Current M570 owners, can you please test what you hear between 600Hz and 1000Hz in this video?
When it hit 800Hz and all the way to 900Hz the sound shifted to my left then right driver then stabilized back to both drivers when reaching 900Hz. Is this a defect that qualifies for a return?
Maybe you should return these and get the Sivga P2. same driver and sound closer to the original Aiva. 100$ more though, its comes out to 400$
Check that, too.
Also lower chance it will sound bad. If you like the m570 aside from the defects going with a more reliable model is definitely the route to consider
I asked Zeos and he said that he couldnāt tell a difference from the p2 and the aiva
I wouldnāt be surprised, its pretty much the same headphone but with a different headband and accessories (the p2 and aiva)
Listening to that video above with my Blon B20s there were about 3 or 4 random intervals where the sound shifted from left and right.
I wouldnāt trust a Youtube video, use something like this
https://www.szynalski.com/tone-generator/
I just went to test there as you said that and it happened again. The frequency I just tested that it happens at is around 650hz. Noise will be produced in both cups, but it is noticeably more in the right than the left.
Itās about 630hz - 690hz.
Hmmm, that sounds like an issue with the drivers then, you would want to return if you can
Just a stupid thing but, when I find things like that, I put my headphones backwards on my head and see if the problem could be my ears, too. 
That is a known issue with the sendy drivers though, around that frequency
410hz - 450hz shifts to the right channel and back, 630hz - 690hz shifts to the right channel and back, 1,500hz - 1,550hz shifts to the left channel and back. Those are the obvious ones I hear.
Those are terrible frequencies to have issue with, Iād look at returning if possible.
Guess Iāll see what I can do.
This is indeed a problem with the headphones and not possibly another component?
Itās most likely the headphones because itās restricted to some frequencies and also is known that the driver used can exibit these issues. If you have another headphone or iem I would try and test just to make sure, but Iām fairly certain itās the headphones here
Tested it through my laptopās, phoneās, and ampās headphone output with the same result on all of them. Using my airpods, I donāt get a channel imbalance at the frequencies I mentioned.
Yeah, thatās def the headphones then