Neumann U 87 Ai Multi-pattern Condenser Microphone

Neumann U 87 Ai — a multi-pattern condenser microphone with a dual-diaphragm capsule, in continuous production since 1967 and regarded as the reference microphone in studios worldwide. Three switchable polar patterns, a low-cut filter, and a -10dB pad make it one of the most versatile studio mics available.

The dual-diaphragm capsule, built from two capsules mounted back to back, allows switching between cardioid, omnidirectional, and figure-8 without swapping capsules — unusual at this quality level, where multi-pattern designs typically compromise on at least one mode. The U 87 Ai stands out for sounding equally good across all three patterns, with a similar frequency response throughout, rather than having one clearly weaker mode as is common in cheaper multi-pattern mics.

One microphone for vocals, room, and a stereo pair

An engineer building a mic locker from scratch often has to source separate models for vocals, room miking, and stereo technique. The U 87 Ai's cardioid pattern works as a primary vocal and voice mic, omni mode handles ambience or string-section recording well, and the figure-8 pattern serves as a side mic in mid/side technique or as an alternative to a ribbon mic on vocals, with less proximity bass buildup than a classic ribbon.

Working at loud sources without raising the noise floor

The -10dB pad lets the mic handle sources up to 127dB SPL without distortion, making it useful on drum overheads or brass as well — applications outside the typical vocal mic use case. The low-cut filter compensates for proximity effect on close-miked sources, and low self-noise keeps the signal clean even on quieter sources.

KEY FEATURES

• Condenser microphone, dual diaphragm, pressure-gradient transducer
• 3 switchable polar patterns: cardioid, omnidirectional, figure-8
• Switchable low-cut filter compensating for proximity effect
• Switchable -10dB pad
• Max SPL up to 127dB (with pad engaged)
• Very low self-noise
• Classic, instantly recognizable body and headgrille design
• In continuous production since 1967

TECHNICAL SPECIFICATIONS

• Type: condenser, pressure-gradient transducer
• Polar patterns: cardioid, omni, figure-8 (switchable)
• Frequency range: 20Hz - 20,000Hz
• Sensitivity at 1kHz / 1kΩ: 20/28/22mV/Pa (omni/cardioid/figure-8), ±1dB
• Nominal impedance: 200Ω
• Signal-to-noise ratio (A-weighted, re. 94dB SPL): 79/82/80dB (omni/cardioid/figure-8)
• Max SPL: 127dB (with -10dB pad)
• Powering: 48V phantom
• Weight: approx. 500g