Sennheiser RS 175 User manual

RS 175 | 1
RS 175
Digital Wireless Headphone System
Model: RS 175, TR 175, HDR 175
Instruction Manual

Important safety instructions
2 | RS 175
Important safety instructions
bRead this instruction manual carefully and completely before
using the product.
bAlways include this instruction manual when passing the product
on to third parties.
bDo not use an obviously defective product.
bOnly use the product in environments where wireless 2.4 GHz
transmission is permitted.
Preventing damage to health and accidents
bProtect your hearing from high volume levels. Permanent
hearing damage may occur when headphones are used at
high volume levels for long periods of time. Headphones
of the Sennheiser brand sound exceptionally even good at low
and medium volume levels.
bDo not use the product in an environment that requires your spe-
cial attention (e.g. when performing skilled jobs).
bThe product generates stronger permanent magnetic
fields that could cause interference with cardiac pace-
makers, implanted defibrillators (ICDs) and other
implants. Always maintain a distance of at least 3.94"/10 cm
between the product component containing the magnet and the
cardiac pacemaker, implanted defibrillator, or other implant.
bDo not use the product near water. Do not expose the product to
rain or moisture to reduce the risk of fire or electric shock.
bKeep the product, accessories and packaging parts out of reach
of children and pets to prevent accidents. Swallowing and chok-
ing hazard.
bOnly use the power supply units supplied by Sonova Consumer
Hearing.
Preventing damage to the product and malfunctions
bAlways keep the product dry and do not expose it to extreme tem-
peratures to avoid corrosion or deformation. The normal operat-
ing temperature is from 0 to 40 °C/32 to 104 °F.
bUse the product with care and store it in a clean, dust-free envi-
ronment.
bDo not use the product if it is obviously damaged, if it has been
dropped, or if liquids or objects have entered the product. In this
case, contact a qualified specialist workshop or your Sonova Con-
sumer Hearing partner to have the product checked.
bSwitch off the product after use to conserve battery power. When
not using the product for extended periods of time, remove the
rechargeable batteries.
bUnplug the power supply unit from the wall socket
– to completely disconnect the product from the power source,
– during lightning storms or
– when not using the product for long periods of time.

Important safety instructions
RS 175 | 3
bAlways ensure that the power supply unit is
– in a safe operating condition and easily accessible,
– properly plugged into the wall socket,
– only operated within the permissible temperature range,
– not exposed to direct sunlight for longer periods of time in order
to prevent heat accumulation.
bDo not place your headphones on a glass dummy head, chair arm-
rest or similar objects for long periods as this can widen the head-
band and reduce the contact pressure of the headphones.
bVarnish or furniture polish may degrade the feet of the transmit-
ter, which could stain your furniture. You should therefore place
the transmitter on a non-slip pad to avoid potential staining of fur-
niture.
bDo not operate the product near heat sources.
bClean the product only with a soft, dry cloth.
bUse only attachments/accessories/spare parts supplied or rec-
ommended by Sonova Consumer Hearing.
Intended use/Liability
This wireless headphone system is suitable for use with hi-fi sys-
tems, TV sets, and home cinema systems and supports both analog
and digital signals simultaneously.
This product is intended for private domestic use only. It is not suit-
able for commercial use. This product is also not intended to be used
with portable audio devices.
It is considered improper use when this product is used for any appli-
cation not named in this instruction manual and the associated prod-
uct documentation.
Sonova Consumer Hearing GmbH does not accept liability for dam-
age arising from misuse or improper use of the product and its
attachments/accessories.
Before putting the product into operation, please observe the
respective country-specific regulations.

Important safety instructions
4 | RS 175
Safety instructions for rechargeable batteries
WARNING
If abused or misused, rechargeable batteries may leak. In extreme
cases, they may even present a risk of:
•explosion,
• heat and fire development
• smoke and/or gas development
• damage to health and/or the envi-
ronment
Keep away from chil-
dren.
Do not expose to moisture.
Do not mutilate or dis-
mantle.
Observe correct polarity.
Pack/store charged
rechargeable batter-
ies so that the termi-
nals cannot contact
each other – danger of
shorting out/fire haz-
ard.
Switch rechargeable battery-
powered products off after
use.
Only charge recharge-
able batteries at
ambient tempera-
tures between 10 °C
and 40 °C/50 °F and
104 °F.
Do not heat above 70 °C/
158 °F, e.g. do not expose to
sunlight or throw into a fire.
When not using
rechargeable batter-
ies for extended peri-
ods of time, charge
them regularly
(about every 3
months).
When not using the product
for extended periods of time,
remove the rechargeable
batteries.
Only use rechargeable
batteries and char-
gers supplied and/or
recommended by
Sonova Consumer
Hearing.
Do not continue using defec-
tive rechargeable batteries
and dispose of them immedi-
ately.
Immediately remove
rechargeable batter-
ies from an obviously
defective product.
Dispose of defective prod-
ucts with built-in recharge-
able batteries at special
collection points or return
them to your specialist
dealer to facilitate recycling.
Do not charge stan-
dard batteries.
Do not mix standard and
rechargeable batteries in the
battery compartments.
LR03
HR03

