Sennheiser RS 175 User manual

RS 175 | 1
RS 175
Digital Wireless Headphone System
Instruction Manual

Important safety information
2 | RS 175
Important safety information
왘Read this instruction manual carefully and completely before using the
product.
왘Always include this safety guide when passing the product on to third
parties.
왘Do not use an obviously defective product.
Preventing damage to health and accidents
왘Protect your hearing from high volume levels. Permanent
hearing damage may occur when headphones are used at
high volume levels for long periods of time. Sennheiser head-
phones sound exceptionally good at low and medium volume levels.
왘Do not use the product in situations which require special attention
(e.g. in traffic or when performing skilled jobs).
왘The product generates stronger permanent magnetic fields
that could cause interference with cardiac pacemakers,
implanted defibrillators (ICDs) and other implants. Always
maintain a distance of at least 3.94"/10 cm between the product com-
ponent containing the magnet and the cardiac pacemaker, implanted
defibrillator, or other implant.
왘Do not use the product near water and do not expose it to rain or mois-
ture to reduce the risk of fire or electric shock.
왘Keep the product, accessories and packaging parts out of reach of chil-
dren and pets to prevent accidents. Swallowing and choking hazard.
왘Use only power supply units provided by Sennheiser.
Preventing damage to the product and malfunctions
왘Always keep the product dry and do not expose it to extreme tempera-
tures to avoid corrosion or deformation. The normal operating tem-
perature is from 0 to 40°C/32 to 104°F.
왘Use the product with care and store it in a clean, dust-free environ-
ment.
왘Do not use the product if it is obviously defective, if it has been dropped
or if liquids or objects have gotten inside the product. In this case, con-
tact a qualified specialist workshop or your Sennheiser service partner
to have the product checked.
왘Switch the headphones off after use to conserve battery power.
Remove the batteries if the product will not be used for extended peri-
ods of time.
왘Unplug the power supply unit from the AC wall outlet
– to completely disconnect the product from the power source,
– during lightning storms, or
– when unused for long periods of time.
왘Ensure that the power supply unit is
– in a safe operating condition and easily accessible,
– properly plugged into the AC wall outlet,
– operated only within the permissible temperature range,
– not exposed to direct sunlight for longer periods of time in order to
prevent heat accumulation.

Important safety information
RS 175 | 3
왘Do not place your headphones on a glass dummy head, chair armrest or
similar objects for long periods as this can widen the headband and
reduce the contact pressure of the headphones.
왘Varnish or furniture polish may degrade the feet of the transmitter,
which could stain your furniture. You should therefore place the trans-
mitter on a non-slip pad to avoid potential staining of furniture.
왘Do not operate the product near heat sources.
왘Clean the product only with a soft, dry cloth.
왘Use only attachments/accessories/spare parts supplied or recom-
mended by Sennheiser.
Intended use/Liability
This wireless headphone system is suitable for use with hi-fi systems, TV
sets, and home cinema systems and supports both analog and digital sig-
nals simultaneously.
This product is intended for private domestic use only. It is not suitable 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 application
not named in this instruction manual and the associated product guides.
Sennheiser does not accept liability for damage arising from abuse or mis-
use of this product and its attachments/accessories.
Before putting devices into operation, please observe the respective coun-
try-specific regulations.

