Neumann USM 69 i

Neumann USM 69 i

Stereo Microphone

Neumann O410

Home > Neumann > Current Microphones > USM 69 i

 Neumann USM 69 i Stereo Microphone

Neumann USM 69i
Product Code: USM69i
Buy Sell Sales Neumann USM 69

 

The USM 69 i stereo microphone has two separate dual-diaphragm capsules. These are mounted vertically and rotate against each other. The directional polar patterns can be selected separately for each capsule. The capsules operate independently from each other.

Applications
The USM 69 i condenser stereo microphone is a studio microphone for intensity stereo recording. It is suitable for XY and MS recordings.

Construction
The microphone consists of the amplifier section and the capsule head. The amplifier section contains two microphone amplifiers operating independently from each other. They have an extremely low self noise.

Two completely separate microphone capsules are positioned closely above each other within the capsule head. Their diaphragms are made out of gold-sputtered polyester film. The upper capsule rotates against the lower one over a range of 270. Color markings on the lower capsule system help to identify the angle by which the upper capsule has been rotated.

When sound waves reach the microphone capsules from different directions they will generate audio signals with different intensity only, but not with time differences, since the capsules are in close proximity and the sound arrives at both capsules simultaneously. The result is an intensity stereo signal that can be summed together for excellent mono compatibility without causing interference.

Polar patterns
The USM 69 i has two built-in rotary switches. The five polar patterns of both capsules can be selected at the microphone itself. Therefore, no special AC power supply units or powering adapters are necessary.

The two outputs attach directly to any 48 V phantom powered connectors.

In addition to the usual polar patterns: omnidirectional, cardioid, and figure-8, we have added a hypercardioid and a wide-angle cardioid pattern.

A built-in DC converter generates the required capsule polarizing voltages.

Electrical features
The amplifiers feature high output capability and extremely low self noise. Distant sound sources, as well as very loud sound sources at close range can therefore be recorded without any problem.

Each amplifier has an active filter. It effectively suppresses subsonic interference as caused by wind or structure borne noise. At the same time, the filter prevents the output transformers from overloading through very low frequency energy.

Use as a mono microphone
The microphones may also be used as completely independent mono microphones. There are many applications when it is important to have a second mono microphone as a backup, or when the outputs of microphones with different polar response characteristics must be available simultaneously.

The outputs of the two microphone channels can be linked (cascaded). In addition to the individual directional patterns, other characteristics are available through the combination of both channels.

Operational safety
Both microphone systems operate completely independent from each other.

The second amplifier will be unaffected, even in case of a faulty ground of the supply voltage for one of the channels, or a short circuit in one of the outputs.

The microphone is reliable in mono usage, even if only one of the systems is operated and connected. Its simple and redundant circuitry guarantees a low failure rate.

Should the DC converter ever fail, a diode circuit within the microphone ensures that both systems will remain operational. The cardioid pattern is automatically chosen. The sensitivity is reduced by 3 dB.
Switchable stereo microphones
Two pressure-gradient transducers with double membrane capsules
MS- or XY-stereophony
Capsules rotary by 270
Very low noise
Aperture and pick-up angles freely choosable
Directional characteristics reproducibly switchable, omni, wide angle cardioid, cardioid, hypercardioid, figure-8
Acoustical operating principle Pressure gradient transducer
Directional pattern Omnidirectional, wide-angle cardioid, cardioid, hypercardioid, figure-8
Frequency range 20 Hz ... 20 kHz
Sensitivity at 1 kHz into 1 kohm 13 mV/Pa
Rated impedance 150 ohms
Rated load impedance 1 kohms
Equivalent noise level, CCIR 24 dB
Equivalent noise level, A-weighted 13 dB-A
Signal-to-noise ratio, CCIR (rel. 94 dB SPL) 70 dB
Signal-to-noise ratio, A-weighted (rel. 94 dB SPL) 81 dB
Maximum SPL for THD  0.5 % 132 dB
Maximum output voltage 3 dBu
Dynamic range of the microphone amplifier (A-weighted) 119 dB
Supply voltage (P48, IEC 61938) 48 V ± 4 V
Current consumption (P48, IEC 61938) 2 x 0.7 mA
Matching connector  XLR5F
Weight 510 g
Diameter 30 + 48 mm
Length 293 mm
 

