BEYERDYNAMIC MCW-D 531 MCWD531_DB_E.pdf

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. E2/MCW-D 531 (07.09)

MCW-D 531

Delegate Microphone Unit

Order # 486.426

FEATURES

• Fully digital audio and control

• Revoluto Microphone Array Technology

• Corridor characteristic

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

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

• Digitally encoded audio signals prevent unauthorised
listening (128 bit encryption)

• Integrated two-way speakers

• Microphone button for switching the microphone on and off
and requesting to speak

• LED next to the microphone button and LED strips on both
sides of the housing indicate that the participant is requesting
to speak or the microphone unit is in ready-to-talk mode

• Charging contacts

• Power on LED on the rear

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

• High-quality aluminium housing with non-glare, and
scratch-resistant Nextel

®

finish (on the rear) and touch button

(on the front)

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

• The loudspeaker is turned off when the microphone is activated

• Auto-Off function when nobody speaks into the microphone

• 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 ensure immediate use of the
microphone units

• Maximum charging time of 3.5 hours when the battery (NiMH)
is completely empty

• Operating time approx. 30 hours

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MCW-D 531

DESCRIPTION

The MCW-D 531 delegate microphone unit provides a microphone
button in the housing with which the participant can switch the
microphone on or off.
The Revoluto microphone array technology with integrated micro­phone capsules provides a so-called corridor characteristic which
ensures a wide range of good voice quality. The speaker can move
freely, i.e. can stand up or sit down, can move his/her head and
move towards or away from the microphone unit.
With the Automatic Channel Allocation function (ACA) 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 one 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. The ready-to-talk status of the microphone is
indicated by the red LED strips at both sides of the housing. In the
request-to-talk mode of the discussion system the request-to-talk
is received, but the microphone is not yet released. The red flashing
LED indicates that the request-to-talk has been received. The
microphone is released 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 set 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.

The volume of the loudspeaker is adjusted and can be controlled with
the MCW-D 50 control unit or a media control system.
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 a 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 up to 30 hours depending on the amount of
participation in the discussion. As soon as the remaining battery
time is below a selectable 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 also be displayed. The charging time of a completely empty
battery is max. 3.5 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

microphone 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. E2/MCW-D 531 (07.09)

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MCW-D 531

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 usable channels

per system
(Standard: 3)

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

Microphone. . . . . . . . . . . . . . . . . . . . . . Microphone Array

Pick up pattern . . . . . . . . . . . . . . . . . . . Corridor

Power consumption. . . . . . . . . . . . . . . . 67 mA (mic on)

T.H.D. . . . . . . . . . . . . . . . . . . . . . . . . . . < 0.1%

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

channel (average,

duty cycle ≤ 30%)*

Battery voltage . . . . . . . . . . . . . . . . . . . 8 NiMH cells, 2.5 Ah

Charging time

with CD 13 . . . . . . . . . . . . . . . . . . . . . . max. 3.5 hours when the

battery is completely

empty

with CA 2457 . . . . . . . . . . . . . . . . . . . . max. 7 hours when the

battery is completely

empty

Loudspeaker . . . . . . . . . . . . . . . . . . . . . Integrated, two-way

loudspeaker
Loudspeaker switch off at “Mic On” . . . yes

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

not separately adjustable,

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. 30 hours in

discussion mode;

operating time depends

on the volume
Temperature range

(at < 90% humidity) . . . . . . . . . . . . . . . +10 °C – +40 °C

Storage temperature

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

Minimum impedance. . . . . . . . . . . . . . . 8 Ω

Dimensions (L x H x D). . . . . . . . . . . . . . 300 x 82 x 96 mm

Weight . . . . . . . . . . . . . . . . . . . . . . . . . approx. 1100 g

ARCHITECT’S SPECIFICATIONS

Digital wireless delegate microphone unit with Revoluto
Microphone Array technology. One button to switch the microphone
on/off or to enter a request-to-speak. Red LED indicates switched­on status; LED flashing red displays a request-to-talk.
17 microphone capsules in a line array set-up with corridor
characteristic, red LED strips at both sides of the housing indicate the
ready-to-talk status. 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.
Microphone unit addressing via network and storage on unit. 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 up to 30 hours. Processor­controlled charging technology for a charging time of max. 3.5 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 output.
Design aluminium housing. Rear with charcoal-grey, non-glare and
scratch-resistant Nextel

®

finish. Front with touch button.

Dimensions (LxHxD) 300x82x96mm. Weight approx. 1100 g.

Manufacturer: beyerdynamic
Type: MCW-D 531

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

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. E2/MCW-D 531 (07.09)

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MCW-D 531

DIMENSIONS

Front View

Lateral view, rightLateral View, left

82

300

96

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. E2/MCW-D 531 (07.09)

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