SR 3254
SR 3256
Instructions for use
4
SR 3254
SR 3256
Safety instructions
These instructions for use contain important safety
information.
Read these instructions.
Keep these instructions in a safe place. Always include these
instructions when passing the device on to third parties.
Heed all warnings.
Follow all instructions.
Operation
Use the device in dry rooms only. To reduce the risk of fire or
electric shock, do not expose the device to rain or moisture.
Objects filled with liquids, such as vases or coffee cups, must not
be placed on the device. Do not use the device near water or
liquids.
Never spill liquids of any kind onto the device. Should a spillage
occur, unplug the device and have it checked by a technician.
Never push objects of any kind through openings of this device
as they may touch dangerous voltage points or short-out parts
that could result in fire or electric shock.
Ensure sufficient ventilation. Do not block any ventilation
openings. Install in accordance with the manufacturer’s
instructions.
Do not install near any heat sources such as central heating
radiators, electric heaters, stoves, or other devices that produce
heat (e.g. amplifiers). Keep the device away from direct
sunlight and similar sources of heat.
The device is a Class 1 device. It must only be connected to
properly grounded power outlets.
This device is supplied with an IEC power cable complete with a
moulded mains plug. This is for your safety - do not tamper with
the mains. If the supplied cable does not fit your mains socket,
please consult a competent electrician for a replacement cable
2
that matches the power output sockets in your country, or to
replace the obsolete socket with one to current standards.
This device should be operated only from the type of power
source indicated on the marking label. lf you are not sure of the
type of power supply to your building, consult your dealer or
local power company.
Do not overload wall outlets and extension cords as this may
result in fire and electric shock.
Protect the power cord from being walked on or pinched,
particularly at plugs, convenience receptacles, and the point
where they exit from the device.
Only use attachments/accessories specified by Sennheiser.
Use only with the mountings specified by Sennheiser. When a
cart is used, use caution when moving the cart/device
combination to avoid injury from tip-over.
Unplug the device during lightning storms or when unused for
long periods of time.
Service
No user serviceable parts inside! Do not attempt to service this
device yourself as opening or removing covers may expose
dangerous voltage or other hazards. If devices are opened by
customers in breach of this instruction, the warranty becomes
null and void.
Refer all servicing to qualified service personnel. Servicing is
required if the device has been damaged in any way, such as
mains cable or plug damage, liquid has been spilled, objects
have fallen inside, the device has been exposed to rain or
moisture, does not operate properly or has been dropped.
Clean only with dry cloth.
3
Symbols on adhesive labels attached to the device
The adjoining adhesive label is attached to the devices back.
The symbols on this label have the following meaning:
This symbol is intended to alert the user to the presence of un-
insulated dangerous voltage within the product's enclosure
that may be of sufficient magnitude to constitute risk of fire or
electric shock.
This symbol is intended to alert the user to the risk of electric
shock if the unit cover or back is removed. There are no service-
able parts inside. Refer servicing to qualified personnel only.
This symbol is intended to alert the user to the presence of im-
portant operating and maintenance instructions in the litera-
ture accompanying this product.
Attention! High volume!
This is
a
professional transmission system.
Commercial use is subject to the safety-at-work
regulations. Sennheiser, as the manufacturer, is
therefore obliged to expressly point out possible
health risks arising from use.
This system is capable of producing sound pressure exceeding
85 dB(A). 85 dB(A) is the sound pressure corresponding to the
maximum permissible volume which is by law (in some
countries) allowed to affect your hearing for the duration of a
working day. It is used as a basis according to the specifications
of industrial medicine. Higher volumes or longer durations can
damage your hearing. At higher volumes, the duration must be
shortened in order to prevent damage. The following are sure
signs that you have been subjected to excessive noise for too
long a time:
y You can hear ringing or whistling sounds in your ears.
y You have the impression (even for a short time only) that
you can no longer hear high notes.
4
Intended use of the transmitter
Intended use includes
y having read these instructions especially the
chapter “Safety instructions”.
y using the transmitter within the operating conditi-
ons as described in these instructions.
