As I said...everyone’s ears are different. For me...the DX150 wasn’t anything to write home about compared to the DX200, which was its big brother. Then the DX200-Ti came along and claimed the top slot as iBasso’s best release. A year later they released the DX220 which basically took the DX200 to a whole new level. My point is that everyone hears differently...but by all accounts the DX150 is very far behind the DX220 in the components department and the sound quality department.