classic low-cut filter from the late fifties

• comes from an era in which neither microphones nor preamps were provided with a low-cut
• passively built
• selectable limiting frequencies: 40, 80, 113, 160 Hz
• determined hi-cut at 15 kHz
• manufactured also as studio module under the name Neumann W75k (same housing as V72)
• manufacturing start: 1959

Favourite application: usually employed in the signal path between microphone (Neumann U47, M49, for instance) and mic preamp (Lorenz V241, Siemens V77, for instance)