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  1. Thread: M2 vs 4430/35

    by pos
    Replies
    9
    Views
    193

    These polars are normalized for 0dB at 0°, so...

    These polars are normalized for 0dB at 0°, so frequency response is not part of the equation here.
    Directivity cannot be changed with DSP (well, outside of the crossover region at least) but the...
  2. Thread: M2 vs 4430/35

    by pos
    Replies
    9
    Views
    193

    I have never heard or measured a "modernized" (ie...

    I have never heard or measured a "modernized" (ie with a properly implemented DSP crossover) set of 4430, but from the technical info I can gather (as well as some subjective assumptions) I guess the...
  3. Replies
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    7,322

    Hi Steve, Using a different woofer will indeed...

    Hi Steve,

    Using a different woofer will indeed call for a different correction.
    If you don't want to have to measure and tune everything yourself then I would advice you to stay in known...
  4. Thread: KM2

    by pos
    Replies
    166
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    10,365

    The impedance is rising from 7kHz up, so the...

    The impedance is rising from 7kHz up, so the series resistor will produce less and less attenuation at higher frequencies.
  5. Thread: KM2

    by pos
    Replies
    166
    Views
    10,365

    Hi Rob, There is a typo: the table shows...

    Hi Rob,

    There is a typo: the table shows 87dB/1m at 15kHz for 2.83V, whereas all the graphs show that same 87dB value at 15kHz for 1V.
    If the voltage value found in the curves is the right one...
  6. Thread: KM2

    by pos
    Replies
    166
    Views
    10,365

    There is a typo indeed: it should read 1V instead...

    There is a typo indeed: it should read 1V instead if 2.83V, as confirmed in the curve page 8 of the EDS: http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=57200&stc=1&d=1350657541
    ...
  7. Thread: KM2

    by pos
    Replies
    166
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    10,365

    Not quite.

    Not quite.
  8. Thread: KM2

    by pos
    Replies
    166
    Views
    10,365

    Hi Andy, If you want more SPL another solution...

    Hi Andy,

    If you want more SPL another solution is to use two 2216nd per speaker, in a 2.5-way arrangement similar to the 4435 or DD66000:
    ...
  9. Replies
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    Looks exactly like what a spammer would do :D...

    Looks exactly like what a spammer would do :D
    Just kidding, welcome aboard!
  10. Replies
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    1,785

    Wait, they mention audioheritage at 10:09! :p

    Wait, they mention audioheritage at 10:09! :p
  11. There are some good candidates for both balanced...

    There are some good candidates for both balanced and unbalanced operation now!
    For unbalanced operation the current champ is the topping L30:...
  12. Replies
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    951

    I wonder if that horn will be available as a...

    I wonder if that horn will be available as a part...
  13. Very exciting indeed! What about the...

    Very exciting indeed!

    What about the distortion of the amp itself, for power tests?
    An autoformer could possibly solve the issue, or simply an lpad.
    Another solution would be to use a very quiet...
  14. Replies
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    4,044

    What make you think the voice coils are damaged?...

    What make you think the voice coils are damaged?
    I don't see anything obvious from the picture above.

    At this point you should probably send the drivers to some competent shop and have them clean...
  15. Replies
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    4,044

    The 476Mg use magnesium diaphragms that are...

    The 476Mg use magnesium diaphragms that are different from the titanium ones listed above.
    Unless you manage to get your hands on magnesium diaphragms you will not get the same response as the...
  16. Thread: Jbl 4349

    by pos
    Replies
    34
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    8,885

    Thanks for posting this! With such an high...

    Thanks for posting this!
    With such an high crossover frequency for a 12" woofer that was to be expected.
  17. Replies
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    312,098

    You really need to measure the output of your DSP...

    You really need to measure the output of your DSP and adjust from there, as it is both easier and (much) more accurate than measuring the drivers + room.
    By the way, do you have an accurate...
  18. Replies
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    312,098

    Hi Rob That spinorama might come from an early...

    Hi Rob

    That spinorama might come from an early prototype, but might not have passed the listening test... :dont-know:

    The UHF response drops off axis, but that is already pretty good for a 1.5"...
  19. Replies
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    312,098

    The listening axis is indeed right between the...

    The listening axis is indeed right between the horn and woofer, but you cannot use that for nearfield measurements as you would get a much higher angle that way that what you would get at...
  20. Rob, I can relate to your 3" vs 4" listening...

    Rob, I can relate to your 3" vs 4" listening impression here: the is a notable difference in dynamic that is hard to understand when looking at measurements.
    I also heard the same kind of difference...
  21. Replies
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    Sorry for the confusion!! I will continue in...

    Sorry for the confusion!!
    I will continue in your large format comp thread: http://www.audioheritage.org/vbulletin/showthread.php?42373-Large-Format-Compression-Driver-Listening-Impressions
  22. Replies
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    Amazing work Rob! Have you had a chance to...

    Amazing work Rob!
    Have you had a chance to compare the 2453 with the 2450SL sonically?
  23. Replies
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    Hi Flodstroem, Mine was pretty old, probably...

    Hi Flodstroem,

    Mine was pretty old, probably first generation with the ASRC bug and extension card port.
    I remember the processor usage went up and down for no good reason.
    Maybe they improved...
  24. Replies
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    312,098

    Looks like a legit D2430K driver to me. The "M2"...

    Looks like a legit D2430K driver to me.
    The "M2" version (whatever that implies) exists with both the grey and yellow foilcals.
    What you need to look for here is the "M2 D2430K" paper sticker on...
  25. Replies
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    300Hz is a difficult frequency to deal with when...

    300Hz is a difficult frequency to deal with when measuring in a room, but with a combination of close mic measurement and spatial averaging around the listening position (eg MMM technique) it can be...
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