Improper use
Improper use is when you use the transmitter other
than described in these instructions or when you use
the transmitter under operating conditions different
from those described in these instructions.
5
SR 3254/SR 3256 transmitters
With the wireless in-ear monitoring system, consisting of the
SR 3254 or SR 3256 stereo transmitter and the EK 3253
bodypack receiver, musicians, video and sound amateurs,
reporters/broadcasters, etc. can directly monitor the received
sound signals without troublesome cables or monitor speakers
being required. In addition, the system can also be used for any
application where talkback signals are to be transmitted.
The system has superb audio quality with an increased signal-
to-noise ratio and dynamic range due to the inclusion of
Sennheiser’s HDX noise reduction system.
The SR 3254 is a single stereo transmitter in a 19" 1 U housing.
4
SR 3254
SR 3256
The SR 3256 consists of two complete stereo transmitters in a
19" 1 U housing.
The stereo transmitters have the following features:
y Easy to use
y Stereo/mono selector switch
y Switching bandwidth of 36 MHZ per transmitter
y Transmission frequencies tunable in steps of 5 kHz
y HDX noise reduction system with more than 90 dB signal-to-
noise ratio
y LC display for frequency, RF output power and deviation
y Rugged 19" housing with built-in mains unit; supplied with
rack-mounting kit
y Suitable for multi-channel applications
y RF output power of up to 100 mW
6
The channel bank system
The SR 3254/SR 3256 transmitter is available in five UHF
frequency ranges:
Range A:
Range B:
Range C:
Range D:
Range E:
518 to 554 MHz
626 to 662 MHz
740 to 776 MHz
786 to 822 MHz
830 to 866 MHz
The transmitter has two channel banks with up to 16
switchable channels each. The channels of the channel bank “F“
(fixed bank) have been factory-preset to customer-specific
transmission frequencies. These frequencies cannot be
changed.
The channel bank “U” (user bank) allows you to freely select
and store frequencies.
Recommended receiver
y EK 3253
Delivery includes
y 1 SR 3254 transmitter or
1 SR 3256 twin transmitter
y 1 rack-mounting kit
y 1 mains cable
y 1 telescopic antenna (with the SR 3254)
or
2 telescopic antennas (with the SR 3256)
y Instructions for use
7
Overview of operating controls
³ Headphone output,
¸ Fuse holder and mains voltage
¼” (6.3 mm) jack socket
selection (230 or 115 V)
¹ 2-pin IEC mains connector
Ƹ Cable grip for mains cable
· Headphone volume control
» LCD bargraph for deviation of the left
channel (DEV L), with overmodulation
display (“PEAK”)
ƹ Programming interface,
15-pin sub-D socket
¿ LCD bargraph for deviation of the
right channel and “MONO” (DEV R), with
overmodulation display (“PEAK”)
ƺ Audio input, left (AF IN (L))
ƻ Audio input, right
(AF IN (R) + MONO)
´ LCD bargraph for RF output power (RF)
² Alphanumeric LC display
¶ SET button
Ƽ Type plate
ƽ Antenna output
º ̆ button (UP)
¾ ̄ button (DOWN)
µ POWER button
Note:
Connections and operating controls marked with a star (‚) in the above illustration
are those for the second transmitter of the SR 3256 twin transmitter.
8
Indications and displays
ባ ቤ ብ ቦ
ቭ
ቫ
ቪ
ቩ ቨ
ቢ Alphanumeric display
ባ “FREQUENCY MHZ” display
ቤ “CHANNEL” display
ብ LC dot CHANNEL
ቦ LC dot TUNE
ቧ LC dot MONO/STEREO
ቨ LC dot STEREO (transmitter is set to stereo operation)
ቩ LC dot MONO (transmitter is set to mono operation)
ቪ MUTE display (transmitter is muted)
ቫ 6-step bargraph for RF output power
ቭ 11-step deviation bargraph
(two separate bargraphs for the left and right channel)
Deviation display
The two bargraphs ቭ indicate the deviation of the audio signal
of the left and right channel. When the transmitter’s audio
input level is excessively high, “PEAK” lights up.