Important safety information
4 | RS 175
Safety instructions for standard/rechargeable batteries
WARNING
In extreme cases, the standard/rechargeable batteries may leak and may
cause the following hazards if abused or misused:
•explosion
•fire
•heat
•smoke/gas
Keep away from
children.
Do not heat above 70°C/158°F,
e.g. do not expose to sunlight
or throw into fire.
Do not expose to
moisture.
When not using rechargeable
batteries for extended periods
of time, charge them regularly
(about every 3 months).
Do not mutilate or
dismantle.
When not using the product
for extended periods of time,
remove the standard/
rechargeable batteries.
Observe correct polarity. Use only rechargeable batteries
and chargers recommended by
Sennheiser.
Pack/store standard/
charged rechargeable
batteries so that the
terminals cannot
contact each other –
danger of shorting out/
fire hazard.
Do not continue using defective
standard/rechargeable
batteries and dispose of them
immediately.
Switch battery-powered
products off after use.
Immediately remove standard/
rechargeable batteries from an
obviously defective product.
Charge rechargeable
batteries at ambient
temperatures between
10 and 40°C/50 and
104°F.
Dispose of standard/
rechargeable batteries at
special collection points or
return them to your specialist
dealer.
Do not charge standard
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
Taking home entertainment to the next level, Sennheiser’s RS 175 offers
an impressive range of features in a compact, ergonomic package, so that
you can enjoy music and television to the fullest. The Bass Boost and Sur-
round Sound listening modes will allow you to experience your home
entertainment system like never before – the former increases the audio
bass response while the two virtual surround modes offer a more spatial
and livelier stereo sound.
What’s more, the innovative digital wireless technology ensures that sig-
nal transmission remains clear and accurate as you move from room to
room. Additionally, the user-friendly design makes it easy to set up and
enjoy the RS 175. The main controls are located on the headphones, so
nothing will distract you from an exciting audio experience, and the com-
fortable fit is ideal for extended periods of use.
Sennheiser’s RS 175: Home entertainment just got 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)
• Enables switching between dynamic bass and virtual surround sound
listening modes for situational 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-yearwarranty
Digital
Analog

Package includes
6 | RS 175
Package includes
HDR 175 headphones
TR 175 transmitter
Power supply unit with multi-country adapters
(EU, UK, US, AU)
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
compartments
5SURR Virtual surround
sound button
6Volume + button
7Volume – button
8BASS button
9HDR power 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
indicator)
3Virtual surround sound LED
indicators, low LO and high HI
4SURR Virtual surround sound
button
5Charge status LED indicator
6Charging contacts
7DIGITAL OPTICAL IN Digital
optical audio input
8Input selection switch
9ANALOG 3.5 mm IN Analog
audio input (3.5 mm jack)
0DC 9V 0.3A socket for the power
supply unit

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

Product overview
10 | RS 175
LED indicators on the transmitter
After taking the headphones from the holder of the transmitter, the
charge status LED 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/battery fault has been detected.
Charge status LED Operating time Battery capacity
up to 4 hours 0 to 25%
approx. 4 to 9 hours 25 to 50%
approx. 9 to 14 hours 50 to 75%
approx. 14 to 18 hours 75 to 100%
2Surround sound LED Meaning
The surround sound is deactivated.
LO: Low surround sound mode is active.
HI: High surround sound mode is active.

Product overview
RS 175 | 11
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 AC wall
outlet.
The transmitter is in standby mode.
The transmitter and headphones are
connected.
The transmitter detects an incompatible
digital audio streaming input (see page 28).
1 s
1.5 s1.5 s

Putting the RS 175 into operation
12 | RS 175
Putting the RS 175 into operation
Setting up the transmitter
왘Choose a suitable place near your audio source.
왘Separate the transmitter and other wireless devices in a room by at
least 50 cm/20” to avoid interference.
왘Do not place the transmitter close to metal objects such as shelf bars,
reinforced concrete walls, etc. as this can decrease the cover range of
the transmitter.
SURR
LO HI
BASS

Putting the RS 175 into operation
RS 175 | 13
Connecting the transmitter to an audio source
You can simultaneously connect 2 different 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 2 audio sources, you can
toggle between them using the AUDIO INPUT SELECTION switch (see
page 22).
왘Switch your audio source off before connecting the transmitter.
왘Check the connection options available for your audio source (audio
output, usually marked “OUT”).
왘Select the corresponding connection cable and, if necessary, a suitable
adapter.
왘Depending on the connection option 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 beginner’s video guides on how to connect
your digital wireless headphone system to a TV at
www.sennheiser.com/how-to-videos.
Connection options available for
your audio source Connection cable Page
Optical (digital) Optical digital cable 14
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)
15
RCA (analog)
Stereo audio cable with
adapter 3.5 mm jack socket to
2 RCA plugs (to be ordered
separately)
16
You can purchase accessories and adapters from your local
Sennheiser partner.
A
B
C

