I don't know which system you listened to the two tracks through, but I just reran the test for fun through a PC and a pair of headphones and I can confirm that I didn't perceive any stereo effect in that video.I could hear stereo in the two music tracks at the end of the video
Just sayin'...
Precisely to give correct information, which however has further confused things because it is said, but not explained, I have just found a couple of reviews which state that a certain stereo effect is perceived because the signal is not downmixed to mono.
https://www.rtings.com/speaker/reviews/jbl/partybox-encore-essential ("It can play stereo content without downmixing it to mono")
https://latestintech.com/jbl-partybox-encore-essential-speaker-review/ ("it played stereo content without downplaying it to mono")
I honestly don't know what that means and probably any other single speaker receiving a stereo signal would behave like this, but this one has two tweeters!
Now I guess: could there be a technology where only the two tweeters reproduce the stereo signal and the single woofer does not?
https://www.rtings.com/speaker/reviews/jbl/partybox-encore-essential ("It can play stereo content without downmixing it to mono")
https://latestintech.com/jbl-partybox-encore-essential-speaker-review/ ("it played stereo content without downplaying it to mono")
I honestly don't know what that means and probably any other single speaker receiving a stereo signal would behave like this, but this one has two tweeters!
Now I guess: could there be a technology where only the two tweeters reproduce the stereo signal and the single woofer does not?
When you think about it, comb filtering between spaced drivers is more likely to occur with a mono drive signal because they are producing the same sound but spaced apart. If a stereo signal is used where each driver produce a different signal there is less likely to be interference issues. Additionally with a high directivity driver they may not interfere too badly, but they can be angled to bounce off different surfaces in the room and give a more immersive sound.
You had me at "comb" so just take me you beast.
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