Very good sound quality and volume, although without amplification it is quite satisfactory. While I bought them for Almera n16 to fit in the factory positions in the back, they couldn't be secured with the 4 screws, so they were installed with three, but no issue. They are stable and do not rattle. The good thing is that even with the three, they centered in the positions. As for the bass, they do what they can since there is no space for a box to be placed in the back