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Additional Headphones for RS 145 comfort
HDR 145
Instruction manual
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Contents
Contents
Important safety instructions ................................................ 2
The HDR 145 RF headphones ................................................. 4
Delivery includes ...................................................................... 4
Product overview ..................................................................... 5
Overview of the headphones ................................................ 5
Overview of the acoustic signals .......................................... 5
Putting the HDR 145 into operation ..................................... 6
Inserting and changing the headphones’
rechargeable batteries ........................................................... 6
Charging the headphones’ rechargeable batteries .......... 6
Adjusting the headband of the headphones ..................... 7
Using the HDR 145 ................................................................... 8
Switching the headphones on and off ................................ 8
Searching for a sound source ................................................ 9
Adjusting the volume ............................................................. 9
Adjusting the balance .......................................................... 10
Switching the acoustic signals (beeps) on and off ........ 10
Cleaning the HDR 145 ........................................................... 11
If a problem occurs ... ............................................................ 12
Accessories and spare parts ................................................. 13
Specifications .......................................................................... 13
Manufacturer Declarations ................................................... 14
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Important safety instructions
Important safety instructions
• Please read this instruction manual carefully and
completely before using the device.
• Make this instruction manual easily accessible to all users
at all times. Always include this instruction manual when
passing the device on to third parties.
• Do not use the device in situations which require special
attention (e.g. when performing skilled jobs).
• Always keep the device dry and do not expose it to extreme
temperatures.
Intended use of the device
Intended use includes:
• having read this instruction manual, especially the chapter
“Safety instructions”,
• using the device within the operating conditions and
limitations described in this instruction manual.
“Improper use” means using the device other than as
described in this instructions, or under operating conditions
which differ from those described herein.
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Important safety instructions
Safety instructions for NiMH rechargeable batteries
If abused or misused, rechargeable batteries may leak. In
extreme cases, they may even present
• a heat hazard,
• a fire hazard,
• a leakage hazard,
• an explosion hazard,
• a smoke or gas hazard.
Please understand that Sennheiser does not accept liability
for damage arising from abuse or misuse.
Keep away from children. Only use original Sennheiser
rechargeable batteries.
Observe correct polarity. Do not short-circuit.
Do not expose to
moisture.
Do not pack charged batteries loose – danger of
shorting out/ fire hazard.
Do not continue to use
defective rechargeable
batteries.
Do not mutilate or
dismantle.
Immediately remove
rechargeable batteries
from obviously defective
devices.
When not using rechargeable batteries for extended periods of
time, charge them regularly (about every three months).
Switch rechargeable batterypowered devices off after use.
Only charge rechargeable
batteries with the appropriate
Sennheiser chargers.
Do not heat above 70 °C/158 °F,
e.g. do not expose to sunlight or
throw into a fire.
Only charge rechargeable batteries at ambient temperatures
between 10 °C and 40 °C.
Dispose of rechargeable
batteries at special collection
points or return them to your
specialist dealer.
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The HDR 145 RF headphones
The HDR 145 RF headphones
The HDR 145 headphones are part of the RS 145 comfort RF
stereo hi-fi headphone system. The closed, circumaural RF
stereo headphones offer excellent sound quality and allow for
wireless listening everywhere in the house and garden.
The lightweight headphones are extremely comfortable to
wear and very easy to use. The volume can easily be adjusted
to individual needs. Enjoy a completely unrestricted listening
experience without disturbing others.
Delivery includes
1 HDR 145 headphones
2 AAA size NiMH rechargeable batteries, 1.2 V
1 instruction manual
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Product overview
Product overview
An overview of the headphones is given on the inside front
cover of this instruction manual.
Overview of the headphones
1 Headband
2 Volume control
3 TUNE button
4 Balance control for R/L volume adjustment
5 ON/OFF switch
6 Earpad
Overview of the acoustic signals
Acoustic signal Meaning
6 short beeps No signal!