Putting the RS 175 into operation
14 | RS 175
Connection option A: Optical (digital)
To achieve the best possible listening experience, we recommended that
you connect your RS 175 headphone system to your home cinema or hi-fi
system using the supplied optical digital cable.
Your wireless headphone system allows digital audio streaming using only
PCM audio output from devices connected through the optical digital input
DIGITAL OPTICAL IN. Refer to the sound menu or the instruction manual of
your device to change from another audio stream (e.g. Bitstream) to PCM.
* The appearance of the Sound menu can vary depending on the device
you are using.
왘Switch your audio source off before connecting the transmitter.
왘Pull off the clear protective caps from both plugs before connecting the
cable.
왘Connect one end of the optical digital cable to the DIGITAL OPTICAL 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
RS 175 | 15
Connection option B: 3.5 mm or 6.3 mm/¼“ jack socket (analog)
Some TV models mute the loudspeakers when you connect the transmitter
to the headphone socket. Check in the menu of your TV to see if the muting
function can be deactivated. Alternatively, connect the TV and the trans-
mitter using a different option (A or C).
왘Switch your audio source off before connecting the transmitter.
왘If necessary, connect the adapter 6.3 mm/¼“ jack plug onto the stereo
audio cable.
왘Connect the stereo audio cable to the 3.5 mm jack socket of the trans-
mitter 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 about the medium level.
P
HONES
Analog
*
P
HO
N
ES
VOLUME

Putting the RS 175 into operation
16 | RS 175
Connection option C: RCA (analog)
왘Switch your audio source off before connecting the transmitter.
왘Plug the RCA adapter onto the stereo audio cable.
왘Connect the stereo audio cable to the 3.5 mm jack socket of the
transmitter.
왘Connect the RCA plugs to the RCA outputs of your audio source (in most
cases “AUDIO OUT“). Connect the red RCA plug to the red RCA socket
and the white RCA 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
RS 175 | 17
Connecting the transmitter to an AC wall outlet
1Select a suitable country adapter and slide it onto the power supply
unit until it locks firmly in place.
2Connect the power supply unit connector to the power input socket of
the transmitter.
3Plug the power supply unit into an AC wall outlet.
The TR status LED lights up for a second. The transmitter is in
standby mode.
STANDBY
2
3
1
US
EU
UK
AU

Putting the RS 175 into operation
18 | RS 175
Inserting and replacing the rechargeable batteries
1Lightly twist the ear pads counterclockwise until you overcome a slight
resistance.
2Lift the ear pads off the ear cups to reveal the battery compartments.
3Insert the rechargeable batteries into the compartments. To replace the
batteries, pull the batteries out of the compartments and insert the
new ones. Be sure to observe correct polarity when inserting the bat-
teries. Please dispose old batteries as special waste or return them to
your specialist dealer.
4Hook the ear pads onto the ear cups. As you put back the ear pads,
observe the L(left) and R(right) markings on the rear of the ear pads.
5Twist the ear pads clockwise until you hear a click sound. Ensure that
they are locked firmly onto the ear cups.
You can also power the headphones using standard batteries (AAA
size, 1.5 V). Note however, that standard batteries are not recharge-
able, and if you are using non-rechargeable batteries, you must not
place the headphones on the headphones holder.
12
345
NEW

Putting the RS 175 into operation
RS 175 | 19
Charging the rechargeable batteries
In general, a complete charging cycle takes about 8.5 hours. However,
before using the headphones for the first time, charge the rechargeable
batteries for at least 16 hours without interruption to optimize the perfor-
mance of the batteries.
When the rechargeable batteries are almost empty, the HDR status LED
turns red and you hear beeps in the headphones. The headphones switch
off after few minutes.
왘Place the headphones on the headphones holder of the transmitter.
You may place the headphones on either side provided that the
charging contacts of the headphones and the transmitter connect.
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 turns 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.
왘Do not place the headphones on the headphones holder if
you are using non-rechargeable batteries.
8.5h
When not in use, place the headphones on the headphones holder to
ensure that batteries are fully charged when needed. The transmit-
ter utilizes an intelligent battery charging technology that prevents
overcharging.
After taking the headphones from the holder of the transmitter, the
Charge status LED indicates the approximate operating time of the
headphones (see page 10).
SURR
LO HI
BASS
100%

Putting the RS 175 into operation
20 | RS 175
Adjusting the headband
For good sound quality and best possible wearing comfort, the headband
has to be adjusted to properly fit your head. The headphones feature an
adjustable headband with a snap-in locking mechanism for easy adjust-
ment.
왘Wear the headphones so that the headband runs over the top of your
head. Observe the L(left) and R(right) markings on the outer head-
band when putting the headphones on.
왘Adjust the length of the headband until
– 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