Neumann BCM-705 Large Diaphragm Dynamic Broadcast Microphone

The first Neumann microphone with a dynamic capsule. Functionally optimized design specifically for the broadcast field, featuring integrated pop protection, suppression of structure-borne noise and a hypercardioid directional characteristic.

Emotion conveyed with technical perfection. This is the ideal which the Neumann microphones in the Broadcast Line have been designed to fulfill. The fine-tuning to the requirements of professional broadcast studios and the individual, functionally optimized design* ensure that these are microphones of character.

The BCM 705 is Neumann’s first dynamic microphone. The housing and headgrille are identical to those of the BCM 104; only the green logo indicates that this is something new from Neumann. The principle of reduction to the essentials can be seen in the dynamic capsule with a hypercardioid directional characteristic, specifically designed for speech reproduction at close range. Multi-level isolation from structure-borne noise ensures operation free of interference, even in a lively studio environment.

Features:

Dynamic capsule
Hypercardioid directional characteristic
Characteristic, functionally optimized design
Integrated, neutral pop protection
Integrated elastic suspension
Individual headgrilles for different users
Colored rings to identify the replacement headgrilles
Easy removal and cleaning of microphone headgrille (with bayonet mount)
Mechanical compatibility with standard studio boom arms
Multi-level isolation from structure-borne noise
No power supply required

Acoustical operating principle	Pressure gradient transducer
Directional pattern	Hypercardioid
Frequency range	20 Hz ... 20 kHz
Sensitivity at 1 kHz into 10 kohm	1,7 mV/Pa = –55,4 dB ± 1 dB
Rated impedance	200 ohms
Rated load impedance	>= 10,000 ohms
Equivalent SPL CCIR 468-3	32 dB
Equivalent SPL DIN/IEC 651	18 dB-A
S/N ratio CCIR 468-3	62 dB
S/N ratio DIN/IEC 651	76 dB
Weight	500 g
Diameter	64 mm
Length	85 mm
Height (without suspension)	110 mm

Mechanical Features
The microphone headgrille twists off easily for quick cleaning. Neumann offers optional, color-coded headgrilles so that, for reasons of hygiene, each announcer can use his or her individual headgrille. In front of the capsule, mounted on a frame holder, a fine gauze serves as a built-in popscreen.

The microphones of the Broadcast Line have an elastic mount against structure-borne noise, that is compatible with standard broadcast-segment microphone arms.

Acoustic features
The frequency response has a light treble boost, in the region from 2 kHz to 9 kHz, aiding the speech intelligibility. The bass frequency response is designed to compensate for the overemphasis of the bass caused by the proximity effect.

The integrated Pop Screen
A pop screen not only prevents the occurrence of plosive pop noises in vocal recordings, but also efficiently prevents unwanted particles, from respiratory moisture, nicotine, to food remnants, from settling on the diaphragm. The pop screen can be removed for cleaning without the use of tools.

Mounting
The preferred mode of operation is to suspend the BCM 104 or BCM 705 from a standard studio boom arm.

A thread adapter to fit different connector threads is included. In order to provide protection from structure-borne noise, both the capsule and the microphone in its mount are elastically suspended.

The optional SG 5 swivel mount allows additional angling of the microphone by +/-90 degrees.

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Neumann BCM-705 Large Diaphragm Dynamic Broadcast Microphone

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