Specifications

20
Boundary-Layer Capsules
Miniature Boundary-Layer Capsule
BLM 03 Cg
– pressure transducer with hemi spherical pattern
– active miniature version of the BLM 3g
– unobtrusive, for a very wide range of recording
applications
– often preferred for room pickup or for placement on
podiums or speakers' tables
The BLM 03 Cg offers all the recognized advantages
of the BLM 3g, while its smaller size permits more
unob trusive microphone placement. Its shallow profile
and circular shape can often be disguised or hidden,
e.g. under a light tablecloth. It is recommended in those
cases where the BLM 3g is too large (e.g. for TV or
film sound) or too heavy, e.g. for mounting in the
interior of a car under the roof, or beneath the lid of a
piano:
An Active Cable hard-wired to the BLM 03 Cg allows
it to be joined to any micro phone amplifier of the
Colette series (except the CMBI) to become a complete
microphone. The Active Filter CUT may also be added.
Any boundary-layer microphone must be placed on a
sound-reflecting surface large enough for adequate
low frequency pickup. A table top may suffice for
speech applications such as conference recording, but
most setups for music recording will require a larger
surface.
Dimensions: diameter: 80 mm,
max. height: ca. 8.6 mm
Cable length: 5 m
Weight without microphone amplifier CMC: 233 g
Surface finish: matte gray (g)
Accessories (included): polished wood case
BLM 03 Cg
with microphone amplifier CMC 6Ug
Frequency range: 20 Hz – 20 kHz
Sensitivity: 19 mV/Pa
Equivalent noise level:
A-weighted*: 12 dB-A
CCIR**: 23 dB
Signal-to-noise ratio
(A-weighted)*: 82 dB-A
Maximum SPL: 128 dB (0.5% THD)
Frequency response curve BLM 03 Cg + CMC 6
Polar diagram
from outer
to inner:
up to 2 kHz 4 kHz
8 kHz
16 kHz
20 50 100 200 500 1k 2k 5k 10k 20kHz
+10
0dB
-10
-20
*IEC 61672-1, **IEC 60268-1
COLETTE
modular
hemishpere