The sound performance of the AirPods 4 is quite satisfactory even though they do not have rubber or silicone tips. With respect to the AirPods 3, the Airpods 4 tend to have an increased focus on the lows which may be due to new or better fitting drivers. While they don’t beat the performance of the Airpods Pro 2 in the low end, there is a noticeable improvement from the Airpods 3. Of course, auditory perception is quite individual and is impacted by the customer fit into the ear canal.