Beyerdynamic MCW-D 521 User Manual

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 224
[e-mail] | www.beyerdynamic.de

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / MCW-D 521 (11.09)

MCW-D 521

Wireless, digital Delegate Microphone Unit
with Loudspeaker

Order # 479.748

FEATURES

• Direct Sequence Spread Spectrum (DSSS) provides high immunity
from interference and unauthorised listening

• Wireless transmission with integrated transmitting/receiving
antenna in the 2.4 GHz frequency band which is approved
world-wide

• Digitally encoded audio signals prevent unauthorised listening

• Integrated loudspeaker with voice equalisation

• Gooseneck microphone provides excellent audio quality

• Red illuminated ring around the gooseneck to indicate the
ready-to-talk status of the microphone

• Microphone button to switch the microphone on / off or to
register it in the system

• Dual colour LED for microphone ON (red: communication is
established; green: microphone is switched on and ready for
talking)

• DC-connection for DC-operation and battery charging

• Charging contacts

• Power on LED

• Mini stereo jack (3.5 mm) as documentation output for the
connection of recorders, PCs with the steno-s recording software etc.

• High-quality plastic housing with charcoal-grey, non-glare and
scratch-resistant Nextel

®

finish

• The following parameters can be programmed: loudspeaker
level, auto-off behaviour and voice-controlled activation

• Auto-Off function when nobody speaks into the microphone

• Fixed ducking level of -15 dB for the loudspeaker when the
microphone is activated

• Microphone unit can be programmed by using the configuration
software with the control unit

• APO function for Automatic Power OFF when the control unit
is in the stand-by mode or switched off

• Processor-controlled charging electronics to prevent the
“memory effect” of the battery

• Reliable charging electronics ensures immediate use of the
microphone units

• LED ring of the gooseneck microphone indicates charging status

• Maximum charging time of 2 hours when the battery (NiMH) is
completely empty

• Operating time approx. 20 hours

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MCW-D 521

DESCRIPTION

The MCW-D 521 delegate microphone unit is equipped with a
microphone button in the housing with which the participant can
switch his microphone on and off. With the Automatic Channel
Allocation function the transmitting channels of the microphone
units are allocated automatically. When the microphone button is
pressed in the manual operating mode the request-to-talk is
received by the control unit (a possible external dual colour LED will
illuminate red). Then the control unit checks which of the available
receiving channels is free. Then the control unit informs the micro­phone unit which channel it should use for transmitting. When the
channel of the microphone unit is set and checked by the control
unit, the microphone is switched on (dual colour LED changes from
red to green). The ready-to-talk status of the microphone is also
indicated by the red ring around the gooseneck microphone. In the
Request-to-Talk-mode of the discussion system the request-to-talk
is received, but the microphone is not switched on. The red LED
indicates that the request-to-talk has been received. The micro­phone is switched on by the operator at the PC by using the
“MCW-D 50 Conference” software or a media control system.
When the microphone button is pressed once again, the delegate
clears his/her request-to-talk.

Depending on the configuration with the “MCW-D 50 Conference”
software the following operating modes are available:
Override: the first microphone is switched off, when the maximum
number of switched on microphones is exceeded.
Voice activation: the microphone is switched on, when someone
speaks into it.
Push-To-Talk: the microphone button is held down, while the
participant is speaking.

The integrated loudspeaker reproduces the audio signal of the
whole conference system. Depending on the audio signal routing in
the control unit the loudspeaker can reproduce other audio signals
such as a wireless microphone in the auditorium.

The parameters of the microphone unit are adjusted via PC by using
the “MCW-D 50 Conference” software. The parameters are
adjusted for all microphone units.
If a participant forgets to switch off his/her microphone and if nobody
speaks into the microphone, the “Auto-Off” function switches

the microphone off. The time when the “Auto-Off” function will
be activated and the sensitivity can be configured. A headphone
(e.g. DT 1) can be connected to the documentation output. The
volume of the loudspeaker is adjusted and can be controlled with the
MCW-D 50 control unit or a media control system. The ducking level
determines the attenuation of the loudspeaker level when
the microphone of the microphone unit is switched on. Each
microphone unit has its own address. An existing system can be
complemented at any time.

The DSSS-transmission provides high immunity against unauthorised
listening. In addition to this, a conference system including the
appropriate microphone units can be protected with an 8-digit
alphanumeric code. A microphone unit that does not have the
correct code will be identified by the control unit and switched off
immediately.

The integrated rechargeable battery allows an operation of the
microphone unit for approx. 20 hours depending on the amount
of participation in the discussion. As soon as the remaining battery
time is below a certain threshold of 1 hour, the power on LED on the
rear of the microphone unit will flash or if the system is controlled
by PC or a media control system, the low battery capacity can be
also indicated. The charging time of a completely empty battery is
around 2 hours with the integrated processor-controlled charging
electronics. Depending on the use of the microphone unit the
charging time can be less.
As an option the microphone unit can be powered and charged by
a DC power supply adapter.

The microphone unit is switched on by briefly pressing the micro­phone button once. There are various ways to switch off the
microphone unit:

1. Press the microphone button for 3 seconds.

2. Press the standby button of the MCW-D 50 control unit for

3 seconds to switch off all activated microphone units.

3. Switch off all microphone units via an RS 232 or TCP/IP

command from the PC or media control system.

4. Switch off the control unit; after approx. 3 minutes the micro-

phone unit will be switched off.

