Sennheiser RS 175 User manual

RS 175

Digital Wireless Headphone System

Instruction Manual

Contents

Contents

Important safety information ...................................................................... 2

The RS 175 digital wireless headphone system ........................................ 4

Package includes ............................................................................................ 5

Product overview ........................................................................................... 6

Overview of the HDR 175 headphones ..................................................... 6

Overview of the TR 175 transmitter .......................................................... 7

Overview of indicators .................................................................................. 8

Putting the RS 175 into operation ............................................................ 11

Setting up the transmitter ......................................................................... 11

Connecting the transmitter to an audio source .................................... 12

Connecting the transmitter to an AC wall outlet .................................. 16

Inserting and replacing the rechargeable batteries ............................. 17

Charging the rechargeable batteries ....................................................... 18

Adjusting the headband ............................................................................ 19

Using your RS 175 headphone system ..................................................... 20

Switching your wireless headphone system on .................................... 20

Selecting an audio input ............................................................................. 21

Adjusting the volume ................................................................................. 21

Muting/unmuting the headphones ......................................................... 21

Activating/Deactivating the virtual surround sound ........................... 22

Activating/Deactivating the dynamic bass boost ................................ 23

Pairing headphones to the transmitter .................................................. 24

Switching your wireless headphone system off .................................... 25

Cleaning and maintaining the RS 175 ...................................................... 26

Replacing the ear pads ............................................................................... 26

Troubleshooting ........................................................................................... 27

Sound problems ........................................................................................... 27

Other problems ............................................................................................ 28

Leaving the range of the transmitter ...................................................... 29

Clearing the pair settings on the headphones ....................................... 29

Specifications ............................................................................................... 30

Manufacturer declarations ......................................................................... 31

RS 175 | 1

Important safety information

Important safety information

왘 Read this instruction manual carefully and completely before using the

product.

왘 Always include this instruction manual when passing the product on to

rd parties.

thi

왘 Do not use an obviously defective

Preventing damage to he

왘 Protect your hearing from high volume levels. Permanent hearing dam-

age may occur when headphones
long periods of time. Sennheiser headphones sound exceptionally good
at low and medium volume levels.

왘 Keep the headphones at least 10 cm/3.94” from cardiac pacemakers or

mplanted defibrillators. The headphones contain magnets that gener-

i
ate a magnetic field which could cause interference with cardiac pace­makers and implanted defibrillators.

왘 Keep the product, accessories and pac

dren and pets to prevent accidents and choking hazards.

왘 Do not use the product in situations which require special attention

. in traffic or when performing skilled jobs).

(e.g

Preventing damage to the product and malfunctions

왘 Always keep the product dry and do not

tures to avoid corrosion or deformation. The normal operating tem­perature is from 0 to 40°C/32 to 104°F.

왘 Use only attachments/accessories/spare parts sup

mended by Sennheiser.

왘 Unplug the power supply unit from the A

going to use the product for extended periods of time.

왘 Varnish or furniture polish may degrade the feet

which could stain your furniture. You should therefore place the trans­mitter on a non-slip pad to avoid potential staining of furniture.

alth and accidents

product.

are used at high volume levels for

kaging parts out of reach of chil-

expose it to extreme tempera-

plied or recom-

C wall outlet if you are not

of the transmitter,

2 | RS 175

왘 Do not place your headphones on a g

similar objects for long periods as this can widen the headband and
reduce the contact pressure of the headphones.

왘 Clean the product only with a soft, dry cloth.

Intended use/Liability

This wireless headphone system is suita
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 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 mis­use of this product and its attachments/accessories.

lass dummy head, chair armrest or

ble for use with hi-fi systems, TV

Important safety information

LR03

HR03

Safety instructions for standa

rd/rechargeable batteries

WARNING

In extreme cases, the standard/rechargeable batteries m
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

Do not continue using defective
standard/rechargeable
batteries and dispose of them

immediately.
contact each other –
danger of shorting out/
fire hazard.

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.

Do not charge standard
batteries.

