MZA 900 P
Bedienungsanleitung
Instructions for use
Notice d‘emploi
Istruzioni per l‘uso
Instrucciones para el uso
Gebruiksaanwijzing
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MZA 900 P
The MZA 900 P phantom power adaptor is used to
connect pre-polarized condenser microphones with a
3.5 mm jack plug or a 3-pin special socket to microphone
inputs with 10 – 52 V phantom powering (P12 – P48).
The connected microphone is supplied via the adaptor.
The possible combinations between the MZA 900 and
Sennheiser microphones are as follows:
MZA 900 P
908 B
908 D
HSP 2 ew
HSP 4 ew
ME 2
ME 3
ME 4
MKE 2 ew gold
MKE 40 ew
MZA 900 P -4
ME 1021
ME 1042
ME 105²
HSP 2
HSP 4
HS 2
MKE 2-4
MKE Platinum-4-C
1in conjunction with KA 100 S-4
²in conjunction with KA 100-4
The adaptor is also a quick and flexible solution if a
microphone is to be used for both wired and wireless
applications. One and the same microphone can be used
together with the MZA 900 P(-4) for wired applications
(e.g. in the studio) or with a bodypack transmitter (e.g.
on stage).
The MZA 900 P can also be used as a cable tester for XLR
microphone cables (see page 5).
1
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Delivery includes
y
y
y
MZA 900 P with belt clip
Instructions for use
Warranty certificate
Connecting the microphone
Connect the jack plug of the
microphone to the socket of
the MZA 900 P. Lock the jack
plug by screwing down the
coupling ring. This prevents
accidental loosening of the
connection and annoying
noise when the cable is
moved.
Output
The XLR output of the
MZA 900 P together with the back-electret condenser
microphone delivers the correct signal phase (an increase
in sound pressure in front of the microphone diaphragm
causes a positive voltage to appear at pin 2 and a negativ
voltage to appear at pin 3). The output is electronically
balanced and floating.
Use a balanced XLR cable to connect the XLR output to
the phantom powered microphone input of the
subsequent device. If necessary, you can do without the
cable and connect the MZA 900 P directly to the XLR
input socket of the device.
2
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Attaching the MZA 900 P to clothing
Using the belt clip, you can unobtrusively attach the
MZA 900 P to clothing (e.g. belt, waistband).
Switchable pre-attenuation
The gain can be reduced by
12 dB. This is recommended
when the subsequent micro-
phone input is overmodulated
or when the MZA 900 P’s
output is strongly biassed by
the subsequent device, e.g. due
to high sound pressure levels
from drums, brass instruments, etc.
Please note that when operating the MZA 900 P on 12V
phantom powering, its output is considerably biassed by
the power supply. If this is the case, and when high sound
pressure levels occur, the pre-attenuation should also be
switched on.
Switchable roll-off filter
The roll-off filter allows the MZA 900 P to be adapted to
Sennheiser HSP and clip-on microphones. With the roll-
off filter switched on (
), the low-frequency signal
portions (below 125 Hz) are attenuated, thus increasing
speech intelligibility. In addition, pop and wind noise is
effectively suppressed.
3
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Operation and over-modulation indication
The MZA 900 P features a two-
colour LED.
LED lights up in green:
The MZA 900 P is properly
powered and there is no over-
modulation (normal operation).
LED lights up in red:
A flashing red LED at high sound pressure levels indicates
over-modulation of the microphone or overloading of the
MZA 900 P’s output.
A constant red LED indicates a defective cable.
4
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Using the MZA 900 P as a cable tester
The MZA 900 P can also be used as a cable tester for XLR
microphone cables. For this, there is no need to connect a
microphone.
Connect one end of the cable to be tested to a mixing
console with activated phantom powering. Connect the
other end of the cable to the MZA 900 P.
LED lights up in green:
y
The cable is OK
LED lights up in red. Possible errors:
y
y
One signal wire is broken
One signal wire is short-circuited to the shielding
LED does not light up. Possible errors:
y
y
y
Both signal wires are broken
The shielding is interrupted
Both signal wires are short-circuited to the shielding
5
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Pin assignment
3-pin
special socket
Mikrofon
Mikrofon
3,5 mm
2
3
1
front view
MZA 900 P-4
MZA 900 P
3,5 mm
XLR- 3 M
XLR- 3 M
2
3
1
2
+
+
1
2
3
3
1
rear view
rear view
Kabel
XLR-3 F
XLR-3 M
1
2
2
1
3
3
symmetrisch
6
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Specifications
Frequency response
20–20,000 Hz (–1 dB)
Pre-attenuation, switchable 0/–12 dB
Roll-off filter, switchable
Max. output voltage at
125 Hz (–3 dB), 12 dB/oct
y
0 dB pre-attenuation
1.8 V (P48)
0.6 V (P12)
0.45 V (P12 – P48)
y
–12 dB pre-attenuation
Noise voltage at
the output
CCIR: 12 μV (0/–12 dB)
A: 3 μV (0/–12 dB)
Output impedance
100 Ω
Min. load impedance at
y
y
0 dB pre-attenuation
–12 dB pre-attenuation
5 kΩ (P12 – P48)
2 kΩ (P12 – P48)
Power supply
P12 – P48
10 – 52 V
2.6 – 2.8 mA
Connector
XLR-3 M
Input socket
MZA 900 P
MZA 900 P-4
3.5 mm jack socket,
lockable
3-pin special socket
Ø 19/22 mm, L 100 mm
60 g
Dimensions
Weight
Operating temperature range –20 to +60°C
Humidity range < 95 % r. h.
7
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Manufacturer declarations
Warranty
2 years
Approval
Sennheiser electronic GmbH & Co. KG declare that this device
is in compliance with the applicable CE standards and regula-
tions.
WEEE Declaration
Please dispose of this product at the end of its operational li-
fetime by bringing it to your local collection point or recycling
centre for such equipment.
8
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Sennheiser electronic GmbH & Co. KG
30900 Wedemark, Germany
Phone +49 (5130) 600 0
Fax +49 (5130) 600 300
Printed in Germany
Publ. 06/06
516535/A01
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