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Thread: What was the couse with 2234H

  1. #16
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    Giskard,

    Your explanations of various woofer comos is very interesting.

    Have you had any experience with the imaginary tuning concept featured in some of the new JBL Statement speaker?

    Ian

  2. #17
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    Ian, LOL

    No comment Or should I say "only in my vivid imagination"?

    BTW what are comos?

  3. #18
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    Originally posted by Giskard
    Installing the 51629 mass ring in the 2242H will result in the following TS shifts:

    .....

    Mathematically, adding the mass ring looks to be a reasonably viable endeavor.
    Yeah but after looking at it further it isn't. Don't add mass to the 2242H.
    G.T. confirmed it would be a bad idea. They tried it and it wasn't all that great.

  4. #19
    Senior Member spkrman57's Avatar
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    Searched, but could not find a answer to a hypothetical situation.

    Has anyone actually used a pair of 2235's in a 4648 cabinet tuned for best performance?

    I have 4648 cabs and if it can be done without losing much VLF I would be spared getting cabinets built for sub duty(in the home environment).

    I believe the 4648 is 7.99 cu ft per someones post in the past.

    Please feel free to comment here on this!

    Thanks, Ron
    JBL Pro for home use!

  5. #20
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    Quote Originally Posted by spkrman57 View Post
    Has anyone actually used a pair of 2235's in a 4868 cabinet tuned for best performance?

    I have 4868 cabs and if it can be done without losing much VLF I would be spared getting cabinets built for sub duty(in the home environment).

    I believe the 4868 is 7.99 cu ft per someones post in the past.

    Please feel free to comment here on this!

    Thanks, Ron
    If you have 4868's and 2235H's then you can bolt them together, tune them and tell us how it all works out! I'm sure 2234H's would work fine.

  6. #21
    Senior Member spkrman57's Avatar
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    That may happen next week.

    Another option is to install (1) 2235 per 4648(I have a few of them).

    With a single 2235 per 4648 I might try sealed and ported to hear the differences. With almost 8 cu ft per cabinet I will keep the power levels down.

    With the dual 2235's per 4648, I am guessing the tuning will be slightly higher and power handling a little bit better. I am guessing the VLF extension with dual 2235's to be approx 5 hz higher than the optimum 2235 tuning in 5 cu ft cabs.

    I hope to post some answers next week. I have to remove the (4) 4648's from their duty as a box spring/frame for my bed. I just did not have anywhere to store them lately.

    Thanks, Ron
    JBL Pro for home use!

  7. #22
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    Quote Originally Posted by spkrman57 View Post
    I have to remove the (4) 4648's from their duty as a box spring/frame for my bed.
    Ok... now I know all you JBL guys are sick! Any doubt has been removed once and for all!
    Thanks for sharing.

  8. #23
    Senior Member spkrman57's Avatar
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    Forgive my limited knowledge here....

    According to WinIsd, (2) 2235's in 7.9 cu ft using only (1) port of 5" wide and 4.385" long would be approximately the tuning that would work best.

    The 4648 cabinet uses (2) ports that size. I would close one of them with a pipe tester(Zilch type) and will measure the results.

    The 4648 is approx 7.99 cu ft according to apost I read back sometime.

    And yes, I will have to put my mattress on the floor to work on this project!

    I will have a few empty 4648's available to JBL forum members if someone wants. I don't have the room for them all anymore.

    Ron
    JBL Pro for home use!

  9. #24
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    Quote Originally Posted by spkrman57 View Post
    According to WinIsd, (2) 2235's in 7.9 cu ft using only (1) port of 5" wide and 4.385" long would be approximately the tuning that would work best.

    The 4648 cabinet uses (2) ports that size. I would close one of them with a pipe tester(Zilch type) and will measure the results.

    The 4648 is approx 7.99 cu ft according to apost I read back sometime.

    And yes, I will have to put my mattress on the floor to work on this project!

    I will have a few empty 4648's available to JBL forum members if someone wants. I don't have the room for them all anymore.

    Ron
    I might want one of them for an interim fix...
    Wait... I might want two temporarily. What say you?

  10. #25
    Senior Member spkrman57's Avatar
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    You have (2) 4648's coming your way....

    Thursday still look good?

    I actually will be able to use the space if you borrow them for some time.

    When they leave your place, I just hope to find a home for them with someone on the forum who can use them.

    I'm tired of trying to get $$$ for everthing I own. Just make someone happy instead!

    Just found out this last weekend that a friend of mine might sell me a pair(loaded with 2226J's) for a reasonable price. So I will have TOO many to keep anyways!

    Ron
    JBL Pro for home use!

  11. #26
    Senior Member spkrman57's Avatar
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    Interesting reading while searching posts...

    http://audioheritage.org/vbulletin/s...highlight=2235

    I was reading to see how many different ways 2235's have been used by forum members. I was especially interested in seeing what a sealed cabinet would do.

    After exhausting the searches(2235), I found only that using a 5 cu ft box sealed was not best.

    If I went with that large sealed and did not gain anything compared to ported(at least that's the result I came up with), then using a 5 cu ft ported would be best end result.

    So my search to use sealed cabs for the 2235 seems to be concluded with no good results.

    I thought maybe the 4648's in sealed mode(single 2235 per cab) might have been persuable. After reading(eyes are tired now), I see that there is no benefit in that direction.

    Ron
    JBL Pro for home use!

  12. #27
    Senior Member spkrman57's Avatar
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    Bummer!

    Went and installed the pair of 2235H's in the 4648 cabinet today.

    Tried playing with the ports before I go and buy Plumbers tester (5.25").

    I see no need to buy them. I will go back to using a pair of L200 cabs and call it a day.

    The results of my experiment can be described easily:

    BOOM BOOM BOOM

    Nowhere near the finesse bass of the LE14H-1's, even when I used them in L55 cabinets(2 cu ft).

    Experiment completed and done with.

    Just goes to show that Winisd is not always correct with the sims!!!

    Regards, Ron


    Quote Originally Posted by Giskard View Post
    If you have 4868's and 2235H's then you can bolt them together, tune them and tell us how it all works out! I'm sure 2234H's would work fine.
    JBL Pro for home use!

  13. #28
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    I'm not terribly surprised. You need to use your WT2 to measure what Vb really is though.

  14. #29
    Senior Member grumpy's Avatar
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    Does appear that 2234's would do better in this case... I still have to put a set of similarly
    sized boxes together to set up a 4435 bottom end, so I'd hate to see this thread go kaput.
    Ron, did you actually try blocking one of the ports? Where did you set your upper cut off
    (or did you run them wide-open?)

    -grumpy

  15. #30
    Senior Member spkrman57's Avatar
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    I'm not sure about everything WT2 does...

    Here is what I got with both 2235's installed and both ports open to start:

    Fsb = 19.5hz
    alpha = 3
    Ha = 1.939
    Fm = 37.8 hz

    I did not test after stuffing the ports(poorly just to get indication of change)

    One other bad thing I did was having the cabinet horizontal on the floor.

    I just gave up on this since I have a pair of L200 cabinets in the garage and I know it will be easier to work with.

    Grumpy - I did stuff one of the ports, and then fitted a longer port in the remaining one. I think your 2234's will do just fine with retuning the ports!

    Overall, I think the LE14H-1 just walks all over the 2235H's, but just my opinion though!

    Regards, Ron
    JBL Pro for home use!

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