ቭ
Display of the RF output power
The bargraph ቫ indicates the RF output power. During normal
operation, an RF output power of 100 % is indicated.
9
Preparing the transmitter for use
Using the transmitter as a stand-alone unit
Mounting the transmitter feet
To ensure that the transmitter cannot slip on the surface on
which it is placed, four self-adhesive soft rubber feet are
supplied.
̈ Ensure that the base of the transmitter is clean and free from
grease before mounting the rubber feet.
̈ Fix the rubber feet to the base of the transmitter by peeling
of the safety paper and fitting them as shown in the diagram
on the left.
Attention!
Some furniture surfaces have been treated with varnish,
polish or synthetics which might cause stains when they
come into contact with other synthetics. Despite a thorough
testing of the synthetics used by us, we cannot rule out the
possibility of staining.
Connecting the telescopic antenna
When using the transmitter as a stand-alone unit, connect the
supplied telescopic antenna ƾ. The telescopic antenna can be
mounted quickly and easily and is suitable for all applications
where – good transmission conditions provided – a wireless
transmission system is to be used without a large amount of
installation work.
̈ Connect the telescopic antenna to the BNC socket ƽ at the
rear of the transmitter.
̈ Pull the end cap to extend the telescopic antenna.
Optimum transmission and reception conditions can be
obtained by using remote antennas (see “Mounting and
connecting remote antennas” on page 16).
10
Rack-mounting several transmitters
You can use the supplied rack mount “ears” to mount the
transmitter into a 19" rack (1 U). If you wish to mount the
antennas to the front of the rack, use the GA 3030-AM antenna
mount (see “Accessories” on page 29).
When rack-mounting the device, please consider that, during
operation, the ambient temperature within the rack may
significantly rise above room temperature. However, the
ambient temperature within the rack must not exceed the
temperature limit specified in the specifications.
When rack-mounting the device, take good care not to affect
the ventilation required for safe operation or provide additional
ventilation.
When rack-mounting the device, ensure that its housing is not
mechanically loaded and that it is adequately supported at the
rear, e.g. for transport.
When connecting the device to the power supply, observe the
information indicated on the type plate. Avoid circuit
overloading. If necessary, provide overcurrent protection.
Ensure a reliable mains ground connection of the device by
taking appropriate measures.
When rack-mounting the device, please note that intrinsically
harmless leakage currents of the individual devices may
accumulate, thereby exceeding the allowable limit value. As a
remedy, ground the rack via an additional ground connection.
11
Setting up the transmitters
The SR 3254 and SR 3256 transmitters heat up during
operation.
y Ventilation in fixed installations
Ensure sufficient ventilation, especially when the transmitters
are mounted into a desk or chassis. Provide for a duct of
sufficient size to ensure a free air flow between the trans-
mitters.
y Sufficient ventilation in a rack
When operating several transmitters in a rack, ensure
sufficient ventilation or cooling. We recommend not stacking
more than two transmitter directly one above the other, and
then providing for a duct of sufficient size to ensure a free air
flow between the transmitters.
Rack-mounting the transmitter without mounting the
antennas to the front of the rack
̈ Hook the two rack mount “ears” ƿ to the rear of the
transmitter.
̈ Secure the rack mount “ears” to the left and right of the
transmitter using four recessed head screws respectively.
̈ Slide the transmitter into the 19" rack.
̈ Secure the rack mount “ears” ƿ to the rack.
12
Rack-mounting the transmitter and mounting the antennas
to the front of the rack
̈ Mount the antenna holders
to the handles of the
transmitter as shown in the diagram on the left.
̈ Hook the two rack mount “ears” ƿ to the rear of the
transmitter.
̈ Pull the cables of the antenna holders
through the holes
in the rack mount “ears”.
̈ Secure the rack mount “ears” to the left and right of the
transmitter using four recessed head screws respectively.
̈ Connect the cables of the antenna holders to the antenna
sockets ƽ at the rear of the transmitter.
̈ Slide the transmitter into the 19" rack.
̈ Connect the telescopic antennas to the BNC sockets of the
antenna holders
.
