Schoeps BLM 03 C

Boundary-Layer Microphone Capsule


The BLM 03 C is connected through its fixed cable to a Colette CMC microphone amplifier, thus resulting in a complete microphone. All known properties of the BLM 03 C are identical to those of the BLM 3.

It is recommended to use the BLM 03 C when the BLM 3 is too large (for example when recording for TV or film) or too heavy (for example when gluing to the roof inside a vehicle or under the lid of a grand piano).

Since the BLM 03 C includes active electronics, it is not compatible with other active accessories such as RC, KC.


  • can be placed unobtrusively
  • preferred uses: on speaker tables, altars, in a grand piano or as a room microphone
  • only 80 mm in diameter


The small dimensions of the BLM 03 C in combination with the matte gray Nextel surface enable a particularly discreet placement. Even completely invisible placement is possible if the microphone is hidden under a tablecloth made of lightweight fabric.

Due to its small size, however, it should be noted that the BLM 03 C should definitely rest on a sufficiently large, sound-reflecting surface. When recording a panel discussion, a table may be sufficient. For most music recordings a larger area is recommended.

The BLM 03 C can also be mounted in a grand piano with the lid open or closed.


Pickup patternHalf-space
Frequency range20 Hz – 26 kHz with CMC 6 / CMR,

20 Hz – 43 kHz with CMC 6xt

Sensitivity-36 dB (V/Pa), 16 mV/Pa with CMC 6
Equivalent noise level (A-weighted)12 dB with CMC 6
Equivalent noise level (CCIR)23 dB with CMC 6
Signal-to-noise ratio (A-weighted)82 dB with CMC 6
Maximum sound pressure level (THD < 0.5 %)130 dB-SPL with CMC 6
Diameter80 mm
Height8,6 mm
Weight233 g
Surface finishmatte gray


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