinets aren't factory I have no problem trying alternate drivers in this system. Obviously the 2235H's will come in handy and I will continue to use the 2202 mid-bass unit but I am also wanting to use the 2450SL in place of the horns. A few questions arise from this, how can I get the 2311 to mount on the 1.5" driver? I can't see any factory adapters or aftermarket varieties that can achieve this. If I can't use the 2311 I may consider fitting the 2332 horn into the cabinet. Thoughts on this?

    Perfect world I would want to drive these completely passive, active 4 or 3-way is completely out of the question and is of no interest. I have a Bryston 10B and a Deqx so I am happy to biamp as done in the legacy system. I assume some crossover work would need to be done for the 2450SL's to blend seamlessly. Any guidance on this?

    Worst case I will just buy a pair of 2440/2441/2445 if this is all too complicated for me.

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    Senior Member jbl4ever's Avatar
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    Hello Kelossus, a company here in the states sell the adaptor needed for the 1.5Ē to 2Ē. The companyís name is US Speaker. It is made by P Audio which you may be able to find a distributor by you.
    The part no. Is PC 5038 and sells for $39.95. Hope this helps and good luck

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    Senior Member 1audiohack's Avatar
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    Do you have a lathe? Are you into fabrication?

    I cut a pair of 2307ís at the point where the throat was just under 1.5Ē and welded a new flanges on them for 2450SLís.

    I thought I posted a pic or two but donít recall where.

    The easiest route would be regular old 2450ís on the 2311. Light and the same package size of the old 2440-41ís.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

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    Quote Originally Posted by 1audiohack View Post
    Do you have a lathe? Are you into fabrication?

    I cut a pair of 2307ís at the point where the throat was just under 1.5Ē and welded a new flanges on them for 2450SLís.

    I thought I posted a pic or two but donít recall where.

    The easiest route would be regular old 2450ís on the 2311. Light and the same package size of the old 2440-41ís.

    Barry.
    Will the SL diaphragms fit in them?

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    Is this a crazy idea? Flipping the speakers 90 degrees and using the other side to mount the 2332?

    The biggest issue I had with the 4350's was them being too close together so rotating them would help move them a little further apart.

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    Senior Member Odd's Avatar
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    Quote Originally Posted by kelossus View Post
    Will the SL diaphragms fit in them?
    Hi, Surely, this is what I did with my 2450, I installed the 2451 dia because I much prefer the aquapla's diaphragm.
    JBL2450, 2450SL or 2451 have the same motor.
    Music is emotion.

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    If I got a 2445/2446 and put a 16 ohm SL diaphragm in it, would I need to change the original 4355 crossover to accommodate for it?

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    Member macsic's Avatar
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    Quote Originally Posted by kelossus View Post
    If I got a 2445/2446 and put a 16 ohm SL diaphragm in it, would I need to change the original 4355 crossover to accommodate for it?
    A passive crossover is made for specific drivers and in addition the impedance does not match, the result will not be optimal. IMHO I would keep the 2450SL which is a great driver and look for a good DSP to replace the old passive crossover.

    Music is emotion.

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    To keep this simple I think I will keep the speakers as close to original as possible. If I source a pair of 2450 with the 2" exit and install 2441 diaphragms, will I need to make any changes to the stock 4355 network?

    Also, as I intend to use the cabinets flipped 90 degrees would mounting the drivers in a vertical line above the mid-bass be the way to go?

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    Senior Member 1audiohack's Avatar
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    The 2450 driver with a D16R2441 diaphragm should perform just like the original 2441.

    I doubt you could hear any difference with the 2405 on the side verses the top on a 4355. The 2405 just augments the 2441. In the 4350 where the 2440 has no output above about 9KHz, and the 2405 is on hard, maybe.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

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    Quote Originally Posted by 1audiohack View Post
    The 2450 driver with a D16R2441 diaphragm should perform just like the original 2441.

    I doubt you could hear any difference with the 2405 on the side verses the top on a 4355. The 2405 just augments the 2441. In the 4350 where the 2440 has no output above about 9KHz, and the 2405 is on hard, maybe.

    Barry.
    Thanks mate, I just figured if I were going to drill new mounting holes for the drivers I might vertically align them when the cabinets are rotated.

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    Member macsic's Avatar
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    Quote Originally Posted by 1audiohack View Post
    The 2450 driver with a D16R2441 diaphragm should perform just like the original 2441.

    I doubt you could hear any difference with the 2405 on the side verses the top on a 4355. The 2405 just augments the 2441. In the 4350 where the 2440 has no output above about 9KHz, and the 2405 is on hard, maybe.

    Barry.
    Hi Barry,

    Tell me did I miss something? If I go to the specs for the 4355, the drivers are 8 ohms, no?
    Music is emotion.

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    Senior Member 1audiohack's Avatar
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    Quote Originally Posted by macsic View Post
    Hi Barry,

    Tell me did I miss something? If I go to the specs for the 4355, the drivers are 8 ohms, no?
    I have never seen an 8 Ohm 2441. I have always assumed that they didnít exist. I could very well be wrong! I suppose it deserves a look.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

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    JBL never made an 8 ohm 2441 diaphragm that I'm aware of. The closest one could get is the Radian clone 8 ohm version which actually sounds better the original JBL if you don't need every last bit of HF extension. I don't know why an 8 ohm would be beneficial when making a 4350 clone however, it would just require a lot more reinvention of any passive crossover and be a non-issue if you were tri-amping.

    Quote Originally Posted by 1audiohack View Post
    I have never seen an 8 Ohm 2441. I have always assumed that they didnít exist. I could very well be wrong! I suppose it deserves a look.

    Barry.

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