Dispose of standard/

rechargeable batteries at

special collection points or

return them to your specialist

dealer.

Do not mix standard and

rechargeable batteries in the

battery compartments.

ay leak and may

RS 175 | 3

The RS 175 digital wireless headphone system

Digital

Analog

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 Sur­round 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 sig­nal 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 com­fortable 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-year warranty

4 | RS 175

Package includes

S
URR

LO

H

I

B
AS
S

Safety Guide

Quick Guide

PDF

Safety Guide

Safety Guide

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

Instruction manual CD in 15 languages (PDF files)

Safety guide

RS 175 | 5

Product overview

Product overview

Overview of the HDR 175 headphones

1

2

3

4

0

9

1 Headband

2 Charging contacts

3 Ear pads

4 Ear cups/Battery

com

partments

5 SURR Virtual surround

so

und button

5

6

8

7

6 Volume + button

7 Volume – button

8 BASS button

9 HDR power button

0 HDR status LED

6 | RS 175

Product overview

SURR

LO

HI

BASS

1

2

4

9

7

5

6

8

0

3

Overview of the TR 175 transmitter

1 TR status LED

2 BASS

button (with LED

indicator)

3 Virtual surround sound LED

in

dicators, low LO and high HI

4 SURR Virtual surround sound

bu

tton

7 DIGITAL OPTICAL IN Digital

optical audio inp

ut

8 Input selection switch

9 ANALOG

3.5 mm IN Analog

audio input (3.5 mm jack)

0 DC

9V 0.3A socket for the power

supply unit

5 Charge status LED indicator

6 Charging contacts

RS 175 | 7

Product overview

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 indi­cators 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

1s1s

1s1s

cannot connect to the transmitter.

The headphones are disconnected from or
cannot connect to the transmitter and the
rechargeable batteries are almost empty.

8 | RS 175

Product overview

1

2

LED indicators on the transmitter

1

2

3

4

SUR

R

L

O

HI

BASS

Charge 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.

After taking the headphones from the holder of the transmitter, the
charge statu

s LED indicates the approximate operating time of the

headphones:

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%

Surround sound LED Meaning

The surround sound is deactivated.

LO: Low surround sound mode is active.
HI: High surround sound mod

e is active.

RS 175 | 9

Product overview

1 s

1.5 s1.5 s

3

4

BASS LED Meaning

The dynamic bass boost is deactivated.

The dynamic bass boost is activated.

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 27).

10 | RS 175

Putting the RS 175 into operation

Putting the RS 175 into operation

Setting up the transmitter

왘 Choose a suitable place near your audio source.

왘 Separate the transmitter and other wireless devices in a room by at

east 50 cm/20” to avoid interference.

l

왘 Do not place the transmitter close to metal objects such as shelf bars,

einforced concrete walls, etc. as this can decrease the cover range of

r
the transmitter.

SURR

LO

HI

BASS

RS 175 | 11

Putting the RS 175 into operation

A

B

C

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

e 21).

pag

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.

왘 Switch your audio source off before connecting the transmitter.

왘 Check the connection options available for y

output, usually marked “OUT”).

왘 Select the corresponding connection cable and,

adapter.

왘 Depending on the connection option selected, go to the respective

r and follow the instructions on how to connect the transmitter

chapte
to an audio source.

our audio source (audio

if necessary, a suitable

Connection options available for
your audio source

Optical (digital) Optical digital cable 13

3.5 mm or 6.3 mm/¼“
jack socket (analog)

RCA (analog)

You can purchase accessories and adapters from your local
Sennheiser partner.

Connection cable Page

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)

Stereo audio cable with
adapter 3.5 mm jack socket to
2 RCA plugs (to be ordered
separately)

14

15

12 | RS 175

Putting the RS 175 into operation

O

PT

I

CA

L

Digital

OFF

A

Connection option A: Optical (digital)

To achieve the best possible listening experience, we recom

mended 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 devi

왘 Switch your audio source off befor

왘 Pull off the clear protective caps from both plu

ce to change from another audio stream (e.g. Bitstream) to PCM.

