LarsHP
Headphoneus Supremus
The reseller I have talked to said that the sound difference between N650 and N550 is subtle. According to him, the N650 has slightly more top end - and my experience with N550 says that it already has slightly too much in the uppermost treble. In other words: You don't need more treble than N550 unless you love a pronounced U-shaped frequency response...
The reseller also mentioned that on Chinese web sales platforms like Aliexpress etc., the items sold may be of different quality even though they look the same and state the same info. This - he suggested - explains the price difference of apparently identical items. I don't know if this is true, but it might explain why some people get a bad sample while others get a good product.
Perhaps it's even from the same producer, and some items pass the quality control and others (that don't pass QC) are sold cheap?
The reseller also mentioned that on Chinese web sales platforms like Aliexpress etc., the items sold may be of different quality even though they look the same and state the same info. This - he suggested - explains the price difference of apparently identical items. I don't know if this is true, but it might explain why some people get a bad sample while others get a good product.
Perhaps it's even from the same producer, and some items pass the quality control and others (that don't pass QC) are sold cheap?