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  1. Thread: KM2

    by pos
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    22,460

    The official T/S are pretty accurate, but outside...

    The official T/S are pretty accurate, but outside of modeling LF response to design a box, T/S are pretty limited in use, and certainly not sufficient to design a crossover for example.
  2. Thread: KM2

    by pos
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    22,460

    Hey, you specifically removed the part about...

    Hey, you specifically removed the part about transconductance in your quote :D
    Too bad, this is one of the big positives of using a midwoofer.

    Regarding crossover design and phase tracking, do...
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    http://www.audioheritage.org/vbulletin/showthread....

    http://www.audioheritage.org/vbulletin/showthread.php?33972-JBL-Master-Reference-Monitor&p=383264&viewfull=1#post383264

    https://rephase.org/projects/JBL_M2_crossover.pdf
  4. Thread: KM2

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    Now you have said too much Ian, I am genuinely...

    Now you have said too much Ian, I am genuinely interested :)
    Was it a private discussion? No trace to be read/heard anywhere?
  5. Thread: KM2

    by pos
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    Did Greg specifically mentioned replacing the...

    Did Greg specifically mentioned replacing the 6dB/oct passive filter with a 12dB/oct active one, one octave above the original one?
    I would love to read about this if you have a link.
  6. Thread: KM2

    by pos
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    Polars would be horrid, angled baffle or not

    Polars would be horrid, angled baffle or not
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    It looks like it is getting slower by the day :(...

    It looks like it is getting slower by the day :(
    Is there a problem with the database?

    From France, asking for new posts in a thread took a whopping 40 seconds: 10 seconds for the redirection to...
  8. Thread: KM2

    by pos
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    22,460

    The TAD and JBL are very different animals...

    The TAD and JBL are very different animals despite the visual similarities.

    In the TAD 2401 both 15" play together up to 650Hz, whereas in the JBL DD66000 only one woofer goes up to the 700Hz...
  9. Thread: KM2

    by pos
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    Hi Ivica, No info, sorry. I assume it is not TCR...

    Hi Ivica,
    No info, sorry. I assume it is not TCR but I might as well be wrong given the lack of public info on the subject.
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    Did you notice an improvement with the passive...

    Did you notice an improvement with the passive biamp configuration?
    I have never tried this with mine but I have read that the results were positive with the LSR(63)32.
    If this is the case then you...
  11. Thread: KM2

    by pos
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    22,460

    Other things being equal, a higher cone mass...

    Other things being equal, a higher cone mass simply means a lower mass breakpoint frequency.
    I doubt this is the only factor to consider when going from a 2216 to a 2262.
    The 15" variant of the...
  12. Thread: KM2

    by pos
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    keep in mind the 2216 is tough to beat though......

    keep in mind the 2216 is tough to beat though...

    I guess that is a joke? :D
    Adding a tweeter around 10kHz is easy, and you don't really care about phase coherency there as it is a lost cause...
  13. Thread: KM2

    by pos
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    22,460

    Anti K, using a lowmid can be rewarding, but it...

    Anti K, using a lowmid can be rewarding, but it is pretty difficult to setup correctly, especially the crossover with the woofer(s).
    3-ways are specially tricky to get right when it comes to phase...
  14. Thread: M2 vs 4430/35

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    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...
  15. Thread: M2 vs 4430/35

    by pos
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    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...
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    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...
  17. Thread: KM2

    by pos
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    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.
  18. Thread: KM2

    by pos
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    22,460

    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...
  19. Thread: KM2

    by pos
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    22,460

    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
    ...
  20. Thread: KM2

    by pos
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    22,460

    Not quite.

    Not quite.
  21. Thread: KM2

    by pos
    Replies
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    22,460

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

    Wait, they mention audioheritage at 10:09! :p
  24. 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:...
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    I wonder if that horn will be available as a...

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