13
Connecting the transmitter to the mains
The transmitter can be connected to 230 V or 115 V AC. Before
you plug the mains connector into the wall socket, please first
check that the transmitter is set to the correct mains voltage!
The set voltage is shown at the top of the fuse holder ¸.
Selecting the mains voltage
Electric shock hazard!
WARNING!
In case of improper handling, you may come
into contact with electrically conducting parts
and receive an electric shock when removing
the fuse holder.
̈ Before removing the fuse holder, pull out the
mains connector from the wall socket.
To select the mains voltage, proceed as follows:
̈ Disconnect the transmitter completely from the mains by
pulling out the mains connector from the wall socket.
̈ Use a screwdriver to loosen the fuse holder ¸.
̈ Remove the fuse holder with the inserted fuse.
̈ Turn the fuse holder by 180° and reinsert it.
The set voltage is shown at the top of the fuse holder.
14
Connecting the mains cable
̈ Insert the supplied mains cable into the socket on the
transmitter and pass the cable through the cable grip.
Note
A cable grip is particularly important when the transmitter is
permanently rack-mounted. Inside the rack there are often a
large number of cables – a cable grip prevents the cables
from pulling each other out.
Using transmitters in a multi-channel system
You can combine several transmitters to make a multi-channel
system. To do so, you require an antenna combiner (e.g. the
AC 3000, see “Accessories” on page 29) which allows you to
combine the signals of up to four twin receivers onto a single
antenna (see diagram below). For detailed information on
setting up a multi-channel system and on connecting the
transmitters, please refer to the operating manual of the
antenna combiner.
ANT
RF OUTPUT
8:1
15
Mounting and connecting remote antennas
Use a remote antenna when the transmitter position is not the
best antenna position for optimum transmission. You can
choose between two antennas (see “Accessories” on page 29):
y A 2003 UHF passive directional antenna
y A 1031 passive omni-directional antenna
A 2003
Use a low-attenuation 50-Ω cable to connect the antenna to
the transmitter. Ready-made antenna cables from Sennheiser
are available as accessories with length of 5 m and 10 m. If
possible, use a short antenna cable and as little connections as
possible, since long cables and many connectors lead to an
attenuation of the antenna signal. Position antennas in the
same room in which the transmission takes place! Maintain a
minimum distance of 1 m from metal objects (including
reinforced concrete walls)!
A 1031
Connecting the mixing console
Connect the mixing console to the XLR-3 sockets AF IN (L) ƺ
and AF IN (R) + MONO ƻ.
Note
Any unit that is only suitable for mono operation must be
connected to the XLR-3 socket AF IN (R) + MONO ƻ. In this
case, set the transmitter to mono operation (see “Switching
between mono and stereo operation” on page 22).
16
Using the transmitter
Switching the transmitter on/off
̈ Press the POWER button ¾ to switch the transmitter on or
off.
After switch-on, the LC display is backlit and the last
transmission frequency set is displayed.
Until the PLL has locked on the desired transmission frequency,
the transmitter is muted. “MUTE” appears on the display and
the LCD bargraph for RF output power (RF) ´ indicates 0 %.
Note
The POWER button ¾ works in the secondary circuit of the
integrated mains transformer, and thus only switches the
low voltage side. For larger installations with several
transmitters, a complete mains disconnection can best be
achieved by a central ON/OFF switch.
17
Connecting the headphones/monitoring the audio signal
Attention! High volume!
Even short exposure to high volume levels can damage your
hearing! Set the volume for the connected headphones to the
minimum before putting the headphones on. Do not listen at
higher volume levels than with loudspeakers.
̈ Connect headphones with a ¼“ (6.35 mm) stereo jack plug
to the headphone output ³ to monitor the stereo audio
signal present at the audio inputs ƺ AF IN (L) and
ƻ AF IN (R) + MONO.
Note
Even during mono operation, the left and right channel are
reproduced separately via the headphones.
̈ First, set the volume control ᕢ to the lowest volume by
turning it to the left as far as possible. Then gradually turn up
the volume.