Transmitter is switched off
or out of range.
2 long beeps Rechargeable batteries are
almost flat.
Sequence of
3 beeps
Headphones have been
switched off.
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Putting the HDR 145 into operation
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Putting the HDR 145 into operation
Inserting and changing the headphones’ rechargeable batteries
Before using the HDR 145 for the first time, you have to insert
the supplied rechargeable batteries.
왘 Lift the left earpad 6 off as described under “Replacing the
earpads” on page 11.
왘 Insert the rechargeable batteries. Observe
correct polarity when inserting the
batteries.
왘 Put the earpad 6 back in place.
If the operating time decreases drastically even when
the rechargeable batteries are fully charged, the
rechargeable batteries are exhausted and have to be
replaced.
Charging the headphones’ rechargeable batteries
Charge the rechargeable batteries for at least 16 hours
prior to first time use. Subsequent charging time is
about the same time as the previous operating time.
The operating time is up to 23 hours.
왘 Place the headphones on the
charging cradle. Make sure that
the charging indictor on the
transmitter lights up red.
The headphones automatically
switch off and the rechargeable
batteries are being charged.
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Putting the HDR 145 into operation
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Always store the headphones on the charging cradle to
ensure that they are fully charged when they are
needed. When the rechargeable batteries are fully
charged, the transmitter automatically switches to
trickle charging and the charging indicator on the
transmitter flashes slowly.
Nearly discharged batteries will significantly reduce the sound
quality. Approx. 10 minutes before the batteries are
completely discharged, an acoustic signal is produced.
Adjusting the headband of the headphones
For good sound quality and best possible comfort, the
headband has to be adjusted to properly fit your head:
왘 Wear the headphones so that the
headband 1 runs over the top of your
head.
왘 Adjust the length of the headband so
that
– your ears are completely inside the
earpads,
– you feel even, gentle pressure around your ears,
– a snug fit of the headband 1 on the head is ensured.
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Using the HDR 145
Using the HDR 145
To switch the devices on and to listen to your sound source,
proceed as follows (for further information, please refer to the
RS 145 comfort instruction manual):
Sequence of steps Page
1. Make sure that the rechargeable batteries are
charged.
2. Set the volume to a low level. 8
3. Switch your headphones on. 8
4. Set the desired volume. 9
Switching the headphones on and off
CAUTION! Hearing damage due to high volumes!
Listening at high volume levels for long periods
can lead to permanent hearing defects.
왘 Before putting the headphones on, set the
volume to a low level (see page 9).
왘 Do not continuously expose yourself to high
volumes.
Switching the headphones on
왘 Set the ON/OFF switch 5 on the headphones to
the position ON
.
6
The headphones switch on and automatically start the
channel search on the last selected channel. If a channel is
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Using the HDR 145
found, the channel search stops. You hear the signal of the
found sound source.
If you do not hear the sound source after a short while, please
refer to the chapter “If a problem occurs ...” on page 12.
Switching the headphones off
왘 Set the ON/OFF switch 5 on the headphones
to the position OFF.
The headphones switch off.
Searching for a sound source
왘 Make sure that the operation indicator on the transmitter
is lit.
If you do not hear the desired sound source, continue the
search:
왘 Press the TUNE button 3 on the headphones
until you have found your sound source.
왘 If you cannot find your sound source, please refer to the
chapter “Changing the transmission channel” in the
RS 145 comfort instruction manual.
Adjusting the volume
왘 Use the volume control 2 to adjust the volume to a
sufficient and comfortable level.
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Using the HDR 145
Adjusting the balance
The balance control allows for right/left volume adjustment.
Adjust the balance so that you hear equally well with both
ears.
왘 Turn the balance control 4 to the left L or right R in order
to increase the volume for the corresponding ear. There is a
click-stop in the center position.
