The Momentum Sport and Momentum True Wireless 4 have different designs. The Momentum Sport has a rounder profile, making it more comfortable and offering a secure fit during workouts1. It also has heart-rate and body-temperature sensors, which the Momentum True Wireless 4 lacks. However, both earbuds share the same 7mm drivers and have a similar control scheme. The Momentum True Wireless 4 has a more premium charging case, while the Momentum Sport's case is more basic.
The Sennheiser Momentum Sport earbuds offer biometric features such as heart rate and body temperature tracking. These features provide users with insights into their workout performance and can be connected to fitness apps and devices like Apple Watch/Health, Garmin Watch/Connect, Strava, Peloton, and more4. The earbuds also integrate with Polar's Flow app ecosystem for advanced data analysis and heart rate zone monitoring.
The main issues reported with the sound quality of the Momentum Sport are inconsistency and the sacrifice of dynamics due to the increased low-end tone. Some albums may sound detailed and crisp, while others may lack punchy highs and a strong mid-range. The sound profile tends to compress certain elements like guitars and bass lines, which may disappoint users who prefer a more balanced audio experience. Despite the high price tag, the Momentum Sport's sound quality falls short of expectations in comparison to Sennheiser's Momentum lineup.