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  1. Replies
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    Thank you, that's amazing! So I tend to give...

    Thank you, that's amazing! So I tend to give these Radians a try and throw it into my 2421's before installing these in my 4430 projects.

    Best regards!
  2. Replies
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    113

    Thanks a lot, Edgewound! Can I derive from...

    Thanks a lot, Edgewound!

    Can I derive from your statement that these 2425 replacement diaphragms will both also fit into 2421 cores?

    Best regards!
  3. Replies
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    Dear Father - Yes

    Here are the books
    Of Luke
    You'll need them
    To open the seed
    To see what goes on in the world

    You're in my mind
    Catch the wind and hold on tight
    To what we'll find
    And hear what goes on in...
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    Replacement diaphragm for 2421A?

    Hello everyone,

    while surfing through the offers of a well known German musical instrument supplier I've found a genuine JBL D8R2425 diaphragm as well as a Radian 1225-8. They call € 189 for the...
  5. Hi, I'm afraid the one in the pic doesn't :D!...

    Hi,

    I'm afraid the one in the pic doesn't :D!

    Best regards!
  6. Replies
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    470

    Thanks budney! I hadn't realized that the glue...

    Thanks budney!

    I hadn't realized that the glue that fixes the surround and the spider to the basket is soluble.

    Anyway, if we'd try to extract an intact 2235H cone or any other one with foam...
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    470

    Sorry, I also can't help with VC specs, but am...

    Sorry, I also can't help with VC specs, but am interested to get in touch with anyone who's able to regauss those AlNiCo-V magnets to their original strength.

    I have a question, too: How does one...
  8. Hi Goldjazz, if these drivers are front mount...

    Hi Goldjazz,

    if these drivers are front mount and you don't mind the somewhat compromised look, even removing these old, useless gaskets might be an option.

    Best regards!

    Edit: Or did you...
  9. Some more thoughts on the possibility of a...

    Some more thoughts on the possibility of a blocked back vent: I don't follow the argument that a blocked vent only will affect Q, but not fs. As this adds some more stiffness due to the locked air...
  10. Another possibility (how it is done by me):...

    Another possibility (how it is done by me): Arrange a flying lead lab bench setup: Sinusoidal signal generator - power amplifier - lab bench power supply. Tune frequency and watch the amplifier's...
  11. I have the suspicion that there's something very...

    I have the suspicion that there's something very bad with the software or the measurement setup Morton has been using. Look at his graphs and results in #11. Both drivers show a minimum impedance at...
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    Please see my thread here ...

    Please see my thread here ;)!

    Best regards!
  13. Replies
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    Ok. As Hofmannhp was a Super Moderator then, I've...

    Ok. As Hofmannhp was a Super Moderator then, I've regarded his work as absolutely trustworthy. Admittedly I never had a look into an empty 4435 cabinet, though ;). To be more precisely, I never had...
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    Hello, according to the cabinet drawings in...

    Hello,

    according to the cabinet drawings in this thread there are two separate chambers in the 4435. For details, have a look at this drawing.

    Best regards!
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    Do we really need a CD's TSP's to design a horn?...

    Do we really need a CD's TSP's to design a horn?

    Best regards!
  16. Replies
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    Fully agreed! DB has done excellent tunes, but...

    Fully agreed! DB has done excellent tunes, but also some we'd better forget.

    Best regards!
  17. Replies
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    All in all, this recone job is of top...

    All in all, this recone job is of top professional execution. Weren't this paper dust cap, I'd be tempted to say it's a stock unit.

    Best regards!
  18. Thanks a lot! I didn't want to discourage you....

    Thanks a lot!

    I didn't want to discourage you. To be honest, I'd most probably feel itched to get it working again if it were mine, but not for any amount of money. I'd do it the way that I've...
  19. I assume you wish to get this unit working again?...

    I assume you wish to get this unit working again? Honestly, due to the vertiginous prizes of more or less suitable substitutes and the brittleness of germanium power devices in general, I'd consider...
  20. I don't know these NTE 121's, but if they're...

    I don't know these NTE 121's, but if they're germanium, increased leakage in comparison with silicon devices of similar power capability isn't that unusual. Anyway, you're right, 30 bux each, while...
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    Thanks a lot, Ian, Barry and Richard :applaud:! ...

    Thanks a lot, Ian, Barry and Richard :applaud:!

    Well, now I'm feeling itched a fortiori! Coincidentally, someone offers two empty E 130 baskets in eBay Germany right now. Assuming they're...
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    Maybe I misunderstand you, but I assume the...

    Maybe I misunderstand you, but I assume the following: If someone fits a C8R2235 kit with it's mass ring into a proper 15" basket, this driver will show exactly the same cone mass and suspension...
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    Even more mass than that 35 g ring? Wouldn't this...

    Even more mass than that 35 g ring? Wouldn't this decrease fs?

    Best regards!
  24. Replies
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    Thanks to both of you :applaud:! Much appreciated...

    Thanks to both of you :applaud:! Much appreciated !

    Ok, drop-in into a stock 4430 doesn't do. OTOH, couldn't exactly a 4430 benefit from the woofer's slightly increased midrange performance? Apart...
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    Hello Barry, when I pointed at the numbers, my...

    Hello Barry,

    when I pointed at the numbers, my browser tried to interpret them as an URL. So I assumed that you've erroneously put a wrong URL behind them. Sorry for that!

    Best regards!
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