The RS 175 digital wireless headphone system
RS 175 | 5
The RS 175 digital wireless
headphone system
The RS 175 wireless headphone system offers compelling features
that let you enjoy music and movies even more intensely. With the
dynamic bass boost and the two surround modes of the RS 175, you
can fully exploit the sound potential of your home entertainment sys-
tem: The dynamic bass boost enhances the bass response, while the
two surround sound modes create a more spacious and vibrant ste-
reo sound in the headphones.
In addition, the RS 175’s innovative digital wireless technology pro-
vides crystal-clear, high-fidelity audio as you move from room to
room. The headphone system is simple to install and easy to use. The
main operating controls are located right on the headphones, so
there's nothing to distract you from an exciting home entertainment
experience. The ergonomic design of the headphones ensures excel-
lent wearing comfort for hours on end.
The Sennheiser RS 175: Home entertainment is now even more
entertaining!
Features
• Closed, circumaural headphones with excellent digital wireless
audio transmission
• Exceptional digital audio clarity and transmission range of up to
100 m/328 ft (line of sight)
• Adjustable dynamic bass boost and two surround sound modes
for individual sound customization
• Supports analog and digital audio inputs and allows toggling
between the inputs
• Intelligently designed controls for maximum ease of use
• Multi-purpose transmitter – also functions as “easy-charge”
cradle and docking station
• Multi-receiver transmission – transmitter supports up to two
pairs of headphones simultaneously
• Ergonomic design for enhanced wearing comfort
• 2-year warranty
Digital
Analog

Package contents
6 | RS 175
Package contents
Overview of accessories
A list of accessories can be found on the RS 175 product page at
www.sennheiser-hearing.com. Contact your local Sonova Consumer
Hearing partner: www.sennheiser-hearing.com/service-support).
Headphones
Model: HDR 175
Transmitter
Model: TR 175
Power supply unit with country adapters
(EU, UK, US, AU)
Model: NT9-3AW
Low self-discharge NiMH rechargeable batteries,
AAA size
Optical digital cable, 1.5 m
Stereo audio cable with 3.5 mm jack plugs, 2 m
Quick guide
Safety guide
SURR
LOHI
BASS
US
EU
UK AU
Safety Guide
Quick Guide
Safety Guide
Safety Guide

Product overview
RS 175 | 7
Product overview
Overview of the HDR 175 headphones
1
3
2
4
0
9
7
8
6
5
1Headband
2Charging contacts
3Ear pads
4Ear cups/Battery com-
partments
5SURR button for virtual
surround sound
6Volume +button
7Volume –button
8BASS button
9Power HDR button
0HDR status LED

Product overview
8 | RS 175
Overview of the TR 175 transmitter
SURR
LOHI
BASS
1
2
4
9
7
5
6
8
0
3
1TR status LED
2BASS button (with LED)
3Surround sound LEDs,
low LO and high HI,
indicate the selected sur-
round sound mode
4SURR button
for virtual surround sound
5Charge status LED
6Charging contacts
7Digital optical audio input
DIGITAL OPTICAL IN
8Audio input switch
AUDIO INPUT SELECTION
9Analog audio input
ANALOG 3.5 mm IN
(3.5 mm jack socket)
0DC 9V 0.3A connection
socket for the power supply
unit

Product overview
RS 175 | 9
Overview of the displays
The LEDs on the headphones and on the transmitter indicate the cur-
rent operating state. If you are not using the headphones, the LEDs
automatically dim after approx. 30 seconds to not disturb you.
Overview of the LED on the headphones
HDR status LED Meaning
The headphones are switched off.
The headphones and the transmitter are
connected.
The headphones and the transmitter are
connected and the rechargeable
batteries are almost empty.
The headphones are not connected or
cannot connect to the transmitter.
The headphones are not connected or
cannot connect to the transmitter and
the rechargeable batteries are almost
empty.
1s1s
1s1s

Product overview
10 | RS 175
Overview of the LEDs on the transmitter
When you remove the headphones from the transmitter’s headphone
holder, the Charge status LED on the transmitter indicates the
approximate operating time of the headphones:
SURR
LOHI
BASS
1
4
2
3
1Charge status LED Meaning
The transmitter is not charging.
The rechargeable batteries are being
charged.
The rechargeable batteries are fully
charged.
A charging error/battery error has been
detected.
Charge status LED Operating time Battery capacity
up to 4 hours 0–25 %
approx. 4 to 9 hours 25–50 %
approx. 9 to 14 hours 50–75 %
approx. 14 to 18 hours 75–100 %
2Surround sound LED Meaning
The virtual surround sound is
deactivated.
LO: The surround sound mode “low” is
activated.
HI: The surround sound mode “high” is
activated.

