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  1. Replies
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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.
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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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    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...
  9. 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...
  10. 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,...
  13. 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...
  14. Thread: SAM with 4365

    by pos
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    559

    AFAIK these are just tailored-made EQ and phase...

    AFAIK these are just tailored-made EQ and phase linearization profiles.
    In fact I am not even so sure it does phase linearization...
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    ignorance is bliss ;)

    ignorance is bliss ;)
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    Thatís right :)

    Thatís right :)
  17. Thread: D2415k

    by pos
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    I am afraid not :(

    I am afraid not :(
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    Hi Jonas, Barry was kind enough to do some...

    Hi Jonas,

    Barry was kind enough to do some measurements on his crown amps, but incompatibilities between our measurement software got in the way.

    I would be very curious to see those BSS...
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    I am using the THX AAA 789 on my D2430K, and it...

    I am using the THX AAA 789 on my D2430K, and it does wonders! :bouncy:
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    Thank you Leslie, that is very helpful! :)

    Thank you Leslie, that is very helpful! :)
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    Anyone?

    Anyone?
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    Nice! I guess this is FFT convolution then. 6144...

    Nice! I guess this is FFT convolution then.
    6144 taps is a bare minimum for the LF part. The HF part requires much less
    Given this is FFT convolution guessing buffering delays can be non trivial,...
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    A question for those how 3D-printed their ports...

    A question for those how 3D-printed their ports based on the STL files.
    What printing parameters did have success with? (material, infill, layer height, thickness, etc.)
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    Thank you, that is a nice complement to Rob's...

    Thank you, that is a nice complement to Rob's impedance measurement here:
    http://www.audioheritage.org/vbulletin/showthread.php?p=413303#post413303

    Surprisingly the peak positions are closer to...
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    Hello Rob, If you PM me your email address I can...

    Hello Rob,
    If you PM me your email address I can forward you Rob's measurements.
    I was looking for impedance measurement so I did not find what I was looking for there, but your mileage may vary :)
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