Neumann BCM 104

Neumann BCM 104

Broadcast Microphone

Neumann O410

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 Neumann BCM 104 Broadcast Microphone

Neumann BCM 104
Product Code: BCM104
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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.

With its large-diaphragm condenser capsule and cardioid directional characteristic, the BCM 104 is ideal for the faithful reproduction of speech and music. This is due, for instance, to the frequency response that is flat up to 3 kHz and then gradually boosted in the higher frequencies. If required, internal switches can be used to compensate for the proximity effect and to reduce the sensitivity by 14 dB. The versatility of the BCM 104 can be seen in its wide range of applications, from news, to round-table discussions, to radio plays, to musical recordings.

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 microphone headgrille houses the K 04 large-diaphragm capsule, which has a flat frequency response up to 3 kHz. Higher frequencies have an increased presence up to 2 dB.

Since the above-mentioned microphone characteristics are obtained without the use of resonance effects, the microphone features excellent transient response and transmits all transient phenomena of music and speech without any coloration.

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.

Electrical features
Instead of a transformer to couple the microphone output to the supply voltage, the BCM 104 has an electronic circuit which, like a transformer, provides for good common mode rejection.

Interference induced in the balanced modulation line is thus suppressed effectively.

With a very low self-noise of 7 dB(A), and an overload capability extending to 138 dB SPL, the BCM 104 has a dynamic range of 131 dB (A-weighted).

Filter and Preattenuation
The BCM 104 amplifier has a linear operation down to 20 Hz. An active filter efficiently suppresses signals below this frequency. In order to compensate for the proximity effect, an electronic high-pass filter, activated by a switch, is built into the microphone. This filter reduces frequencies below 100 Hz by 12 dB/octave.

A 14-dB preattenuation switch is provided in order to adjust the sensitivity, if necessary, to circuits designed for dynamic microphones. But this will increase the self noise accordingly.

Both switches are located inside the microphone housing, since they will normally be operated only once, when the broadcasting facility is set up.

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.
Large-diaphragm condenser capsule
Cardioid directional characteristic
Characteristic, functionally optimized design*
Integrated 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
Internal switches: high-pass and pre-attenuation
Acoustical operating principle Pressure gradient transducer
Directional pattern Cardioid
Frequency range 20 Hz ... 20 kHz
Sensitivity at 1 kHz into 1 kohm 22 mV/Pa
Sensitivity at –14 dB attenuation 4.4 mV/Pa
Rated impedance 50 ohms
Rated load impedance 1 kohms
Equivalent noise level, CCIR1)  18 dB
Equivalent noise level, A-weighted1) 7 dB-A
Maximum SPL for THD 0.5%2) 138 dB
Maximum SPL for THD 0.5% with preattenuation2) 152 dB
Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL) 76 dB
Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL) 87 dB
Maximum output voltage 10 dBu
Dynamic range of the microphone amplifier (A-weighted) 131 dB
Supply voltage (P48, IEC 61938) 48 V ± 4 V
Current consumption (P48, IEC 61938) 3.2 mA
Matching connector XLR3F
Weight 500 g
Diameter 64 mm
Length 85 mm
Height (without suspension) 110 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 |