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Thread: What was the couse with 2234H

  1. #31
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    Fm = Vb = 37.8 hz

    That's about what I got with an impedance run in CLIO.

  2. #32
    Senior Member spkrman57's Avatar
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    High pass cutoff...

    I used parts express plate amp(good enough in the past for my purposes) and set the upper cutoff approx 10:00 on the 40hz to 160hz continuously variable control. I'm guessing around 80hz(?)

    Ron


    Quote Originally Posted by grumpy View Post
    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
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  3. #33
    Senior Member spkrman57's Avatar
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    Please explain the meaning of that result

    Quote Originally Posted by Giskard View Post
    Fm = 37.8 hz

    That's about what I got with an impedance run in CLIO with two 1500AL's
    mounted.
    For my use with 2235's, that figure means its tuned to 37.8hz, right?

    After stuffing one port(wadded up foam - I know it's not perfect - just wanted to hear a change to help me think it out), I installed a slightly smaller ID port and longer. Helped, but not enough to work for me.

    Ron
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  4. #34
    Administrator Robh3606's Avatar
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    Which PE plate amp do you have??? Is yours set for flat??? That's a 40Hz box and it will boom like hell with 2235's especially lying down. You need to tune it lower say 28-30Hz and stand it up. 2235's are punchy compared to Le14's, they don't need that much boundry reinforcement help. In the right box and tuning they can sound damn good. You really want them rolled off a bit depending on where you put them in your room. Like an extended bass alignment.

    Rob

  5. #35
    Member WTPRO's Avatar
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    Hi Ron
    After measuring the driver and vented box tests, use the 'align vented box' button in the TS window to adjust the simulator to the in-box data. Basically this option iterates the simulator till a solution is found where the impedance peaks line up in frequency and amplitude. Its a lot easier and more accurate (IMO) than the old method. Be sure to use the Rem/Xem non linear inductance as well throughout for best results.

    Keith

    PS: Ive met a few LH members here at the CES. If anyone else is at CES, I am in the Venetian San Polo room 3502-3503-3504 booth 404.

  6. #36
    RIP 2011 Zilch's Avatar
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    Hi, Keith.

    Be sure to go hear the new JBL flagship Everest II if you get a chance, and let the forum know what you think of it!

  7. #37
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    Quote Originally Posted by Zilch View Post
    Hi, Keith.

    Be sure to go hear the new JBL flagship Everest II if you get a chance, and let the forum know what you think of it!
    I'm very surprised that you didn't go Zilch. I think it would be a great baseline for you. Providing, of course, that they ended up with a "good" room.
    Quote Originally Posted by WTPRO View Post
    Its a lot easier and more accurate (IMO) than the old method.
    Thank you!

  8. #38
    Member WTPRO's Avatar
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    If things slow down enough today I will try to find the JBL booth and have a look and listen of the Everest. But they dont seem to be listed as JBL. No problem, ... parent company name but I expect there will be multiple booths to hunt down!

    Best regards
    Keith

  9. #39
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  10. #40
    Dis Member mikebake's Avatar
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    Quote Originally Posted by spkrman57 View Post

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


    Ron
    I could probably use a few more! It's a good box, easy to use stock with 2226's. Not looking for VLF, but in their range, it's a useful box for me.

  11. #41
    Senior Member spkrman57's Avatar
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    Mike - Are we talking about 4648's???

    Talk to Giskard as to what he will do with them when he is done.

    I gave them to him to do with as he sees fit once he has finished with them.

    Ron
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  12. #42
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    Right now both are loaded with dual 1500AL's which sound really nice.

  13. #43
    Senior Member spkrman57's Avatar
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    What tuning changes did you make?

    Quote Originally Posted by Giskard View Post
    Right now both are loaded with dual 1500AL's which sound really nice.
    I figure you had to re-port the 4648's for optimum performance!

    Regards, Ron
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  14. #44
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    Quote Originally Posted by spkrman57 View Post
    I figure you had to re-port the 4648's for optimum performance!
    I haven't had time to do much more than stuff one of the ports.

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