Sennheiser HD 400 PRO Semi-Open Studio Headphones

The Sennheiser HD 400 PRO are Sennheiser's studio reference headphones designed specifically for mixing and mastering monitoring — providing the extended low-frequency response and high-frequency detail of open-back reference headphones in a semi-open design that reduces ambient noise leakage compared to fully open designs. The HD 400 PRO is the recommendation for content creators and audio professionals who work in home environments where fully open headphones would be too susceptible to room noise but fully closed headphones would sacrifice too much low-end accuracy.

• Semi-open design — balanced ambient isolation and sound stage
• Extended low-frequency response — accurate bass monitoring
• High-frequency detail — reveals mix issues other headphones mask
• For home studio mixing where open-back is impractical