Digital

Sound menu

Digital sound output

PCM

Bitstream

*Sound menu may vary

e connecting the transmitter.

gs before connecting the

cable.

왘 Connect 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

dio source.

au

RS 175 | 13

Putting the RS 175 into operation

P

HONES

Analog

*

P

HO

N

ES

VOLUME

*

Adapter not included.

B

C

onnection 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 headp

hone socket. Check in the menu of your TV to see if the muting
function can be deactivated. Alternatively, connect the TV and the trans­mitter using a different option (A or C).

왘 Switch your audio source off before connecting the transmitter.

왘 If necessary, connect the adapter 6.3 mm/

¼“ jack plug onto the stereo

audio cable.

왘 Connect the stereo audio cable to the 3.5 mm jack socket of

mitter and to the headphone socket of your audio source.

Adjust the volume of the headphone socket on your audio source to
at least about the medium level.

the trans-

14 | RS 175

Putting the RS 175 into operation

*

Adapter not included

Analog

*

OFF

R

L

A

U

D

I

O

O

UT

C

Connection option C: RCA (analog)

왘 Switch your audio source off befor

왘 Plug the RCA adapter onto the stereo audio cable.

왘 Connect the stereo audio cable to the

transmitter.

왘 Connect the RCA plugs to the RCA outputs of your audio source (in most

ses “AUDIO OUT“). Connect the red RCA plug to the red RCA socket

ca
and the white RCA plug to the white or black RCA socket.

e connecting the transmitter.

3.5 mm jack socket of the

RS 175 | 15

Putting the RS 175 into operation

Connecting the transmitter to an AC wall outlet

1 Select a suitable country adapter and slide it onto the power supply

unit until it locks firmly in place.

2 Connect the power supply unit connector to the power input socket of

the transmi

3 Plug the power supply unit into an AC wall outlet.

The T
standby mode.

tter.

R status LED lights up for a second. The transmitter is in

1

EU

UK

2

US

AU

STANDBY

3

16 | RS 175

Putting the RS 175 into operation

1

2

3

4

5

NEW

Inserting and replacing the rechargeable batteries

1 Lightly twist the ear pads counterclockwise until you overcome a slight

resistance.

2 Lift the ear pads off the ear cups t

3 Insert the rechargeable ba

tteries 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 bat­teries. Please dispose old batteries as special waste or return them to
your specialist dealer.

o reveal the battery compartments.

4 Hook the ear pads onto the ear cups. A

s you put back the ear pads,

observe the L (left) and R (right) markings on the rear of the ear pads.

5 Twist 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 recharge­able, and if you are using non-rechargeable batteries, you must not
place the headphones on the headphones holder.

RS 175 | 17

Putting the RS 175 into operation

8.5h

Charging the rechargeable batteries

CAUTION Danger of damage to the headphones!

If you in
compartments, the batteries may leak during charging and
can damage your headphones.

왘 Do not place the headphones on the headpho

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 perfor­mance 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.

왘 Place the headphones on the headpho

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

y charged, the Charge status LED turns green.

full

sert non-rechargeable batteries into the battery

nes holder if

you are using non-rechargeable batteries.

nes holder of the transmitter.

RR
U
S

HI

LO

S

BAS

100%

When not in use, place the headphones on the headphones holder to
ensure that batteries are fully charged when needed. The transmit­ter 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 9).

18 | RS 175

Putting the RS 175 into operation

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 adjust­ment.

왘 Wear the headphones so that the headband runs over the top of your

ead. Observe the L (left) and R (right) markings on the outer head-

h
band when pu

왘 Adjust 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.

tting the headphones on.

RS 175 | 19

Using your RS 175 headphone system

VOLUME

S
U
RR

L
O

HI

B

A
SS

2s

AUTO-ON

Analog

Digital

S
U
RR

L
O

HI

BA
S

S

1

2

3

ON

ON

Using your RS 175 headphone system

Switching your wireless headphone system on

WARNING

Danger due to high volume levels!

Listening at high volume levels can lead to permanent hearing
defects.