18
The operating menu of the transmitter
Via the operating menu, you can quickly and easily change the following settings:
Menu
Function of the menu
TUNE
Setting a transmission frequency for the channel bank “U”
(user bank)
CHANNEL
Selecting a channel from the channel bank “U” or “F”
Switching between mono and stereo operation
MONO/STEREO
The buttons
In the operating menu, all settings can be made using the ̆ , ̄ and SET buttons:
Buttons
Mode
Function of the button
̆/̄
Display mode Selects a menu.
Setting mode y Briefly pressing the button:
The display jumps either forwards or backwards to the
next setting.
y Holding down the button (“TUNE” and ”CHANNEL”
menu):
The display cycles continuously (“fast search”
function). The “fast search” function allows you to get
fast and easily to your desired setting.
SET
Display mode Changes to the setting mode of the selected menu.
Setting mode y Stores the setting and returns to the display mode.
y In the “TUNE” menu:
Confirms the selection of the channel for which you
want to set the frequency.
Canceling an entry
When in the setting mode of a menu, you can cancel your entry
at any time by pressing the ̆ and ̄ buttons simultaneously.
The cancellation is briefly confirmed on the display with “ESc.”.
The previous setting is kept and the transmitter returns to the
display mode.
19
Overview of the operating menu
Display mode
Setting mode
Press SET
for 1 sec.
SET
: U 1... U 16, F 1... F16
SET: Selects the channel
Current channel
SET
: Transmission
frequency in steps of 5 kHz
Current frequency
SET
SET
Current channel or current
frequency
Changing the channel
: U 1... U 16, F 1... F16
SET
SET
Switching between mono
and stereo operation
Current setting
: Mono, Stereo
SET
20
TUNE Selecting the frequencies to be stored in the
channel bank “U”
Via the “TUNE” menu, you can freely select the frequencies to
be stored in the channel bank “U” (user bank).
̈ Press the ̆/̄ buttons to select the “TUNE” menu. The LC
ባ
ቦ
dot “TUNE” ቦ lights up.
̈ Press the SET button to get into the setting mode of the
“TUNE” menu.
The LC dot “TUNE” ቦ and the “FREQUENCY MHZ” display ባ
start flashing.
Note
When pressing the SET button for one second, you can use
the ̆/̄ buttons to select a different channel for which you
can then change the frequency.
When you have selected the channel bank “F” and then select
the “TUNE” menu, the transmitter automatically switches to
channel 01 of the channel bank “U” and “U.01” appears on the
display. Otherwise, the current channel of the channel bank “U”
is displayed.
̈ Press the ̆/̄ buttons to select the desired transmission
frequency. Transmission frequencies are tunable in 5-kHz
steps within a switching bandwidth of 36 MHz max.
̈ Press the SET button to store your selection. “Sto.” briefly
appears on the display. While the transmitter changes to the
new frequency, it is muted.
21
CHANNEL Selecting a channel from the channel bank “U”
or “F”
̈ Press the ̆/̄ buttons to select the “CHANNEL” menu.
The LC dot “CHANNEL” ብ and the “CHANNEL” display ቤ light
ቤ ብ
up.
̈ Press the SET button to get into the setting mode.
̈ Press the ̆/̄ buttons to select the desired channel.
1 Sek.
̈ Press the SET button to store your selection. “Sto.” briefly
appears on the display.
MONO/STEREO Switching between mono and stereo operation
̈ Press the ̆/̄ buttons to select the “MONO/STEREO” menu.
The LC dot “MONO/STEREO” ቧ lights up.
̈ Press the SET button to get into the setting mode.
̈ Press the ̆/̄ buttons to select the desired operating mode.
̈ Press the SET button to store your selection. “Sto.” briefly
appears on the display.
22
Care and maintenance
Cleaning the transmitter
Water can damage the electronics of
the transmitter!
CAUTION!
Water entering the housing of the transmitter
can cause a short-circuit and damage the
electronics.
̈ Only use a slightly damp cloth to clean the
transmitter.
̈ Before cleaning, disconnect the transmitter from the mains.
