Neumann U89I Large Diaphragm FET Consender Microphone - Nickel

The U 89* is a studio microphone for universal applications. The headgrille protects a dual-diaphragm capsule. A rotary switch below the headgrille selects from five different polar patterns. Therefore the microphone can be adapted easily to large sound sources, and those that are spread wide apart, or to sound sources to be recorded at a greater distance. 

The amplifier accepts sound pressure levels up to 134 dB without distortion. This figure can be increased to 140 dB. An additional rotary switch activates a filter that changes the low frequency response either below 80 Hz or 160 Hz frequency.

 

Applications

The U 89 i is similar in appearance to the U 87. It is of smaller size, and lighter weight. It features five instead of three directional characteristics and a higher maximum sound pressure level which make this microphone easier adaptable to different applications.

 

Polar patterns

In addition to the usual directional polar patterns: omnidirectional, cardioid, and figure-8, we have added a hypercardioid and wide-angle cardioid characteristic. When compared to the standard cardioid pattern, the hypercardioid characteristic suppresses sound from the side more efficiently. The wide-angle polar pattern is especially useful to record large sound sources.

 

Acoustic features

The microphone is addressed from the front, marked with the Neumann logo. The large diaphragm capsule has a very smooth frequency response for all polar patterns over a wide acceptance angle. The frequency response curves are flat up to 10 kHz within a pickup angle of ± 100°.  As a result the U 89 i has a very even diffuse-field response for all polar patterns. This is important in a reverberant environment when more reflections arrive at the microphone capsule. The acoustic information is not affected in its tonal quality when recorded by the microphone.  This characteristic is achieved without resorting to corrective resonance effects.  The capsule it is elastically mounted to avoid any structure borne noise that could interfere with its operation.

 

Variable large diaphragm microphone

Pressure-gradient transducer with double membrane capsule

Five directional characteristics: omni, wide angle cardioid, cardioid, hypercardioid, figure-8

Thereby most versatile in all recording situations

Two-stage roll-off filter

Switchable 6 dB pre-attenuation

Extended frequency range in comparison to U 87 Ai

Acoustical operating principle	Pressure gradient transducer
Directional pattern	Omnidirectional, wide angle, cardioid, hypercardioid, figure-8
Frequency range	20 Hz ... 20 kHz
Sensitivity at 1 kHz into 1 kohm	8 mV/Pa
Rated impedance	150 ohms
Rated load impedance	1 kohms
Equivalent noise level, CCIR1)	28 dB
Equivalent noise level, A-weighted1)	17 dB-A
Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL)	66 dB
Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL)	77 dB
Maximum SPL for THD 0.5%2)	134 dB
Maximum SPL for THD 0.5% with preattenuation2)	140 dB
Maximum output voltage	800 mV
Supply voltage (P48, IEC 61938)	48 V ± 4 V
Current consumption (P48, IEC 61938)	0.8 mA
Matching connector	XLR3F
Weight	400 g
Diameter	46 mm
Length	185 mm