왘 Before putting the headphones on and before togg

your audio inputs, adjust the volume on the headphones to a
low level. Toggling between different inputs may cause enor­mous volume jumps that can damage your hearing.

왘 Do not expose yourself to high volume levels for long periods of

me.

ti

1 Switch your audio source on.

If you are using the headphone socket (see page 14) to connect to your
audio source, adjust the volume of the headphone socket on your audio
source (e.g. TV) to at least the medium level.

2 Push the AUDIO INPUT SELECTION switch up or down to select your

udio source (see page 21).

a
The status LED on the transmitter lights up green.

3 Press and hold the HDR power button for approx. 2 seconds to switch

the headphones

on.
The transmitter in standby mode recognizes the active paired head­phones and automatically transmits a signal. The status LEDs on the
transmitter and the headphones light up green.

ling between

20 | RS 175

If the headphones are brought 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.

Using your RS 175 headphone system

Selecting an audio input

If both analog and digital audio inputs are connected to different audio
sources, the headphone system enables you to toggle between the two
inputs.

왘 Push the AUDIO INPUT SELECTION switch up to listen

connected to the digital optical input (see page 13).

왘 Push the AUDIO INPUT SELECTION switch down to listen to an audio

urce connected to the analog input (see pages 14 and 15).

so

to an audio source

Digital

Analog

Adjusting the volume

왘 Press the Volume + button or the Volume – button repeatedly until the

volume is adjusted to the desired level. When the minimum or maxi­mum volume setting is reached, you hear a beep in the headphones.

Vol Vol

Muting/unmuting the headphones

왘 Press the HDR power button to mute the headphones.

왘 Press the HDR power button or any of the Volume +/– buttons to

ancel the muting.

c

If the headphones are muted for 15 minutes, the headphones switch
off automatically to save energy.

RS 175 | 21

Using your RS 175 headphone system

LO

SURR

HI

High

OR

LO

SURR

HI

Low

LO

SURR

HI

Off

LO

SURR

HI

LO

SURR

HI

LO

SURR

HI

Activating/Deactivating the virtual surround sound

The RS 175 headphone system offers two virtual surround modes
(high HI/low LO) that simulate the sound generated by external stereo

kers, thus, producing spatial and livelier sound.

spea

The intensity of the surround effect however differs according to the mode
selected. Depending on your personal preference for spatial sound quality,
you can set the mode to either high HI or low LO.

왘 Press the SURR button on the headphones or the transmitter.

surround effect toggles between off and the 2 surround sound

The
modes, as indicated by the LO, HI LEDs.

SURR

LO

HI

B

Surround sound LED Meaning

Virtual surround sound is off.

Low LO virtual surround sound mode is
active.

High HI virtual surround sound mode is
active.

22 | RS 175

Using your RS 175 headphone system

BASS

Activating/Deactivating the dynamic bass boost

The dynamic bass boost increases the audio bass response.

왘 Press the BASS button either on the headphones or the transmitter.

The bass
by the BASS LED indicator.

boost effect switches between on and off modes, as indicated

SURR

OR

LO HI

BASS

BASS LED Meaning

The bass boost effect is active.

The bass boost effect is inactive.

BASS

bass boost direct

RS 175 | 23

Using your RS 175 headphone system

Pairing headphones to the transmitter

The headphones and the transmitter enclosed in this package have been
paired from the factory. The following procedure is only necessary if you
have cleared all pairing information from your wireless headphone system
and you want to revive the lost pairing, or if you want to pair another set
of headphones to the transmitter.

You can connect up to 2 paired headphones simultaneously with your
TR 175 transmitter.

왘 Place the headphones on the headphones holder of the transmitter for

econd.

a s
The Charge status LED on the transmitter lights up red. The head­phones are paired to the transmitter.

1s

R

SUR

HI

LO

BASS

24 | RS 175

Using your RS 175 headphone system

2s

SU
RR

LO

H
I

BA
SS

OFF AUTO-STANDBY

B

A

Switching your wireless headphone system off

There are two ways to switch your wireless headphone system off.

