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    Additionally, here is a simplified version using...

    Additionally, here is a simplified version using only 4 EQ points and a filter, tracking within around +0.4dB/-0.2dB from 400Hz to 1kHz, and +/-0.2dB above that:

    - gain -9dB (in DSP or in amp)
    -...
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    Hi Tom, I did a first test in 2016, but never...

    Hi Tom,

    I did a first test in 2016, but never published (nor implemented!) the results.
    I did revisit this last February, and ended up with a set of 8 additional EQ points that have to be added...
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    Yes I guess I could try sanding parts of it,...

    Yes I guess I could try sanding parts of it, thanks for the advice!
    I cannot remember how many coats I did and I am afraid the MDF might be saturated way deep, but it is worth a try!

    I heard...
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    I hope Jakob will not mind if I revive and hijack...

    I hope Jakob will not mind if I revive and hijack this thread with my own question :)

    I have a set of MDF enclosures that I coated with a water-based filler with the project of painting them.
    I...
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    M2 tested on a klippel test bench at Erin's audio...

    M2 tested on a klippel test bench at Erin's audio corner:
    https://www.erinsaudiocorner.com/loudspeakers/jbl_m2/

    89443
  6. Thread: DIY M2 Questions

    by pos
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    Oups I meant to write "A -8dB higshef is the...

    Oups I meant to write "A -8dB higshef is the exact equivalent of a +8dB lowshelf" in my response.
    Gotta avoid typos with those things... :banghead:




    Yes good point, the "corner frequency"...
  7. Thread: DIY M2 Questions

    by pos
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    A -8dB higshef is the exact equivalent of a -8dB...

    A -8dB higshef is the exact equivalent of a -8dB lowshelf at the same frequency and Q, with a 8dB gain difference.
  8. Thread: Help for JBL k2

    by pos
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    Swapping drivers will require a modification of...

    Swapping drivers will require a modification of the crossover, or going active.
    If you are prepared for such an endeavor (measurements + simulations, etc.) then going for a 4" driver might be the...
  9. Thread: 4367 Cabinet

    by pos
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    The BSS BLU-160 and BLU-80x series do have enough...

    The BSS BLU-160 and BLU-80x series do have enough FIR taps for phase linearization, and you could probably build the whole correction in FIR if you settle for a 48kHz sample rate.
    I would be happy...
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    That is really interesting!! Is it a straight...

    That is really interesting!!
    Is it a straight 0.75"/1" adapter?
    As you have a 2-part 2344 I imagine you might even try to do a one piece adapter avoid the horizontal narrowing in the throat?...
    ...
  11. Thread: KM2

    by pos
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    Some inspiration:...

    Some inspiration: http://www.audioheritage.org/vbulletin/showthread.php?34672-Sub-for-Everest-DD66000/page6
  12. Thread: Jbl 4349

    by pos
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    The 4349 was tested on ASR:...

    The 4349 was tested on ASR: https://www.audiosciencereview.com/forum/index.php?threads/jbl-4349-review-studio-monitor-speaker.22686/

    Clearly bad design choices at play...

    Is posted a rant...
  13. Thread: KM2

    by pos
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    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.
  14. Thread: KM2

    by pos
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    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
  16. Thread: KM2

    by pos
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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?
  17. 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.
  18. 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...
  20. Thread: KM2

    by pos
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    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...
  21. 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...
  23. Thread: KM2

    by pos
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    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...
  24. 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...
  25. Thread: KM2

    by pos
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    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...
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