Neumann - BCM 104

Emotion conveyed with technical perfection. Neumann microphones in the Broadcast range have been designed to achieve this ideal. They have been optimized for professional studios broadcast needs, and their functionally optimized design ensures that it is character microphones.

With its large-diameter condenser capsule and cardioid directional characteristic, the BCM 104 is ideal for the faithful reproduction of speech and music. He must, in particular to a flat frequency response up to 3 kHz and then gradually up in the treble. If required, internal switches can compensate for proximity effect or reduce the sensitivity by 14 dB. The BCM 104 is a universal microphone, suitable for a variety of applications: news, roundtables, radio plays, musical recordings ...
Mechanical characteristics
The microphone grille unscrews easily for quick cleaning. Neumann offers optional color-coded grids allowing each facilitator for hygienic reasons to use its own grid. In front of the capsule, mounted on a support frame, a very fine gauze serves as a built-in anti-pop screen.

Broadcast Line range of the microphones also feature a noise-absorbing internal suspension transmitted by the foot, ensuring compatibility with microphone stands articulated specific to broadcast applications.
Acoustic characteristics
The microphone grille features the large diaphragm capsule K 04, with a flat frequency response up to 3 kHz. In acute, the presence of humpback reaches 2 dB.

As mentioned characteristics are obtained without the use of resonance effects, the microphone provides excellent transient response and transmits all acoustic phenomena (music or speech) without any coloration.
Integrated pop screen
The pop screen not only serves to reduce plosives, which cause unpleasant noise when the voice recording; it prevents unwanted body - Sneeze, nicotine, water vapor breathing, food particles ... - to bind to the membrane. It is easily removed without tools for cleaning.
Electrical Characteristics
Instead of an audio transformer, the BCM 104 uses an electronic circuit for coupling the output of the microphone. Like a transformer, this circuit ensures excellent common mode rejection.

Interference appearing on the path of balanced signal are effectively removed.

With a background noise level much reduced - 7 dB (A) only - and a maximum sound pressure level of 138 dB SPL, the BCM 104 has a dynamic range of 131 dB (A-weighted).
Filter and pre-attenuation
The integrated amplifier with 104 BCM provides a linear response down to 20 Hz. An active filter efficiently suppresses signals below this limit. To compensate for proximity effect, the microphone features a high-pass filter electronics, which attenuates frequencies below 100 Hz at a slope of 12 dB / octave.

A pre-selector attenuation 14 dB allows, if necessary, to adjust the microphone output level to circuits designed for dynamic models. Obviously, the noise level will increase accordingly.

These two switches are located inside the microphone, since the activate only once, when the configuration of the studio.
Mounting
The recommended use is to mount the BCM 104 or BCM 705 on one foot standard model pole studio.

A thread adapter, for screwing on different feet models is provided. To ensure effective protection against noise transmitted by the foot, the capsule and the microphone have both an elastic suspension.

The tilt head SG 5, optional, allows tilting +/- 90 degrees of the microphone.
* The design of this microphone is a registered Georg Neumann GmbH in certain countries.