With the Redmi 6A, Xiaomi presents the successor of the affordable Redmi 5A, keeping it at the same price while improving the equipment significantly. We evaluate in our review what improvements are waiting for the buyer of the 90-Euro (~$102; starting at $90 in the US) smartphone and how it fares against the competitors.
https://www.notebookcheck.net/Xiaomi-Redmi-6A-Smartphone-Review.362746.0.html
Audio quality of Xiaomi Redmi 6A is in line with top smartphones. SoundExpert.