̈ If necessary, you can clean the transmitter with a slightly
damp cloth. Do not use any cleansing agents or solvents.
Replacing the fuse
Electric shock hazard!
WARNING!
In case of improper handling, you may come into
contact with electrically conducting parts and
receive an electric shock when removing the
fuse holder.
̈ Before removing the fuse holder, pull out the
mains connector from the wall socket.
̈ Disconnect the transmitter completely from the mains by
pulling out the mains connector from the wall socket.
̈ Use a screwdriver to loosen the fuse holder ¸.
̈ Remove the fuse holder with the inserted fuse.
̈ Replace the fuse by a new fuse with the same rating.
̈ Reinsert the fuse holder. Make sure to insert the fuse holder
the correct way round.
The set voltage is shown at the top of the fuse holder.
̈ Reconnect the transmitter to the mains and and switch it on
again.
23
If the replacement fuse also blows, please contact your local
Sennheiser agent or send the transmitter, with a precise
description of the trouble, to a Sennheiser service partner in
your area. You can find the address of your nearest service
partner in the enclosed service card or on the Internet at
service_partner”.
24
If problems occur ...
Error checklist
Problem
Possible cause
Possible solution
No operation indication
No mains connection
Check the connections of
the mains connector
Fuse is defective
Replace the fuse
No RF signal
Transmitter and receiver
are not on the same
channel
Set transmitter and
receiver to the same
channel
Transmitter is out of
range
Change the antenna
position
RF signal available,
no audio signal
Transmitter is set to
Deactivate the pilot tone
evaluation on the receiver
mono operation and the
pilot tone evaluation of
the receiver is activated
Receiver’s squelch
Reduce the squelch
threshold is adjusted too threshold on the receiver
high
Audio signal has a high
level of background
noise or is distorted
Transmitter sensitivity is See “Connecting the
adjusted too low or too
high
mixing console” on
page 16
If problems occur that are not listed in the above table or if the problems cannot be
solved with the proposed solutions, please contact your local Sennheiser agent for
assistance.
25
Additional information
HDX noise reduction
RF link
Inherent
noise of
the RF link
Transmitter
Receiver
Progress you can hear:
The product family is equipped with HDX, the Sennheiser noise
reduction system that reduces RF interference. It increases the
signal-to-noise ratio in wireless audio transmission to more
than 90 dB.
HDX is a wideband compander system which compresses the
audio signal in the transmitter in a 2:1 ratio (related to dB) to
lift it above the inherent noise floor of the RF link. In the receiver
the signal is expanded in an identical and opposite way in a 1:2
ratio to restore the original signal, at the same time reducing
the RF noise to below the noise floor of the receiver.
HDX has been specially developed for high quality radio
microphone systems.
Note:
Only transmitters and receivers that are equipped with HDX
can work correctly with each other. If non HDX equipment
was mixed with HDX, the dynamic range would be
drastically reduced and the transmission would sound blunt
and flat.
26
Specifications
RF characteristics
Frequency ranges
518–554, 626–662, 740–776, 786–822,
830–866 MHz
Transmission frequencies
1 channel bank with up to 16 factory-preset
channels
1 channel bank with up to 16 freely selectable
channels (frequencies tunable in steps of
5 kHz)
Switching bandwidth
Frequency stability
Antenna output
36 MHz
±10 ppm (-10°C to +55°C)
BNC socket, 50 Ω
max. 100 mW
RF output power
AF characteristics
Modulation
FM stereo working on the pilot tone principle
Sennheiser HDX
Noise reduction system
Nominal/peak deviation
±24 kHz / ±48 kHz
MPX pilot tone
19 kHz / ±5 kHz
(frequency/deviation)
AF frequency response
Headphone output
40–15,000 Hz
¼“ (6.35 mm) stereo jack socket,
≥ 200 mW/32 Ω
Load impedance of
headphone output
≥ 16 Ω
AF input
2 x XLR-3, electronically balanced
AF input voltage (at nom. deviation) +4 dBu at 1 kHz, internally adjustable
Signal-to-noise ratio
> 90 dB(A)
rms
(refers to overall link with EK 3253)
THD
< 0.9 %
(at 1 kHz and nominal deviation)
Note:
The above data also apply to the second transmitter in the SR 3256.
