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V

ERSIONS

Classis BM 32 B

Half-cardioid, black . . . . . . Order # 489.395

Classis BM 32 W

white . . . . . . . . . . . . . . . . . Order # 489.409

Classis BM 32 SE

silver metallic effect, 
microphone basket made of 
acuraLine

®

Topmesh 

double-layer fine-meshed
wire weave. . . . . . . . . . . . . Order # 489.387

Classis BM 32 E

Half-cardioid, black, 
without pre-amp, 
in conjunction with 
MCS 563 L, MCS 553 L,
MCS-D 3643 . . . . . . . . . . . Order # 721.913

Classis BM 33 B

Half-spherical, black . . . . . . Order # 489.425

Classis BM 33 W

white . . . . . . . . . . . . . . . . . Order # 489.433

Classis BM 33 SE

silver metallic effect, 
microphone basket made of 
acuraLine

®

Topmesh 

double-layer fine-meshed
wire weave. . . . . . . . . . . . . Order # 489.417

Classis BM 34 B

Half-cardioid, black, 
bass roll-off filter . . . . . . . . Order # 489.360

Classis BM 34 W

white . . . . . . . . . . . . . . . . . Order # 489.379

Classis BM 34 SE

silver metallic effect, 
microphone basket made of 
acuraLine

®

Topmesh 

double-layer fine-meshed
wire weave. . . . . . . . . . . . . Order # 489.352

A

PPLICATIONS

The Classis BM 32 / 33 / 34 condenser boundary microphones have
been designed for flush mounting into tabletops or ceilings. The
microphones have been designed for applications such as tele/video 
conferencing, recording or amplification of round table discussions
and wherever the microphone needs to be as unobtrusive as 
possible. 
All microphones feature the innovative Scudio™ technology, 
making the microphones absolutely insensitive to wireless 
communication devices such as mobile phones.
The Classis BM 32 has a half-cardioid polar pattern, which increases
the gain-before-feedback and decreases the amount of diffuse 
ambience. The Classis BM 34 corresponds to the Classis BM 32, but
is provided with a bass roll-off filter. The Classis BM 33 has a half-
spherical polar pattern making it ideal for large rooms. 
The high sensitivity guarantees a constant output level even from
long distance sources. 
Elastic bearing rings achieve mechanical isolation from the mounting
surface and therefore offer effective sound isolation of the micro-
phone. 

F

EATURES

• RFI-proof due to Scudio™ technology
• Classis BM 32/34 with half-cardioid polar pattern 
• Classis BM 33 with half-spherical polar pattern 
• Flat, wide range frequency response
• High-quality reproduction of speech
• Unobtrusive design
• Ceiling or tabletop mounting
• Fast and easy installation

S

UPPLIED

A

CCESSORY

• Elastic bearing rings

I

NSTALLATION

• Mounting hole with elastic bearing rings: Ø 24 mm (15/16")
• Mounting hole without elastic bearing rings: Ø 20 mm (13/16")
• Max. table /ceiling thickness: 57 mm (2.25")

beyerdynamic GmbH & Co. KG 
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. +49 (0) 71 31 / 617 - 0 | Fax +49 (0) 71 31 / 617 - 204
[email protected] | www.beyerdynamic.com

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / BM 32/33/34 (08.12)

Classis BM 32 / 33 / 34

Boundary Microphones

1 of 6

Classis BM 32 B

Classis BM 34 SE

Classis BM 33 B

Summary of Contents for Classis BM 32

Page 1: ...evices such as mobile phones The Classis BM 32 has a half cardioid polar pattern which increases the gain before feedback and decreases the amount of diffuse ambience The Classis BM 34 corresponds to the Classis BM 32 but is provided with a bass roll off filter The Classis BM 33 has a half spherical polar pattern making it ideal for large rooms The high sensitivity guarantees a constant output lev...

Page 2: ...herical Half cardioid Open circuit voltage at 1 kHz 0 dB 1 V Pa 19 mV Pa 34 4 dBV 15 mV Pa 36 5 dBV 19 mV Pa 35 dBV Nominal impedance 200 Ω 200 Ω 200 Ω Load impedance 1 kΩ 1 kΩ 1 kΩ S N ratio rel to 1 Pa 69 dB A 68 dB A 60 dB Noise voltage 6 0 µV A 6 0 µV A Max sound pressure level 107 dB SPL 1 THD 107 dB SPL 1 THD Equivalent SPL 25 dB A 26 dB A 26 dB Phantom supply 8 52 V 8 52 V 8 52 V Current co...

Page 3: ...o www beyerdynamic com Non contractual illustrations Contents subject to change without notice E5 BM 32 33 34 08 12 3 of 6 FREQUENCY RESPONSE POLAR PATTERN This frequency response curve measuring tolerance 2 5 dB and polar pattern correspond to a typical production sample for this microphone Frequency response 2 5 dB 0 dB 19 mV Pa Classis BM 32 Frequency response 2 5 dB 0 dB 19 mV Pa Classis BM 34...

Page 4: ...butors worldwide please go to www beyerdynamic com Non contractual illustrations Contents subject to change without notice E5 BM 32 33 34 08 12 4 of 6 FREQUENCY RESPONSE POLAR PATTERN This frequency response curve measuring tolerance 2 5 dB and polar pattern correspond to a typical production sample for this microphone Frequency response 2 5 dB 0 dB 15 mV Pa Classis BM 33 Classis BM 33 ...

Page 5: ...ation The frequency response shall be 50 Hz 18 kHz The open circuit voltage shall be 19 mV Pa The nominal impedance shall be 200 ohms The lower part of the housing shall provide a 3 pin male XLR connector The total length shall be 76 mm 3 the shaft length shall be 67 mm 2 6 the shaft diameter shall be 20 mm 0 8 M20 x 1 5 thread with fastening nut the head diameter shall be 30 mm 1 2 the length of ...

Page 6: ...ne for tabletops or ceilings The microphone shall be provided with an integrated amplifier and power supply with bass roll off filter The SCUDIO technology shall eliminate inter ferences of other wireless communication devices The microphone shall be powered by phantom power between 8 V and 52 V The filter in the microphone grille shall eliminate wind and pop noise The fully metal housing shall pr...

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