Putting the RS 175 into operation
RS 175 | 11
Putting the RS 175 into operation
Setting up the transmitter
bPlace the transmitter near your audio source.
bPlace the transmitter at least 20"/50 cm away from other wireless
devices in the room to avoid interference.
bDo not place the transmitter close to metal objects such as shelf
bars, reinforced concrete walls, etc. as this can decrease the
transmitter's range.
3
BASS LED Meaning
The dynamic bass boost is deactivated.
The dynamic bass boost is activated.
4
TR status LED Meaning
The transmitter is connected to the
power supply system.
The transmitter is in standby mode.
The transmitter and the headphones are
connected.
The transmitter has detected an
incompatible digital audio signal (see
page 27).
1 s
1.5 s1.5 s
SURR
LO HI
BASS

Putting the RS 175 into operation
12 | RS 175
Connecting the transmitter to audio sources
You can simultaneously connect two audio sources (e.g. a TV and a
stereo hi-fi system) to the transmitter. The transmitter features a
digital as well as an analog audio input. If you connect two audio
sources, you can toggle between them using the AUDIO INPUT
SELECTION switch (see page 21).
bSwitch your audio source off before connecting the transmitter.
bCheck the connection possibilities of your audio source (audio
output, usually marked “OUT”).
bSelect the corresponding connection cable and, if necessary, a
suitable adapter.
bDepending on the connection possibility selected, go to the
respective chapter and follow the instructions on how to connect
the transmitter to an audio source.
You can also refer to the video guides on how to connect your
digital wireless headphone system to a TV: www.sennheiser-
hearing.com/how-to-videos.
Connection possibilities of
the audio source Connection cable Page
Optical (digital) Optical digital cable 13
3.5 mm or 6.3 mm/¼"
jack socket (analog)
Stereo audio cable;
in case of a 6.3 mm/¼" jack
socket: with adapter 3.5 mm
jack socket to 6.3 mm/¼"
jack plug (to be ordered
separately)
14
RCA sockets (analog)
Stereo audio cable with
adapter 3.5 mm jack socket
to 2 RCA connectors
(to be ordered separately)
15
Accessories and adapters are available from your Sonova Con-
sumer Hearing partner.
A
B
C

Putting the RS 175 into operation
RS 175 | 13
Connection possibility A: optical (digital)
To achieve the best possible audio transmission, connect the trans-
mitter to your home cinema or hi-fi system using the supplied optical
digital cable.
Your wireless headphone system is able to decode digital audio sig-
nals from a device connected to the DIGITAL OPTICAL IN input. Note
that your RS 175 only supports digital PCM signals. Information on
how to set the audio format of the connected audio source to PCM
can be found in the Sound menu or in the instruction manual of your
device.
* The appearance of the Sound menu can vary depending on the
device you are using.
bSwitch your audio source off before connecting the transmitter.
bPull off the clear protective caps from both plugs before connect-
ing the cable.
bConnect one end of the optical digital cable to the DIGITAL OPTI-
CAL IN input of the transmitter and the other end to the optical
output of your audio source.
A
Digital
Digital sound output
PCM
Bitstream
Sound menu*
O
PT
I
CA
L
Digital
OFF

Putting the RS 175 into operation
14 | RS 175
Connection possibility B: 3.5 mm or 6.3 mm/¼" jack socket (ana-
log)
Some TV models mute the loudspeakers when you connect the
transmitter to the headphone socket. Check the menu of your TV to
see if the muting function can be deactivated. Alternatively, connect
the TV and the transmitter using a different connection possibility (A
or C).
bSwitch your audio source off before connecting the transmitter.
bIf necessary, plug the adapter 6.3 mm/¼" jack plug onto the
stereo audio cable.
bConnect the stereo audio cable to the 3.5 mm jack socket of the
transmitter and to the headphone socket of your audio source.
* optional accessory
B
Adjust the volume of the headphone socket on your audio
source to at least a medium level.
P
HONES
Analog
*
P
HO
N
ES
VOLUME

Putting the RS 175 into operation
RS 175 | 15
Connection possibility C: RCA sockets (analog)
bSwitch your audio source off before connecting the transmitter.
bPlug the RCA adapter onto the stereo audio cable.
bConnect the stereo audio cable to the 3.5 mm jack socket of the
transmitter.
bConnect the RCA plugs to the RCA outputs of your audio source
(usually marked “AUDIO OUT”). Connect the red plug to the red
RCA socket and the white plug to the white or black RCA socket.
* optional accessory
C
Analog
*
OFF
R
L
A
U
D
I
O
O
UT