왘 Press and hold the HDR power button for approx. 2 seconds.

he headphones switch off. If no other pair of active wireless head-

T
phones is connected to the transmitter, the transmitter switches to
standby mode. All LEDs are off.

왘 Place the headphones on the headphones holder of the transmitter.

The he
page 18). If no other pair of active wireless headphones is connected to
the transmitter, the transmitter switches to standby mode.

adphones switch off and the charging process starts (see

OFF

R

SUR

HI

LO

AUTO-

BASS

STANDBY

To disconnect the transmitter from the power source, unplug the
power supply unit from the AC wall outlet.

RS 175 | 25

Cleaning and maintaining the RS 175

1

2

3

4

Cleaning and maintaining the RS 175

CAUTION

Liquids can damage the electronics of the product!

Liquids entering the housing of the product can cause a short-circuit and
damage the electronics.

왘 Keep all liquids away from the product.

왘 Do not use any cleansing agents or solvents.

To clean the wireless headphone system:

왘 Switch your wireless headphone system off and di

mitter from the AC wall outlet before cleaning.

왘 Clean the product only with a soft, dry cloth.

sconnect the trans-

Replacing the ear pads

For reasons of hygiene, you should replace the ear pads from time to time.
Spare ear pads are available at your local Sennheiser partner.

1 Lightly twist the ear pads counterclockwise until you overcome a slight

istance.

res

2 Lift the ear pads off the ear cups an

3 Hook the new ear pads onto the ear cups. Observe

R (right) markings on the rear of the ear pads.

4 Twist the ear pads clockwise until you hear a click sound. Ensure that

they are loc

ked firmly onto the ear cups.

d dispose of them properly.

the L (left) and

26 | RS 175

Troubleshooting

Troubleshooting

Sound problems

Problem Possible cause Possible solutions Page

Headphones are switched off. Switch the headphones on. 20

Check the connection of the power supply
unit.

Increase the volume on the audio source
to at least a medium level/Deactivate the
muting function from the audio source.

Pair the headphones with the transmitter
again.

Set the digital audio output of your
device/audio source to “PCM”, with a
sampling rate of max. 96 kHz (see the
instruction manual of your audio source).

Reduce the distance between headphones
and transmitter.

Remove obstacles between the
transmitter and headphones.

Change the position of the transmitter or
of the headphones.

Ensure that the transmitter is separated
from other wireless devices by at least
50 cm/20”.

Increase the volume on the analog audio
source to at least a medium level.

Check the audio output settings of your
TV and set the latency to “0”.

Decrease the volume of the analog audio
source at least to a medium volume level.

No sound

Occasional
sound
dropouts

Sound is too
low

Hear echoes
and TV tone
when using
headphones

Sound only on
one ear

Sound is
distorted

No power connection.

Headphones are muted. Deactivate the muting function. 21

Audio plug is not properly connected. Check the audio plug connection. 12

Audio source is switched off. Switch the audio source on. –

Volume of the analog audio source is
either set to the minimum or is on mute.

Audio cable is defective. Replace the audio cable. –

Headphones are not correctly paired
with the transmitter (e.g. additional
headphones).

Wrong audio input is selected. Select the other audio input. 21

Digital audio connection uses
incompatible data transmission settings.

Headphones are out of the transmitter’s
range.

Signal is shielded.

There are interfering devices (e.g. WLAN
routers, Bluetooth devices or microwaves)
in the vicinity.

Headphone volume is adjusted too low. Increase the volume on the headphones. 21

Volume of the analog audio source is
adjusted too low.

Some TVs can adjust a delay or latency
of the audio signal for the digital audio
output.

Audio cable is not properly connected. Check the plug connection. 12

Audio cable is defective. Replace the audio cable. –

Signal of the audio source is distorted. Reduce the volume of the audio source. –

Headphone volume is adjusted too high. Reduce the volume on the headphones. 21

Volume of the analog audio source is
adjusted too high.

