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  1. Replies
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    Well, what frequency is the port tuned to? I...

    Well, what frequency is the port tuned to?

    I think you are below the tuning of the cabinet and once you get below that frequency the excursion of the woofer gets very large and pushes high...
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    Quad 909.

    Quad 909.
  3. Replies
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    From what I can read from various sources, the...

    From what I can read from various sources, the Transfer Magnitude Function (TMF) allows a relative comparison of the lower frequency spectrum between a reference and your currently modeled enclosure....
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    I agree on multiple subs and a sealed cabinet for...

    I agree on multiple subs and a sealed cabinet for the mains.

    You want at least two or more subs and you will have to play around with the locations to get the best and most even response. Read...
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    The best thing to do is measure the driver's T/S...

    The best thing to do is measure the driver's T/S response. You can do this yourself (I suggest getting Vance Dickason's The Loudspeaker Design Cookbook).

    Vance outlines the process for getting...
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    I would suggest flush mounting the driver to...

    I would suggest flush mounting the driver to improve some of the diffraction.

    Diffraction is the likely culprit with the upper end ripple. You can round over the edges of the cabinet to relieve...
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    I don't have that driver in LEAP5, so I had to go...

    I don't have that driver in LEAP5, so I had to go and just input the T/S parameters, for what they are worth.

    LEAP5 gave me 4.12" for the port length of two 4" ID ports in a cabinet with a net...
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    Buy a Woofer Tester 2. This way you can test the...

    Buy a Woofer Tester 2. This way you can test the T/S parameters of the ones you had reconed and compare to the generic cone's response.

    The OEM parts probably are of higher quality, such as voice...
  9. Thread: Bad 2235H?

    by Loren42
    Replies
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    22,790

    The big difference between the 2234H and 2235H...

    The big difference between the 2234H and 2235H (besides cone mass) is the 2235H gives you an audio warning when Xmech is reached, whereas the 2234H does not annunciate that it is about to self...
  10. Thread: Bad 2235H?

    by Loren42
    Replies
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    22,790

    That would depend on how the drivers are wired,...

    That would depend on how the drivers are wired, but generally, solid state amps put greater power out as the impedance drops.
  11. Thread: Bad 2235H?

    by Loren42
    Replies
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    22,790

    Vented, I take it? Where is it tuned?

    Vented, I take it?

    Where is it tuned?
  12. Thread: Bad 2235H?

    by Loren42
    Replies
    39
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    22,790

    Did your setup include a filter for sub-sonics?

    Did your setup include a filter for sub-sonics?
  13. Replies
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    I agree, but poor xmax.

    I agree, but poor xmax.
  14. Replies
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    AE Speakers is a business serving a niche market....

    AE Speakers is a business serving a niche market. JBL is trying to be all things to all people.

    I like Porsche's slogan that states that their car is not designed to be all things to all people,...
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    Good idea. Also, what did you design the box...

    Good idea.

    Also, what did you design the box too? You should have a target internal volume and a tuned frequency. Where is it tuned to if you measure the frequency?

    Are you sure it is the box...
  16. Replies
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    85,160

    Wide dispersion is both subjective and I guess...

    Wide dispersion is both subjective and I guess arbitrary. So, the question is, wider than what?

    I don't have one to test, so I could not say what it actually does.

    This was a link John sent...
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    That is a nice little assembly line.

    That is a nice little assembly line.
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    Email John at Acoustic Elegance LLC Sales...

    Email John at Acoustic Elegance LLC Sales [email protected] and find out.

    John is pretty good at getting back to you fast.
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    What is really nice about these drivers is, for...

    What is really nice about these drivers is, for example, the inductance. The inductance of the 2235H is four times the amount of the TD15H! The TD15H also has very, very low distortion and a very...
  20. Thread: Bad 2235H?

    by Loren42
    Replies
    39
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    22,790

    Should not be a problem if you order the PCB. ...

    Should not be a problem if you order the PCB. Just buy the components, push them into the circuit board, solder, and clean with acetone of alcohol. You need a power supply, but there are...
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    Unfortunately, JBL is just moving with the market...

    Unfortunately, JBL is just moving with the market here and I can agree that I don't like where it is moving, but JBL can not afford to swim upstream and they shouldn't.

    There are many smaller...
  22. Thread: Bad 2235H?

    by Loren42
    Replies
    39
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    22,790

    It can not hurt! This circuit...

    It can not hurt! This circuit should be just about perfect for you. It is tuned for 17 Hz, but you can change it easily enough if you need to.
  23. Thread: Bad 2235H?

    by Loren42
    Replies
    39
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    22,790

    Audible sound level may not have too loud, but...

    Audible sound level may not have too loud, but subsonic rumble may have had a lot more energy and thus caused the bottoming out of the woofer.
  24. Thread: Bad 2235H?

    by Loren42
    Replies
    39
    Views
    22,790

    The only advantage would be a higher...

    [/QUOTE]

    The only advantage would be a higher damping ratio, but I agree, no need for higher wattage.

    The crown claims a damping factor of only 3,000. :applaud:

    The MA5002vz is rated at...
  25. Thread: Bad 2235H?

    by Loren42
    Replies
    39
    Views
    22,790

    It sounded like someone took the back end of a...

    It sounded like someone took the back end of a screwdriver and rapped it smartly on the side of the cabinet.

    My instinct was/is that the driver's VC hit something. As another poster stated, it...
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