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Thread: New Studio Sub 18

  1. #1
    Senior Member Valentin's Avatar
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    New Studio Sub 18

    As expected for some time a new studio Sub has been done from the all mighty 2269h woofer
    it is nice to see it come out

    it is a big box 10.5 aprox cubic feet 300 liter internal volume

    back to basics
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  2. #2
    Senior Member Ed Zeppeli's Avatar
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    I like the industrial appearance. Especially the screwed in ports. All business. I want some! I wonder if they're available aftermarket?


    Warren
    DIY Array, 2242 sub, 4408, 4208, Control 8SR, E120 Guitar cab, Control 1, LSR305.

  3. #3
    Senior Member baldrick's Avatar
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    It really didn't look that big but I see you are correct, I imagined it was aprox 8 cu ft.

    I wonder why the box is that big, especially since the 2269H also are used in smaller cinema boxes with lower tuning (-10db@18hz)

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    Senior Member Valentin's Avatar
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    Quote Originally Posted by baldrick View Post
    It really didn't look that big but I see you are correct, I imagined it was aprox 8 cu ft.

    I wonder why the box is that big, especially since the 2269H also are used in smaller cinema boxes with lower tuning (-10db@18hz)
    it must be for fiscal reasons to get high output at very low frequency
    big boxes are a hard sell on less it fully justified by performance

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    Senior Member audiomagnate's Avatar
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    Quote Originally Posted by Ed Zeppeli View Post
    I like the industrial appearance. Especially the screwed in ports. All business. I want some! I wonder if they're available aftermarket?


    Warren
    Don't know about aftermarket but there's one here:
    http://www.ebay.com/itm/JBL-2269H-Us...4AAOSwLVZV302V

    Maybe it's time to upgrade my IB.

  6. #6
    Senior Member Ed Zeppeli's Avatar
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    Quote Originally Posted by audiomagnate View Post
    Don't know about aftermarket but there's one here:
    http://www.ebay.com/itm/JBL-2269H-Us...4AAOSwLVZV302V

    Maybe it's time to upgrade my IB.
    Cheers! I was actually just referring to the flared ports for the DIY guys.
    DIY Array, 2242 sub, 4408, 4208, Control 8SR, E120 Guitar cab, Control 1, LSR305.

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    Quote Originally Posted by audiomagnate View Post
    Don't know about aftermarket but there's one here:
    http://www.ebay.com/itm/JBL-2269H-Us...4AAOSwLVZV302V

    Maybe it's time to upgrade my IB.
    I was quoted $1099 for a new one. Wonder what it would do in a B460 cabinet as a 2245 upgrade....

  8. #8
    Senior Member audiomagnate's Avatar
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    Quote Originally Posted by dprice View Post
    I was quoted $1099 for a new one. Wonder what it would do in a B460 cabinet as a 2245 upgrade....
    That's around 8 cubic feet IIRC. I bet it would be a significant upgrade.

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    I have a question regarding the SUB18 I hope someone can help me with.

    The sensitivity is rated to 92db@1w. If I see the "installation version" which uses 2269h as well, its rated at 96db@1w (http://www.jblpro.com/www/products/i...8#.V-PmT_mLRhF)

    Do you know why there is such a difference in specs? 4db lower sensitivity require more than double the amplifier power, so it's a large difference.

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    I guess it is a modified cone/suspension, because it goes lower. A bit like the Revel sub (with a 2269H motor) modified cone/suspension...

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    Quote Originally Posted by maxserg View Post
    I guess it is a modified cone/suspension, because it goes lower. A bit like the Revel sub (with a 2269H motor) modified cone/suspension...
    Ok, I would have guessed that the lower extension was caused by different enclosure tuning. In my mind there would be some manufacturing overhead by using multiple versions of the 2269H.

  12. #12
    Senior Member pos's Avatar
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    92dB is probably the sensitivity of the 2269H in the LF range.

    Think of the 2242H vs 2245H: the 2242H is supposed to have a higher sensitivity, but LF sensitivity is about the same as the 2245H and it only starts to rise above that range.
    When used in a 4645 variant with the correct EQ settings (cutting that midrange boost) both the 2245 and 2242 can be considered as having the same sensitivity.

  13. #13
    Senior Member ivica's Avatar
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    JBL 2269 'image' influence

    Quote Originally Posted by Jonas_h View Post
    I have a question regarding the SUB18 I hope someone can help me with.

    The sensitivity is rated to 92db@1w. If I see the "installation version" which uses 2269h as well, its rated at 96db@1w (http://www.jblpro.com/www/products/i...8#.V-PmT_mLRhF)

    Do you know why there is such a difference in specs? 4db lower sensitivity require more than double the amplifier power, so it's a large difference.
    Hi Jonas_h,

    I can imagine that JBL would expect that such speaker would be placed near or on the floor, so the reflected sound from the floor surface would behave almost as another driver adding mentioned acoustic level of sound.

    regards
    ivica

  14. #14
    Senior Member Ed Zeppeli's Avatar
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    Quote Originally Posted by pos View Post
    92dB is probably the sensitivity of the 2269H in the LF range.

    Think of the 2242H vs 2245H: the 2242H is supposed to have a higher sensitivity, but LF sensitivity is about the same as the 2245H and it only starts to rise above that range.
    When used in a 4645 variant with the correct EQ settings (cutting that midrange boost) both the 2245 and 2242 can be considered as having the same sensitivity.
    Does this make sense given that both are subs? Why would one differ from another if they're both meant for VLF?

    Quote Originally Posted by ivica View Post
    Hi Jonas_h,

    I can imagine that JBL would expect that such speaker would be placed near or on the floor, so the reflected sound from the floor surface would behave almost as another driver adding mentioned acoustic level of sound.

    regards
    ivica
    Does JBL include boundary reinforcement in sensitivity specs normally?
    DIY Array, 2242 sub, 4408, 4208, Control 8SR, E120 Guitar cab, Control 1, LSR305.

  15. #15
    Senior Member pos's Avatar
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    Quote Originally Posted by Ed Zeppeli View Post
    Does this make sense given that both are subs? Why would one differ from another if they're both meant for VLF?
    I suppose it depends on what you call VLF, and also what you call sensitivity (can be at lowest impedance, at a given reference frequency, on average in a given range, 2Pi vs 4Pi, etc.).

    example : http://www.jblpro.com/www/products/c...c#.V-QU-jURm5I
    50 Hz to 500 Hz; 99 dB, 1W @ 1m
    40 Hz to 100 Hz; 97 dB, 1W @ 1m
    In the intended 30Hz-80Hz range it will be closer to 95dB/1w/1m

    And of course a different alignment targeted for a different bandwidth will result in a different sensitivity down low.

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