Sennheiser RS 175 User manual

How do I set up the RS 175 wireless headphones?
Please check out our Set Up Tutorial video: RS 175
OVERVIEW OF SET UP STEPS
Step 1: Remove all components from the box. These will include transmitter/charging station,
headphones, power cable, audio cable, batteries and adapters.
Step 2: Insert the batteries into the headphones.
Step 3: Use the power cable to connect the transmitter/charger to an electrical outlet.
Step 4: Charge the headphones. The charge indicator light will illuminate to indicate charging.
NOTE: The batteries in the headphones should be charged for 16 hours initially.
Step 5: Use the audio cable connect the transmitter/charger to the audio OUTPUT on the audio
source. NOTE: Depending on your audio source you may be connecting into a 3.5mm
headphone jack, red and white RCA audio outputs or a digital output.
Step 6: Turn on your audio source.
Step 7: Turn on your headphones which in turn will turn on your transmitter. The LED on the
headphones will illuminate and start blinking and the LED on the transmitter will light up and
remain solid.
Step 8: Wait 30-60 seconds for the wireless signal between the headphones and transmitter to be
established and then you will have audio.
What is the difference between RS 175 and TR 175 and HDR 175?
The RS 175 is the model number refers to the complete wireless headphone system. This system
consists of the transmitter (TR 175) and headphones (HDR 175).
What should I do if my RS 175 transmitter will not turn on?
With the RS 175 turning on the headphones activates the transmitter. To turn on the headphones
press and hold the power button on the headphones for three (3) seconds.
When the headphones are on the LED on the headphones will light up and the transmitter will
activate and hence the LED on the front of the transmitter will light up GREEN.
How do I connect to a DirecTV Genie Client box?

DirecTV Genie Client boxes offers a non-traditional audio output that requires a special
connector that you can get two ways
1. By calling Directv and ask them for the 10 pin connector that goes in the A/V out on
the back of the box
2. You can purchase the adapter from Amazon.com, please see link below:
10 Pin connectors
What do I do if my Assistive Listening System suddenly stopped working?
In a situation where a unit that has been functioning correctly has suddenly stopped
functioning for no apparent reason the issue is likely an internal electronics glitch caused
by a power surge. To resolve this issue an internal electronics reset is required.
Disconnect the transmitter (base station) from both the audio source and the power source
and at the same time remove the batteries from the headset. Leave the system
disconnected from power and the batteries out of the headset for 15 minutes. This gives
the internal electronics unit a chance to reset back to factory settings.
After the reset period reconnect the system to power and put the batteries back in the
headset and test the system.
What is the wireless signal range of a wireless Assistive Listening System?
As an industry standard the range of wireless headphones is measured "line of sight"
(headphones from transmitter) as it is the only way for all manufacturers to measure the
range in an equal manner.
The effective wireless signal transmission range (ie: how far the headphones can get from
the transmitter) will vary from product to product and is determined by the type of
wireless transmission signal (Infrared, radio frequency, etc) being used by the individual
wireless headphone system.
The effective wireless signal transmission range will also be affected by external factors
like obstacles, audio signal strength, wireless signal congestion, etc.
Why do I experience Static/Hum/Hiss when using an Infrared Assistive Listening
System?