27
Overall unit
Power supply
115/230 V AC +10% / –15%
max. 13 W
Power consumption SR 3254
Power consumption SR 3256
max. 23 W
Dimensions
436 x 228 x 43 mm (19", 1 U)
(without rack mount “ears”)
Weight SR 3254
Weight SR 3256
Type approval
approx. 3,300 g
approx. 4,000 g
USA:
FCC-Part 74.861
FCC ID: DMOSREK3K
Canada: RSS-123
IC: 2099A-SREK3K
EU:
ETSI EN 300 454-1/-2
CE 0682!
Connector assignment
SR 3254/SR 3256
¼“ (6.35 mm) stereo jack plug
for headphone output
XLR-3 connector (male)
2
1
+
3
28
Accessories
AC 3000-EU Active Antenna combiner Cat. no. 009424
AC 3000-UK Active Antenna combiner Cat. no. 009410
AC 3000-US Active Antenna combiner Cat. no. 094409
A 1031-U Passive omni-directional antenna Cat. no. 004645
GA 3030-AM Antenna mount Cat. no. 004368
A 2003 UHF Passive directional antenna Cat. no. 003658
GZL 1019 A5 BNC-BNC coaxial cable, length 5 m Cat. no. 002325
GZL 1019 A10 BNC-BNC coaxial cable, length 10 m Cat. no. 002326
GZV 1019A BNC coupler Cat. no. 002368
HD 25 Monitoring headphone Cat. no. 002976
EK 3253 A Monitoring receiver Cat. no. 500522
EK 3253 B Monitoring receiver Cat. no. 500523
EK 3253 C Monitoring receiver Cat. no. 500524
EK 3253 D Monitoring receiver Cat. no. 500525
EK 3253 E Monitoring receiver Cat. no. 500526
29
Manufacturer declarations
Warranty regulations
The guarantee period for this Sennheiser product is 24 months from the date of purchase. Excluded are
accessory items, rechargeable or disposable batteries that are delivered with the product; due to their
characteristics these products have a shorter service life that is principally dependent on the individual
frequency of use.
The guarantee period starts from the date of original purchase. For this reason, we recommend that the
sales receipt be retained as proof of purchase. Without this proof (which is checked by the responsible
Sennheiser service partner) you will not be reimbursed for any repairs that are carried out.
Depending on our choice, guarantee service comprises, free of charge, the removal of material and
manufacturing defects through repair or replacement of either individual parts or the entire device.
Inappropriate usage (e.g. operating faults, mechanical damages, incorrect operating voltage), wear and
tear, force majeure and defects which were known at the time of purchase are excluded from guarantee
claims. The guarantee is void if the product is manipulated by non-authorised persons or repair stations.
In the case of a claim under the terms of this guarantee, send the device, including accessories and sales
receipt, to the responsible service partner. To minimise the risk of transport damage, we recommend that
the original packaging is used. Your legal rights against the seller, resulting from the contract of sale, are
not affected by this guarantee.
The guarantee can be claimed in all countries outside the U.S. provided that no national law limits our terms
of guarantee.
CE Declaration of Conformity
This equipment is in compliance with the essential requirements and other relevant provisions of Directives
1999/5/EC, 89/336/EC or 73/23/EC. The declaration is available on the internet site at
Before putting the device into operation, please observe the respective country-specific regulations!
WEEE Declaration
Your Sennheiser product was developed and manufactured with highquality materials and
components which can be recycled and/or reused. This symbol indicates that electrical and
electronic equipment must be disposed of separately from normal waste at the end of its
operational lifetime.
Please dispose of this product by bringing it to your local collection point or recycling centre for
such equipment. This will help to protect the environment in which we all live.
30
Sennheiser electronic GmbH & Co. KG
30900 Wedemark, Germany
Phone +49 (5130) 600 0
Fax +49 (5130) 600 300
Printed in Germany
Publ. 09/06
513631 / A02
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