16

–

24

–

–

–

11

–

–

–

–

RS 175 | 27

Troubleshooting

Other problems

Problem Possible cause Possible solutions Page

Transmitter
does not turn
on

Headphones do
not turn on

Operating time
decreases

You hear
beeps in the
headphones

Headphones
cannot be
connected to
the transmitter

No power connection.

The rechargeable batteries are almost
empty.

No batteries inside the battery
compartments.

The rechargeable batteries are inserted
the wrong way round.

The rechargeable batteries are exhausted.

The rechargeable batteries are almost
drained.

Distance to the transmitter is too large. Reduce the distance to the transmitter. –

Headphones are not paired with the
transmitter.

Another set of headphones is being
charged so I can‘t pair my second
headphones.

Headphones are not compatible.

Check the connection of the power supply
unit.

Recharge the rechargeable batteries. 18

Insert the rechargeable batteries. 17

Remove the rechargeable batteries from
the headphones and reinsert them again.
Observe correct polarity.

Replace the rechargeable batteries with
new ones.

Recharge the rechargeable batteries. 18

Pair the headphones with the transmitter. 24

Perform a proximity pairing:

1. Place the headphones as close as
possible to the transmitter.

2. Switch the headphones on.

3. Press the Volume +/- buttons
simultaneously for about 7 seconds.

Use Sennheiser HDR 165, 175, 185, or
195 wireless headphones only.

16

17

17

–

–

If you encounter a problem that is not listed in the table, or if the solutions provided do not work, please visit
the RS 175 product page at www.sennheiser.com for the most up-to-date list of frequently asked questions.

You may also contact your local Sennheiser service partner for assistance. To find a Sennheiser service partner
in your country, visit www.sennheiser.com.

28 | RS 175

Troubleshooting

S
UR
R

LO

HI

BA
S
S

1 2

BASS

SURR

BASSBASS

SURRSURR

2s

Leaving the range of the transmitter

The range of the transmitter largely depends on environmental conditions
such as wall thickness, wall composition etc. If the headphones leave the
range of the transmitter, the audio first cuts out occasionally until it finally
cuts out completely.

If you re-enter the transmission r

ange within 5 minutes, the connection is

automatically re-established.
If you spend more than 5 minutes outside the transmission range, the
headphon

es switch off automatically.

Clearing the pair settings on the headphones

1 Press the Volume +/- buttons simultaneously and hold for 2 seconds.

The HDR status LED blinks red rapidly.

2 Press the HDR power button while continuously holding the Volume

+/- buttons. Release all 3 buttons.

The HDR s
condition, and starts blinking slowly. The pair settings on the head­phones are cleared.

tatus LED lights up green or red, depending on the battery

RS 175 | 29

Specifications

Specifications

RS 175 headphone system

Carrier frequency 2.40 to 2.48 GHz

Modu

lation 8-FSK Digital

SNR

RF output power max. 10 dBm Class 1

Transmission range up to 100 m/328 ft line of sight

Max. number of
simultaneously connected
headphones

Temperature range

Relative humidity

analog input: typ. 85 dBA at 1 V

digital input: > 90 dBA

2

Operation: 0°C to +40°C/32°F to 104°F
Storage: -25°C to +70°C/-13°F to 158°F

Operation: 10 to 80%, non condensing
Storage: 10 to 90%

rms

HDR 175 headphones

Transducer principle circumaural, closed

Transducer system dynamic, neodymium magnets

Frequency response 17 Hz to 22 kHz

Max. SPL max. 114 dB at 1 kHz, 3% THD

THD < 0.5% at 1 kHz, 100 dB SPL

Operating time up to 18 hours

Charging time of
rechargeable batteries

Power supply

Weight (incl. batteries) approx. 310 g

Dimensions (W x H x D) approx. 17 cm x 20 cm x 9.5 cm

TR 175 transmitter

Connections

Power supply 9 V , 300 mA

Power consumption

Dimensions (W x H x D) approx. 12.7 cm x 23.4 cm x 10 cm

up to 8 hours 30 min

2 AAA size low self-discharge NiMH
rechargeable batteries, 1.2 V, 820 mAh

Digital: optical
Analog: 3.5 mm stereo jack socket

Operation: typ. 4 W
Standby mode: ≤ 0.3 W (without

charging)

