New Polk Audio "Legend" Speaker Series shown at 2019 Hong Kong High End Audio Video Show

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  • winwinc81
    winwinc81 Posts: 2
    The legend 800 really awesome speakers. The below is my setup, within the apart distance of 2.4m, MLP at 3.3m and angle of more than 20 degree. It's really really awesome sounding

    ncv39vvzc5dx.jpg
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  • winwinc81
    winwinc81 Posts: 2
    edited December 2019
    Sitting at 3.3m from left and right speakers respective to MLP.
    Left and right speakers are 2.4m apart.
    Left and right speakers is about 21.76 degree based on MLP

    All measurement plus minus 0.2m and 1 degree angle from MLP best estimate.

    SDA effect is phenomenal!. The sound stage already alive using my previous LSIM, it's even better with the wideness from SDA. "Celebrating John Williams Los Angeles Philharmonic Gustavo Dudamel" album literally is alive in front of me. :smile:

    I'm using soundbox diffusers and self made absorbers.

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  • mhardy6647
    mhardy6647 Posts: 34,345
    edited January 2020
    I apologize for posting this here but it seemed a little too second-hand to post in the L200 demo reviews thread. Still, I reckon this may be of interest to at least some of you us -- who are interested in correlating what one hears with what one may quantify*. Note that correlation doesn't imply causation** :)and I am not pretending that this poster is an expert in measuring loudspeaker response.

    Still, it is interesting to see some data, questionable though its provenance may be.

    https://www.audiosciencereview.com/forum/index.php?threads/polk-legend-l200-on-and-off-axis-measurements-preliminary.10098/

    pw9j60sbz5kv.png


    ... I still wanna see the impedance and phase curves for the L200 :)

    ____________________
    * Of course, just because one may measure something doesn't mean it's audibly important (and vice versa) and just because someone can push a button and measure something doesn't mean he/she/they are doing it correctly, much less meaningfully. :p

    ** https://xkcd.com/552/
    78ka306kphy5.png
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  • mhardy6647
    mhardy6647 Posts: 34,345
    edited January 2020
    It's interesting, to me, that the person who did those measurements ascribed a slight forwardness he/she/they hear in the L200 in their room to that little 3k to 4k bump in the (on axis) response.

    FWIW, I didn't find then at all forward, but, then again, I am used to Altec-style midrange :*

    The 'review' also mentioned a 550 Hz resonance that was particularly noticeable off-axis. I'll admit I didn't do much deliberate off-axis listening when we demo'd the L200, but I didn't notice anything funny that might be expected from a 550 Hz resonance. It will be recalled that concert "A" (A4) is 440 Hz; 550 Hz is reasonably close to "C5-sharp" (aka "D5-flat"), so kinda in the middle of the piano's (fundamental) range (just a bit more than an octave above 'middle C').

    https://pages.mtu.edu/~suits/notefreqs.html

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    https://en.wikibooks.org/wiki/Piano/Reading_Music
    source: https://en.wikibooks.org/wiki/Piano/Reading_Music
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  • mhardy6647
    mhardy6647 Posts: 34,345
    edited January 2020
    So -- some chatter at ASR (yes... :p ) and elsewhere got me to thinking about "SDA".
    Fueled by three large cups of coffee and a bit sleep depraved deprived :) I came up with the following, not terribly thought out, Gedankenexperiment.

    Suppose you had two (human -- or AI, if need be) violinists of equal ability and equipped with equivalent violins. Position those two violins in the positions normally occupied by a pair of properly set up L800s and take a seat in the proper listening position (with or without a beanie equipped with proper measuring equipment!)

    Ask both violinists (politely, of course) to play the same thing at the same time. Could be a piece of music, or a single note. The latter might be more amenable to analysis :)

    Listen to the result.

    Seems to me this would be a reasonable approximation of two point sources similar to two stereo loudspeakers. The "signal" would be, in essence, mono... but the effects of crosstalk between the two sources (I would think) would be quite evident to a human listener with two ears in the traditional configuration :) I suspect there'd be some noticeable weirdness if the two musicians/violins were playing the same note!

    Not sure what further 'testability' this model would have, but I thought it would be fun and interesting to try.

    B)

    t05myul2uxhw.png
    source: https://en.wikipedia.org/wiki/Stereophonic_sound
    (not quite the right illustration but you get the point :) )

    by2evcc17tc6.png


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  • F1nut
    F1nut Posts: 51,193
    No more coffee for you.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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