Beyerdynamic Classis BM 52 Specifications

Classis BM 52

Boundary Microphone

FEATURES

• Semi-cardioid polar pattern

• RFI-proof due to Scudio™ technology

• ON/OFF, Push-To-Talk and Push-To-Mute function

• Silent membrane key with braille inscription

• High-quality non-glare design

• Linear frequency response with high bandwidth

• LED indicator

• Switchable bass roll-off filter in two stages

• High gain-before-feedback

TECHNICAL SPECIFICATIONS

Transducer type . . . . . . . . . . . . . . . . Condenser (back electret)

Operating principle. . . . . . . . . . . . . . Pressure gradient

Frequency response . . . . . . . . . . . . . 45 - 20,000 Hz

Polar pattern . . . . . . . . . . . . . . . . . . Semi-cardioid

Open circuit voltage . . . . . . . . . . . . . 13.3 mV/Pa = -37.5 dBV

Nominal impedance . . . . . . . . . . . . . < 200 Ω

Nominal output impedance . . . . . . . ≥ 1 kΩ

Max. SPL at 1 kHz. . . . . . . . . . . . . . . 114.2 dB

Dynamic range. . . . . . . . . . . . . . . . . 84 dB

Signal-to-noise ratio . . . . . . . . . . . . . 63.8 dB dBA, RMS

Noise voltage . . . . . . . . . . . . . . . . . . 8.4 µV [A, RMS]

A-weighted equivalent SPL. . . . . . . . 30.2 dB [A]

Power supply . . . . . . . . . . . . . . . . . . Phantom supply

P48 (+48 VDC ±4 VDC, 6.8 kΩ ±20%)
P24 (+24 VDC ±4 VDC, 1.2 kΩ ±20%)

P12 (+12 VDC ±4 VDC, 680 Ω ±20%)

Current consumption . . . . . . . . . . . . approx. 5.6 mA

Dimensions without connector

(L x W x H) . . . . . . . . . . . . . . . . . . . . 105 x 76 x 25 mm

[4.13" x 2.99" x 0.98"]

Weight without cable. . . . . . . . . . . . 147 g [5.19 oz]

Weight with cable . . . . . . . . . . . . . . 292 g [10.30 oz]

APPLICATIONS

The Classis BM 52 is a very versatile condenser boundary
microphone with many different useful functions.
Depending on the application, you can choose between the
operating modes ON/OFF, Push-To-Talk (PTT) and Push-To-Mute
(PTM). In order to suppress low frequency noise, the frequency
response can be tailored for use with a two-stage bass roll off filter.
The Classis BM 52 is operated with a silent membrane key with
braille inscription. An LED indicates the ready-to-speak status.
The robust housing with a high-quality design is covered with a
very exclusive, dust repellent fabric. Due to its matt, non-glare
surface, the Classis BM 52 can discretely be integrated into each
installation.
It has all possibilities of an intelligent desktop microphone unit. It
can be used anywhere, where little space is available, but a high
functionality is required. It is ideal for round table discussions,
tele/video conferences or distance learning.
The increase of the sound pressure at a boundary results in a higher
gain, signal-to-noise ratio and comb filter effects cannot occur.
The Classis BM 52 RC is available with a remote control. The
microphone can be activated by an external button (operator). The
built-in membrane key can be turned off. An external device (e.g.
video camera) can be controlled with a MOSFET output.
The Classis BM 52 is available in matt black.

VERSIONS

Classis BM 52 black, integrated pre-amp,

3 m cable with 3-pin male

XLR connector . . . . . . . . . Order # 729.442

Classis BM 52 RC black, integrated pre-amp,

3 m cable with 5-pin male

XLR connector . . . . . . . . . Order # 729.450

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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 / Classis BM52 (07.16)

Classis BM 52

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 curve ± 2.5 dB Classis BM 52 RC 0 dB = 13.3 mV/Pa

orizontal, 60° Elevation

H

WIRING DIAGRAMS

Classis BM 52

Vertical

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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 / Classis BM52 (07.16)

vertical

Classis BM 52 RC

rt = red / rouge
bl = blue / bleu
sw = black / noir
ws = white / blanc
br = brown / brun