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    Surround speaker height - general consensus on 2 feet above ear level? (close distance, music only)

    I believe that statements like "Surround loudspeakers should be roughly 2 feet (0.6 m) above seated ear height and mounted so that sound radiates freely over a horizontal dispersion angle that embraces all the listeners" from the first/second edition, as well as pictures like 15.10b in the third...
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    Speakers against front wall - can this be settled?

    This interaction between speakers and boundaries (the three nearest ones being the floor, rear wall, and proximal side wall) at low frequencies was described by Roy Allison (http://www.troelsgravesen.dk/BOOKSHELF-1/RoyAllison.pdf), and the boundary dip has been referred to as "the Allison...
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    Speakers against front wall - can this be settled?

    Genelec's recommendations are primarily related to frequency response, not about imaging. Again, this is primarily about frequency response. Proximity to a wall tends to boost the bass below 500-1000 Hz, basically like a tilt function. You can see it in the Figure 12.9 posted by @abdo123 above...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    ASW, localization, and loudness do not seem to correlate together in the work of Lokki et al, also the 2013 PhD thesis by William Evans. In the latter, there was an interesting preliminary investigation 4.2.7 Stage 3: Small-Scale Free-Roaming Evaluation: "Contrary to results from the formal...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Thanks, this is a little less vague. In general, from my personal perception, loudspeakers with narrow directivity patterns have been described by others to have a narrow sweet spot (extreme examples include planar dipolar speakers like Sanders and King Sound, also highly directive designs like...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    No, so I wonder if it's possible that you haven't heard CBT speakers. Fall-off with distance within limits is linear, not squared. More importantly, due to the shading, intensity actually seems to go down as one approaches the proximal loudspeaker at a given height. Floyd Toole wrote: "It was...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    This is very vague. Can you provide more specifics?
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    No, you already cited two very strange alternatives like semi-cardioid turned sideways and semi-dipole rotated obliquely. Furthermore, there are other alternatives like CBT designs that change the fall-off with distance and hence all calculations/models.
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Can you show any detailed measurements of any speakers that can work well for this? Preferably showing pattern across angle and frequency. Most of what you say is really quite vague.
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Ah, my mistake. It feels strange for me to look at the Kef Wireless II (https://www.erinsaudiocorner.com/loudspeakers/kef_wireless_ii/), which has a lower directivity index for most of its response compared with the D&D 8C (https://www.erinsaudiocorner.com/loudspeakers/dutch_dutch_8c/), compare...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Erin's normalized plots seem to compress oddly. Compare the Genelec 8361A review on ASR (https://www.audiosciencereview.com/forum/index.php?threads/genelec-8361a-review-powered-monitor.28039/), especially relative to the directivity indices of the 8361A and D&D 8C. This does not seem compatible...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Actually, the text and the table seem to be at odds, which I didn't realize before. I had been looking at the unnormalized horizontal contour plots at https://www.erinsaudiocorner.com/loudspeakers/dutch_dutch_8c/, where the 99-102 range seems to roughly go from +/- 0-25 degrees for much of the...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    It just seems strange to have cited the previous two papers that have such unusual directivity/setup recommendations. With regards to the Kates paper, which I downloaded here (http://decoy.iki.fi/dsound/ambisonic/motherlode/source/Optimum loudspeaker directional patterns_Kates_1980.pdf), it...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    @markus I skimmed both papers, and I have two questions: 1. For the Davis paper, could one achieve a relatively similar result by using two cardioid speakers pointed straight at each other? That basically seems to be the radiation pattern shown. "The loudest axis points not out into the room but...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Can also try this link, instead: https://oplug-support.org/linkwitzlab/Links/Optimized-listening-area-Davies.pdf
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    How does speaker distance to wall impact imaging and soundstage?

    I asked Floyd Toole about this: https://www.avsforum.com/threads/how-to-choose-a-loudspeaker-what-the-science-shows.3038828/page-132#post-57878964 I can't remember which diyaudio.com discussion I was referencing, possibly this one...
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    Genelec 8361A Review (Powered Monitor)

    These remind me of an older version of Bob Katz's target curve
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    I'm not sure what you're actually saying by "rationale." Can you explain further? In the meantime, let me outline my scientific concerns how you (and really most of ASR) seem to be using this score (which is already stretched beyond its original formulation by adding EQ and/or subwoofer). Toole...
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    You were just referring to a prediction score with an accuracy of 86% (sorry, not 85%), not based on actual preference testing with blind listening
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    Effect of Loudspeaker Directivity Compared with In-room Measurements

    Preference rating only 85% predictive, interesting that the Salon2 and Array 1400 were reported to have performed similarly in actual blind testing at Harman
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