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  1. Replies
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    181

    Yes RoB, I think all of us M2 DIYers can be...

    Yes RoB, I think all of us M2 DIYers can be grateful to you :)

    SL diaphragm I presume. Hmmmm, passive crossover maybe?
  2. Thread: Help

    by pos
    Replies
    27
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    723

    The forum search engine has its limits, but as...

    The forum search engine has its limits, but as explained in my post above (#17, did you actually see it ?..) you can use google (and google image) for a site-specific search.
  3. Thread: Help

    by pos
    Replies
    27
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    723

    Hello Pigboat, I am no expert, especially with...

    Hello Pigboat,

    I am no expert, especially with things like cabinet construction/refurbishing and passive crossovers, and I don't own any of these speakers.
    I also have no daughter, so take my...
  4. Thread: Help

    by pos
    Replies
    27
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    723

    Fortunately science is moving forward: these days...

    Fortunately science is moving forward: these days you can already clone better versions of two items in that list :D
  5. Replies
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    did not meant to offend you :p

    did not meant to offend you :p
  6. Replies
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    7,201

    Hello jmpsmash, fun project! In your situation I...

    Hello jmpsmash, fun project!
    In your situation I think I would try something like this to mitigate the differences in directivity between the 15" and the 2397, and potentially raise the crossover...
  7. Thread: Project Widget

    by pos
    Replies
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    4,900

    That particular tweeter is not a diffraction slot...

    That particular tweeter is not a diffraction slot like the 2405, and albeit it shows a major pattern flit in the <10kHz range, it is not the case anymore above 10kHz where it gets both H and V...
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    The 2213nd-2 could be a good candidate as it...

    The 2213nd-2 could be a good candidate as it apparently sports the same TCR voice coil material as the 2216nd, which is supposedly the main responsible for its highly dynamic/uncompressed sound:...
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    Beware: TAD's 1.5" is 39mm whereas JBL's one is...

    Beware: TAD's 1.5" is 39mm whereas JBL's one is 38.1mm
  10. Directivity matching is a key aspect here. What...

    Directivity matching is a key aspect here.
    What I would do if I were in your situation would be to measure the horn's H and V directivity in that range and seek for the appropriate matching tweeter.
  11. Thread: D8r435al-1

    by pos
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    586

    My guess: 435AL (obviously) 435Be 2431...

    My guess:


    435AL (obviously)
    435Be
    2431
    2435
    2430H (not the same driver as the D2430K)
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    Hello Joel Nice build! I think the first...

    Hello Joel

    Nice build!

    I think the first generation of DMS-1 had the smooth SL diaphragm. Don't know if each generation had specific EQ settings though...
    Regarding the 1400ND's, as these kits...
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    Initial rephase settings were directly translated...

    Initial rephase settings were directly translated from Crown official M2 settings, as reported by member 4313B.
    These were later adjusted to fit the actual measurement (in fact two independent...
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    Hello Daz Here is what Bruno Putzeys has to...

    Hello Daz

    Here is what Bruno Putzeys has to say about this (starting here) :


    Of course this is in the context of the hypex nc400, but I guess this could at least partly translate to your amps...
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    Not so sure about the VTX/M2 difference. Mine...

    Not so sure about the VTX/M2 difference.
    Mine are marked as "M2 D2430K" and have the correct part number, but have the silver label.
    I also got 3 used VTX D2 from ebay a long time ago, and they...
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    Agreed, gain matching is very important, so you...

    Agreed, gain matching is very important, so you have to check both the gain of the amp and the level of your source/DAC.
    Ideally you will want a 0dBFS signal to produce the maximum level you will...
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    You will also need SAM2 LF modules to cover the...

    You will also need SAM2 LF modules to cover the 80Hz-900Hz range.
  18. Replies
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    IIRC the felt pads in TAD 4" diaphragm drivers...

    IIRC the felt pads in TAD 4" diaphragm drivers are less thick than that.
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    6,816

    16 ohm JBL compression drivers have a minimum...

    16 ohm JBL compression drivers have a minimum impedance of around 12 ohm in the passband (Re might be lower, but is irrelevant here).

    Bubbleboy is running his 16 ohm 476Mg with the THX. I think he...
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    8 ohm nominal (so around 6 ohm min for a typical...

    8 ohm nominal (so around 6 ohm min for a typical JBL compression driver) is definitely too low for that amp.
    A LPUHP amp would be a better match.

    The THX is the perfect match for a 16 or 32 ohm...
  21. Oups, sorry for the confusion. I have no...

    Oups, sorry for the confusion.

    I have no experience with passive design software, but I guess they will let you compensate for the cap and calculate the raw magnitude/phase response for you.

    If...
  22. If you need a protection cap in the final biamped...

    If you need a protection cap in the final biamped system then it make sense to measure and adjust it with the (same) cap in place.
    The high-pass magnitude and phase effect have to be taken into...
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    I'd say bubbleboy76 is already pretty active on...

    I'd say bubbleboy76 is already pretty active on the forum.
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    By running the numbers in a simulation tool it...

    By running the numbers in a simulation tool it appears the LE14H-4 is to the LE14H-3 (or any other LE14H variant) what the 2234H is to the 2235H.
    The lighter cone increases its midrange efficiency,...
  25. Hi Didier, Are you sure the 2435HPL would show...

    Hi Didier,

    Are you sure the 2435HPL would show this particular problem on your particular horns? (Arai290 3/4 scaled version IIRC?)
    In my tests I found the problem was almost non-existent on the...
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