Switching the acoustic signals (beeps) on and off
An overview of the acoustic signals is given on page 5. The
acoustic signals can be switched on and off as follows:
왘 Switch the headphones on (see page 8).
왘 Press the TUNE button 3 for 5 seconds.
왘 Switch the headphones off for testing (see page 8).
If the acoustic signals are switched on, the headphones
produce a sequence of three beeps at switch-off. If no
beeps are produced, the acoustic signals are now switched
off.
The setting for the acoustic signals is retained in
memory until you change the setting again or replace
the rechargeable batteries.
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Cleaning the HDR 145
Cleaning the HDR 145
CAUTION! Liquids can damage the electronics of the
devices!
Liquids entering the housing of the devices can
cause a short-circuit and damage the electronics.
왘 Keep all liquids far away from the devices.
왘 Do not use any cleansing agents or solvents.
왘 Before cleaning, switch the devices off and disconnect the
transmitter from the mains.
왘 Only use a slightly damp cloth to clean the headphones.
Replacing the earpads
For reasons of hygiene, you should replace the earpads from
time to time. Spare earpads are available from your
Sennheiser dealer (see “Accessories and spare parts” on
page 13).
왘 To loosen the quarter turn fastener which
secures the earpads to the earcups, turn
the earpads 6 in the direction of the
arrow until you overcome a slight
resistance.
왘 Lift the earpads 6 off the earcups.
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If a problem occurs ...
If a problem occurs ...
You cannot hear anything
Possible cause Solution Page
Are the headphones
still within the
transmitter’s range?
Move the headphones closer to the
transmitter. If necessary, switch the
headphones on again.
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Are the
rechargeable
batteries charged?
Are the
rechargeable
batteries properly
inserted?
Place the headphones on the
charging cradle. Check the charging
indicator.
Remove the rechargeable batteries
and reinsert them into the
headphones.
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You can hear the sound only with one ear
Possible cause Solution Page
Is the balance
adjusted correctly?
Turn the balance control 4 to the
left or right.
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If a problem occurs that is not listed in the above tables or if
the problem cannot be solved with the proposed solutions,
please contact your Sennheiser partner for assistance.
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Accessories and spare parts
Accessories and spare parts
Only use original Sennheiser accessories and spare parts,
otherwise the device quality can be impaired or the devices
can be damaged.
Cat. No. Accessory/spare part
511792 1 pair of earpads
Specifications
RS 145 comfort system
Modulation FM, stereo
Frequency range 863 – 865 MHz
Frequency response 18 – 21,000 Hz
Signal-to-noise ratio typ. 68 dBA
Ambient temperature 0 °C to +40 °C
HDR 145 headphones
Transducer principle dynamic, circumaural, closed
Max. SPL (at 1 kHz) 110 dB
THD (at 1 kHz) < 0.5%
Power supply 2 AAA size NiMH rechargeable
batteries (LR 03)
Charging time approx. 16 hrs (full charge)
Operating time up to 23 hrs (with fully charged
rechargeable batteries)
Weight approx. 280 g
incl. rechargeable batteries
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Manufacturer Declarations
Manufacturer Declarations
Warranty
Sennheiser electronic GmbH & C o. KG gives a warranty of 24 months on this
product. For the current warranty conditions, please visit our web site at
www.sennheiser.com or contact your Sennheiser partner.
CE Declaration of Conformity
This equipment is in compliance with the essential requirements and other
relevant provisions of Directives
The declaration is available on the internet site at www.sennheiser.com.
Before putting the equipment into operation, please observe the
respective country-specific regulations!
Rechargeable batteries
The supplied 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.
WEEE Declaration
Your Sennheiser product was developed and manufactured with
high-quality 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.
2006/95/EG and 19
99/05/EG.
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Sennheiser electronic GmbH & Co. KG
Am Labor 1, 30900 Wedemark, Germany
www.sennheiser.com
Printed in China
Publ. 09/08
532025/A01