User manual for Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT
- Manufacturer: Neumann
- Basic description and contents of package
- Product classification: Pro Audio - Recording - Large Diaphragm Condenser
- Safety instructions
- Startup and operation of the large diaphragm condenser
- Tips for setting up your Neumann
- Settings and expert assistance
- Contact Neumann service
- Warranty information
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User manual for the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT
The user manual for the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT provides
necessary instructions for the proper use of the product Pro Audio - Recording - Large Diaphragm Condenser.
The black USM 69 i Variable-Pattern Stereo Microphone from Neumann is a microphone with 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.
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.
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 48V phantom-powered connectors. In addition to the usual polar patterns (omnidirectional, cardioid, and figure-8), this microphone has a hypercardioid and a wide-angle cardioid pattern. A built-in DC converter generates the required capsule-polarizing voltages.
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.
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. 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 provides 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.
If you own a Neumann large diaphragm condenser and have a user manual in electronic form,
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You can upload and download the manual for the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT in the following formats:
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Additional parameters of the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT:
| Operating Principle || Pressure Gradient |
| Transducer || Condenser |
| Polar Pattern || Cardioid, Figure 8, Hypercardioid, Omnidirectional, Wide-Angle Cardioid |
| Frequency Range || 20 Hz to 20 kHz |
| Signal to Noise Ratio || 70 dB CCIR |
81 dB A-Weighted
| Equivalent Noise Level || 24 dB CCIR |
13 dB A-Weighted
| Maximum SPL || 132 dB SPL 0.5% |
| Impedance || 150 ohms |
| Load Impedance || 1 kOhms |
| Sensitivity || 13 mV/PA @ 1 kHz into 1 kOhms |
| Power Requirements || 48 V+/- 4 V |
| Output Connectors || Not Specified By Manufacturer |
| Operating Current Consumption || 0.7 mA |
| Length || 11.54" (293 mm) |
| Diameter || 1.89" (48 mm) |
| Weight || 1.12 lb (510 g) |
| Package Weight || 2.55 lb |
| Box Dimensions (LxWxH) || 13.1 x 5.1 x 1.9" |
The user manual for the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT can be downloaded in .pdf
format if it did not come with your new large diaphragm condenser, although the seller is
required to supply one. It is also quite common that customers throw out
the user manual with the box, or put the CD away somewhere and then can’t find it.
That’s why we and other Neumann users keep a unique electronic library
for Neumann large diaphragm condensers,
where you can use our link to download the user manual for the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT.
The user manual lists all of the functions of the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT,
all the basic and advanced features and tells you how to use the large diaphragm condenser.
The manual also provides troubleshooting for common problems. Even greater
detail is provided by the service manual, which is not typically shipped with the product,
but which can often be downloaded from Neumann service.
If you want to help expand our database, you can upload a link to this website
to download a user manual or service manual, ideally in .pdf format. These pages
are created by you – users of the Neumann USM 69 i Variable-Pattern Stereo Microphone USM 69 I MT. User manuals are also
available on the Neumann website under Pro Audio - Recording - Large Diaphragm Condenser.
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