Beyerdynamic BM 33 W, BM32-B, BM32-SE, BM32-W, BM33-B Specifications

Classis BM 32 / 33 / 34

Boundary Microphones

Classis BM 32 B

FEATURES

•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

APPLICATIONS

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.

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 halfspherical 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 microphone.

SUPPLIED ACCESSORY

• Elastic bearing rings

Classis BM 33 B

Classis BM 34 SE

VERSIONS

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 . . . . . . . . . . . . .	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

INSTALLATION

•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")

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beyerdynamic GmbH & Co. KG

Theresienstr. 8 | 74072 Heilbronn – Germany

Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 204 [e-mail] | www.beyerdynamic.com

For further distributors worldwide, please go to www.beyerdynamic.com

Non-contractual illustrations. Contents subject to change without notice. E2 / BM 32/33/34 (11.10)

Classis BM 32 / 33 / 34

TECHNICAL SPECIFICATIONS

	Classis BM 32	Classis BM 33	Classis BM 34
Transducer type . . . . . . . . . . . . . . . . . . . . . . . . . .	Condenser . . . . . . . . . . . . . . . . .	Condenser . . . . . . . . . . . . . . . . .	Condenser
Frequency response . . . . . . . . . . . . . . . . . . . . . . .	50 - 18,000 Hz . . . . . . . . . . . . .	50 - 20,000 Hz . . . . . . . . . . . . .	150 - 18,000 Hz
Polar pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Half-cardioid . . . . . . . . . . . . . . .	Half-spherical. . . . . . . . . . . . . . .	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 consumption . . . . . . . . . . . . . . . . . . . . .	2.0 mA . . . . . . . . . . . . . . . . . . .	2.0 mA . . . . . . . . . . . . . . . . . . .	3.4 mA
Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-pin XLR. . . . . . . . . . . . . . . . . .	3-pin XLR. . . . . . . . . . . . . . . . . .	3-pin XLR
Weight (with nut and bearing rings) . . . . . . . . . .	approx. 85 g [0.19 lbs]. . . . . . . .	approx. 85 g [0.19 lbs]. . . . . . . .	approx. 85 g [0.19 lbs]

WIRING DIAGRAMS		DIMENSIONS
Positive pressure produces positive voltage on pin 2.		In millimetres (inches in brackets)
Classis BM 32/33/34		Classis BM 32

Classis BM 32 E	Classis BM 33

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beyerdynamic GmbH & Co. KG

Theresienstr. 8 | 74072 Heilbronn – Germany

Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 204 [e-mail] | www.beyerdynamic.com

For further distributors worldwide, please go to www.beyerdynamic.com

Non-contractual illustrations. Contents subject to change without notice. E2 / BM 32/33/34 (11.10)