 

 
Products
Studio Monitor Systems
Current Microphones
BCM 104 KM D
BCM 705 KMR 81 i
D-01 KMR 81 D
KK104S / KK105S KMR 82 i
KK 204 /
KK 205
KMS104 / KMS105
KM 120 KMS 104 D / KMS 105 D
KM 130 KU 100
KM 131 M 147 Tube
KM 140 M 149 Tube
KM 143 M 150 Tube
KM 145 TLM 102
KM 150 TLM 103
KM 183 TLM 103 D
KM 184 TLM 107
KM 185 TLM 170R
KM 183A TLM 193
KM 184A TLM 49
KM 185A TLM 67
KM 133D U 87 Ai
KM 183D U 89 i
KM 184D USM 69 i
KM 185D U 47 fet
KM A  
Current Accessories

Neumann 18112014
Studio Monitor Systems - KH 420 | O 410 | KH 310D | KH 310A | KH 120D | KH 120A | M 52 | KH 870 | KH 810 |
Current Microphones - BCM 104 | BCM 705 | D-01 | KK104S / KK105S | KK 204 / KK 205 | KM 120 | KM 130 | KM 131 | KM 140 | KM 143 | KM 145 | KM 150 | KM 183 |
KM 184 | KM 185 | KM 183A | KM 184A | KM 185A | KM 133D | KM 183D | KM 184D | KM 185D | KM A | KM D | KMR 81 i | KMR 81 D | KMR 82 i | KMS104 / KMS105 |
KMS 104 D / KMS 105 D | KU 100 | M 147 Tube | M 149 Tube | M 150 Tube | TLM 102 | TLM 103 | TLM 103 D | TLM 107 | TLM 170R | TLM 193 | TLM 49 | TLM 67 |
U 87 Ai | U 89 i | USM 69 i | U 47 fet |
Current Accessories - AC 20 | AC 21 | AC 22 | AC 23 | AC 25 | AC 26 | AC 27 | AC 28 | AC 29 | AC 30 | AK 20 | AK 30 | AK 31 | AK 40 | AK 43 | AK 45 | AK 50 |
BCK | BS 48 i | BS 48 i-2 | Conn Kit AES/EBU | Conn Kit S/PDIF | USB - RS 485 | DMI-2 Portable | DMI 8 | DS 100-1 | DS 120 | EA 1 (mt) | EA 170 (mt) | EA 2 (mt) |
EA 2124 A (mt) | EA 4 (bk) | EA 87 (mt) | EA 89 A (mt) | IC 3 (mt) | IC 4 (mt) | IC 5 (mt) | IC 6 (mt) | IC 7 | K 11 | K 3 x 0.08 | K 3 x 0.2 | K 5 x 0.14 | K 7 X 0.14 |
KA 100 | KK 120 (nx) | KK 131 (nx) | KK 133 (nx) | KK 143 (nx) | KK 145 (nx) | KK 183 (nx) | KK 184 (nx) | KK 185 (nx) | KM 100 | KM A (nx) | KM D (nx) | KT 5 | KT 8 |
KVF 118 KA | KVF 158 KA | KVFF 148 KA | KVG 1120 nx | KVG 130 nx | KVG 160 nx | LC 2 | LC 3 KA | LC 4 | M 210/1 | M 212 c | M 214/1 | M 252 | MCA-ES | MF 2 |
MF 3 | MF 4 | MF 5 | MF-AK | MNV 100 | MNV 21 mt | MNV 87 mt | MTX 191 A | MZEF 8060/8120 | MZGE 8000 | MZGE 8002 | N 149 A | N 248 | PA 100 | PS 15 | PS 20 a |
SBK 130 A | SG 100 | SG 100-1 | SG 105 | SG 109 | SG 110 nx | SG 2 | SG 21 bk | SG 287 | SG 289 | SG 5 | SG-AK | SGE 100 | SMK 100 A | SR 100 | STH 100 | STH 120 |
STV 4/20/40/60 | TF 221 C | WKD-AK | WKE 191 Set | WKE 81 Set | WKE 82 Set | WNS 100 | WNS 110 | WNS 120 | WS 100 | WS 2 | WS 47 | WS 69 | WS 81 | WS 82 | WS 87 |
WS 89 | WSB | Z 26 mt |