Approved boundary layer microphone

• can stand on the ground and mounted onto a wall
• electret capsule
• wide frequency spectrum
• very good transient response
• first introduced in 1983 under the model name OMS-BO (Optimales Mono Signal-Bodenmikrofon) 
• is today also sold under the name MBNM 621
• manufacturing period: since 1983

Favourite applications: round table, micing of a grand piano, bass drum, cello, upright bass