30 | RS 175

Sennheiser NT 9-3AW power supply unit

Rated input 100 – 240 V~, 50 – 60 Hz, 80 mA

Rated output 9 V , 300 mA

Temperature range

Relative humidity

Operation: 0°C to +40°C/32°F to 104°F
Storage: -25°C to +70°C/-13°F to 158°F

Operation: 10 to 80%, non condensing
Storage: 10 to 90%

Manufacturer declarations

Manufacturer declarations

Warranty

Se nnheiser ele ctronic GmbH & Co . KG giv es a war ranty of 24 mo nth s on this
product

For the current warranty conditions, please visit our website at
www.sennheiser.com or contact your Sennheiser partner.

FOR AUSTRALIA ONLY

Sennheiser goods come with guarantees that cannot be excluded under
the Australian Consumer Law. You are entitled to a replacement or refund
for a major failure and compensation for any other reasonably foreseeable
loss or damage. You are also entitled to have the goods repaired or
replaced if the goods fail to be of acceptable quality and the failure does
not amount to a major failure.

This warranty is in addition to other rights or remedies under law. Nothing
in this warranty excludes, limits or modifies any liability of Sennheiser
which is imposed by law, or limits or modifies any remedy available to the
consumer which is granted by law.

To make a claim under this warranty, contact Sennheiser Australia Pty Ltd,
Unit 3, 31 Gibbes Street Chatswood NSW 2067, Australia;
Phone: [phone], email: [e-mail]

All expenses of claiming the warranty will be borne by the person making
the claim.

The Sennheiser International Warranty is provided by Sennheiser Australia
Pty Ltd (ABN 68 165 388 312), Unit 3, 31 Gibbes Street Chatswood NSW
2067, Australia.

.

In compliance with the following requirements

• WEEE Directive (2012/19/EU)

dispose of this product at the end of its operational life-

Please
time by taking it to your local collection point or recycling center
for such equipment.

• Battery Directive (2013/56/EU)

The supplied standard/rechargeable batteries can be recycled.
Please dispose of them as special waste or return them to your
specialist dealer. In order to protect the environment, only dis­pose of exhausted batteries.

CE Declaration of Conformity

• R&TTE Directive (1999/5/EC)

EMC Directive (2014/30/EU)

•

• Low Voltage Directive (2014/35/EU)

• ErP Directive (2009/125/EC)

• RoHS Directive (2011/65/EU)

The CE Declaration of Conformity is available on our website at
www.sennheiser.com.

RS 175 | 31

Manufacturer declarations

SENNHEISER
Model No: RS 175

FCC Declaration of Conformity (DoC)

We,

Sennheiser Electronic Corporation
One Enterprise Drive • Old Lyme •
CT 06371 • USA
Tel: [phone]
Fax:

[phone]

declare the above device comply with the requirements of Federal Communications Commission.

This device complies with Part 15 of the FCC rules. Operation is subjected to t he following two c onditions:

1) This device may not cause harmful interference, and

2) This device must accept any interference received, including interference that may cause undesired operation.

Responsible Party: Greg Beebe

Statements regarding

FCC and Industry Canada

This device complies with Part 15 of the FCC Rules and with RSS-210 of
I

ndustry Canada. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may
cause undesired operation.

This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a partic­ular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the inter­ference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

CAN ICES-3 (B)/NMB-3(B)

RF Radiation Exposure Information

Since the radiated output power of this device is far below the FCC radio

equency exposure limits, it is not subjected to routine RF exposure eval-

fr
uation as per Section 2.1093 of the FCC rules.

Trademarks

Sennheiser is a registered trademark of Sennheiser electronic GmbH & Co. KG.

product and company names mentioned in this instruction manual may

Other

32 | RS 175

be the trademarks or registered trademarks of their respective holders.

Sennheiser electronic GmbH & Co. KG

Am Labor 1, 30900 Wedemark, Germany
www.sennheiser.com

Publ. 01/15, A01