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 224
[e-mail] | www.beyerdynamic.de

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / MCW-D 521 (11.09)

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ARCHITECT’S SPECIFICATIONS

Digital wireless delegate unit with one button to switch the micro­phone on/off or to register the request to talk. DSSS modulation
(Direct Sequence Spread Spectrum) ensures high immunity from
interference. World-wide approval for the 2.4 GHz frequency band.
Integrated loudspeaker with voice equalisation for decentralised sound
reinforcement. ACA - Automatic Channel Allocation via integrated,
digital transceiver. Dual colour LED: green indicates switched on
microphone; red indicates a request-to-talk. Cardioid condenser
gooseneck microphone (back electret). Gooseneck length: 400 mm;
gooseneck diameter: 6 mm. Illuminated ring to indicate the ready­to-talk condition. Using the configuration software with a PC it is
possible to adjust and configure the volume of the loudspeaker,
threshold for voice activation and auto-off-switching. Integrated
rechargeable NiMH battery ensures an operating time of approx.

20 hours. Processor-controlled charging technology for a charging
time of 2 hours without memory effect. The battery is monitored by
the control unit and an LED indicates when the capacity is too low.
2 charging contacts. Mini jack socket (3.5 mm) as documentation
or headphone output. DC-connection for recharging the battery or
powering the microphone unit with an external power supply unit.
High-quality plastic housing with charcoal-grey, non-glare and
scratch-resistant Nextel

®

finish. Integrated antenna.

Dimensions (Width x Height x Depth) 156.5 x 52 x 191 mm. Weight:

1.7 kg

Manufacturer: beyerdynamic
Type: MCW-D 521

MCW-D 521

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 224
[e-mail] | www.beyerdynamic.de

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / MCW-D 521 (11.09)

3 of 6

TECHNICAL SPECIFICATIONS

General

Frequency range . . . . . . . . . . . . . . . . . . . 2400 - 2483.5 MHz

(ISM-band)

Modulation. . . . . . . . . . . . . . . . . . . . . . . Direct Sequence Spread

Spectrum DSSS, digital

signal processing acc.

to own standard

Max. number of audio streams . . . . . . . . 9 useable channels per

system

Signal-to-noise ratio . . . . . . . . . . . . . . . . 80 dB typ., (unweighted

signal-to-noise ratio)
Range between microphone units

and control unit . . . . . . . . . . . . . . . . . . . > 100 m

Power supply . . . . . . . . . . . . . . . . . . . . . 110 - 240 V AC 50/60 Hz

Approval. . . . . . . . . . . . . . . . . . . . . . . . . world-wide

Microphone Units

Transmitter power. . . . . . . . . . . . . . . . . . max. 15 dBm per

channel (average,

duty cycle ≤ 30%)*

Battery voltage . . . . . . . . . . . . . . . . . . . . 8 NiMH cells, 1600 mAh

External DC operation. . . . . . . . . . . . . . . 18 V DC (±0.5 V),

residual hum < 20 mV,

400 mA

Loudspeaker . . . . . . . . . . . . . . . . . . . . . . Wide-band, integrated

loudspeaker
Volume decrease when

Mic On (“Ducking”) . . . . . . . . . . . . . . . . 15 dB fixed setting

AF output . . . . . . . . . . . . . . . . . . . . . . . . Documentation output,

unbalanced jack socket

(3.5 mm, stereo)

Connection. . . . . . . . . . . . . . . . . . . . . . . Tip = AF+

Ring = AF ­Shield = ground

Output level . . . . . . . . . . . . . . . . . . . . . . max. 2.4 V rms on open

circuit, T.H.D. < 1%

2.3 V rms at 80 Ω load,

T.H.D. < 1%

Min. impedance . . . . . . . . . . . . . . . . . . . 600 Ω

Integrated limiter against clipping . . . . . . cannot be switched off

Limiter activity at . . . . . . . . . . . . . . . . . . 126 dB SPL

Power supply . . . . . . . . . . . . . . . . . . . . . 9.6 V with integrated

NiMH battery (8 cells)
Operating time depending on

the type of the microphone unit . . . . . . . approx. 20 hours in

discussion mode;

operating time depends

on the volume
Temperature range

at < 90% humidity . . . . . . . . . . . . . . . . . +10° - +40°C

Storage temperature

at < 90% humidity . . . . . . . . . . . . . . . . . -20° - +55°C

Dimensions (without microphone)

Length . . . . . . . . . . . . . . . . . . . . . . . . . . 191 mm

Width . . . . . . . . . . . . . . . . . . . . . . . . . . . 156.5 mm

Height . . . . . . . . . . . . . . . . . . . . . . . . . . 52 mm

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 kg

*The transmitter power can differ from this value due to specific
regulations in various countries.

MCW-D 521

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 224
[e-mail] | www.beyerdynamic.de

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / MCW-D 521 (11.09)

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OPTIONAL ACCESSORIES

CA 2475 Microphone stand, 3/8",

adjustable height 870 - 1575 mm,
with heavy base plate and plate where
to place MCW-D or MCS

microphone units, basalt grey . . . . Order # 472.212

CA 2457 Charger/DC power supply unit

for MCW-D 5** microphone

units . . . . . . . . . . . . . . . . . . . . . . . Order # 479.721

WIRING DIAGRAM

SHM 214 C 03 MICROPHONE

REAR VIEW CASING

Charging contacts

DC connection

Operating
control LED

Mini stereo jack for the
connection of recorders or
headphones

MCW-D 521

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 224
[e-mail] | www.beyerdynamic.de

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / MCW-D 521 (11.09)

5 of 6

DIMENSIONS CASING

Top view

Lateral view

MCW-D 521

beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 224
[e-mail] | www.beyerdynamic.de

For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5 / MCW-D 521 (11.09)

6 of 6

EXPLODED VIEW