Putting the RS 175 into operation
16 | RS 175
Connecting the transmitter to the power supply
system
1Select a suitable country adapter and slide it onto the power sup-
ply unit until it clicks audibly into place.
2Connect the connector of the power supply unit to the connection
socket of the transmitter.
3Plug the power supply unit into the wall socket.
The TR status LED on the transmitter lights up briefly. The
transmitter is in standby mode.
STANDBY
2
3
1
US
EU
UK
AU

Putting the RS 175 into operation
RS 175 | 17
Inserting or replacing the rechargeable batteries
1Turn the two ear pads counterclockwise until you overcome a
slight resistance.
2Lift the ear pads off the ear cups to reveal the battery compart-
ments.
3Insert the rechargeable batteries into the battery compartments.
To replace the batteries, pull the batteries out of the compart-
ments and insert the new ones. Observe correct polarity when
inserting the rechargeable batteries. Dispose of old rechargeable
batteries as special waste or return them to your specialist dealer.
4Place the two ear pads back on the ear cups. Observe the L(left)
and R(right) markings on the rear of the ear pads.
5Turn the two ear pads clockwise until they lock into place.
You can also power the headphones using standard batteries
(AAA size, 1.5 V). Note, however, that standard batteries are not
rechargeable. Therefore, if you are using non-rechargeable
batteries, do not place the headphones on the transmitter's
headphone holder to charge them.
12
345
Click

Putting the RS 175 into operation
18 | RS 175
Charging the rechargeable batteries
A complete charging cycle takes about 8.5 hours. However, before
using the headphones for the first time, charge the rechargeable bat-
teries for at least 16 hours without interruption to optimize the per-
formance of the batteries.
When the rechargeable batteries are almost empty, the HDR status
LED lights up red and you hear beeps in the headphones. The head-
phones switch off after a few minutes.
bPlace the headphones on the transmitter’s headphone holder. You
may place the headphones on either side provided that the
charging contacts of the headphones and the transmitter con-
nect.
The headphones automatically switch off and the Charge status
LED on the transmitter lights up red. When the rechargeable
batteries are fully charged, the Charge status LED lights up
green.
CAUTION Danger of damage to the headphones!
If you insert non-rechargeable batteries into the battery
compartments, the batteries may leak during charging
and can damage your headphones.
bDo not place the headphones on the transmitter's
headphone holder if you are using non-rechargeable
batteries.
8.5h
When not in use, place the headphones on the transmitter’s
headphone holder to ensure that the rechargeable batteries
are fully charged when needed. The intelligent battery
charging technology prevents overcharging.
When you remove the headphones from the transmitter’s
headphone holder, the Charge status LED on the transmitter
indicates the approximate operating time of the headphones
(see page 10).
SURR
LO HI
BASS
100%

Putting the RS 175 into operation
RS 175 | 19
Adjusting the headband
For good sound quality and best possible wearing comfort, the head-
band has to be adjusted to properly fit your head. The headphones
feature an adjustable headband with a snap-in locking mechanism
for easy adjustment.
bWear the headphones so that the headband runs over the top of
your head. Observe the L(left) and R(right) markings on the outer
headband when putting the headphones on.
bAdjust the length of the headband so that
– your ears are comfortably covered by the ear pads,
– you feel even, gentle pressure around your ears,
– a snug fit of the headband on the head is ensured.
R
R

Using the RS 175 wireless headphone system
20 | RS 175
Using the RS 175 wireless headphone
system
Switching the wireless headphone system on
1Switch your audio source on.
If the transmitter is connected to the headphone socket (see page
13) of your audio source, adjust the volume of the headphone
socket on your audio source (e.g. TV) to at least a medium level.
2Slide the AUDIO INPUT SELECTION switch on the transmitter up
or down to select your audio source (see page 21).
The transmitter is in standby mode and the TR status LED on
the transmitter lights up green.
3Press the Power HDR button on the headphones for approx.
2 seconds to switch the headphones on.
The transmitter recognizes the paired headphones and automat-
ically transmits a signal. The TR status LED on the transmitter
and the HDR status LED on the headphones light up green.
WARNING
Danger of hearing damage due to high volumes!
Listening at high volume levels can lead to permanent hearing
defects.
bBefore putting the headphones on and before toggling
between your audio inputs, adjust the volume on the head-
phones to a low level. Toggling between the audio inputs
may cause enormous volume jumps that can damage your
hearing.
bDo not expose yourself to high volume levels for extended
periods of time.
VOLUME
If the headphones are outside the transmission range or if
there is no audio signal received from the transmitter for more
than 5 minutes, the headphones switch off automatically.
SURR
LOHI
BASS
2s AUTO-ON
Analog
Digital
SURR
LOHI
BASS
12
3
ON
ON