Typically a static/hum/hissing sound in the infrared headset is caused by one of the
following events:
1) One of the RCA cables (red/white) is connected into an input rather than an output or
the 3.5 mm connection has been plugged into a digital output rather than an analog
output. To resolution is to make sure the audio cable is connected into analog audio
outputs.
2) There is some form of interference with the infrared beam of light from an external
source (ie: a lamp or other form of light is disrupting the infrared light). The resolution is
to remove this external interference. NOTE: If the unit is connected to an LED or plasma
TV the light from the screen can actually be causing the interference and we would
recommend switching to a radio frequency (RF) model rather than use an infrared model.
3) The hiss is being created by the audio connections themselves through a faulty
connection. The resolution is to try the unit on a separate independent audio source (like a
cable box, DVD player, iPad, stereo, etc). If the unit works correctly on the new audio
source you can then determine that the issue lies with the original audio connections and
new connections with the original audio source need to be established. NOTE: For testing
purposes we would recommend connecting directly to the audio source with the 3.5 mm
connection on the audio cable as it is possible that a faulty 3.5 mm to RCA adapter could
cause the issue.
4) The audio signal itself is corrupted and the hiss is actually part of the audio signal.
This typically occurs when a cable signal is involved. The resolution is to call the cable
company and request that the audio signal is reset.
Why do my speakers shut off when I connect my Assistive Listening System to the
headphone output?
A connection to the headphone jack of any audio component (ie: TV, A/V receiver,
computer, etc) will automatically disable the speakers.
If you need the speakers active so others can be enjoying the same audio we recommend
connecting your Assistive Listening System to the audio outputs (ie: RCA, optical output,
digital audio out, etc) of the audio component.
Why is the sound of my Assistive Listening System slightly behind the video image or
speaker sound?
The issue where the sound of the headphones is slightly behind the image on the TV or
audio from the speakers could be caused by the latency of the headphones (the time it
takes to transmit sound via a wireless signal) or it could be the device that the headphones
are connected into and how that device is outputting the audio signal that is the issue.
Latency occurs in all wireless headphones however the technology being used to create
the wireless signal does affect how much latency is caused. For example a Radio
Frequency (RF) model (like the Set 840) has a latency of approximately 3 m/s whereas a
KLEER digital model (like the RS 160/RS 170/RS 180) has a latency of approximately
45 m/s. Usually the delay (even at the 45 m/s level) is not discernible and hence goes
unnoticed.
The component that the headphones are connected to will also affect this issue and could
make the inherent latency more obvious. For example if a TV outputs sound to it's own
speakers slightly faster than it outputs sound to the audio output jacks that the
headphones are connected to then that would mean that there is a delay in the audio

getting to the headphones on top of the latency of the headphones so the difference
between audio and image would be more obvious.
To overcome latency issues sometimes the component that the headphones are connected
into will have a latency adjustment which can be used to adjust the component to match
up with the headphones. If the component does not have a latency adjustment then a
second option would be to connect the headphones directly to the audio source (ie: cable
box, DVD player, etc) so that the headphones get the audio signal slightly before the TV
and hence the latency factor compensates for getting the audio signal before the TV.
RF (Radio Frequency)
RF is the acronym for Radio Frequency.
Radio Frequency is a type of wireless signal.
Radio Frequency signals have the ability to pass through most obstacles (like walls).
Can different wireless headphones be used with different transmitters?
The different wireless headphone models utilize different signal transmission
technologies so the compatibility and interchangeability of the different wireless
headphone models is dependent on the specific wireless headphone models in question.
Please review the chart below for compatibility guidelines.

NOTE: The special features of the various models are not applicable if you interchange
models. For example if you take a set of headphones from one system (like the HDR 180
headphones from the RS 180 system) and pair it with a different system (like the RS 170)
the headphones will provide audio however the headphones will not have the additional
features (like Surround Sound) because the headphones do not have the supporting
internal electronics.
Can I use wireless headphones for performance applications or music practice?
Our wireless headphones are designed for home A/V use (like TV watching, music listening, etc)
not music performance and hence we do not recommend out wireless headphones for music
performance applications. The reason for this is that all wireless devices have some form of
latency (ie: the time it takes for audio to be transmitted wirelessly). The latency of wireless
headphones is fine for home A/V use but the latency is too great for performance use.

You would want something like EW 300 IEM G3 to go wireless with low latency, low noise and
an acceptable input-dynamic range for performance applications.
How do I get sound from BOTH the TV and headphones at the same time?
Having sound from BOTH the TV and the headphones at the same time is actually determined
by how the headphones are connected to the audio source. Generally speaking there are a couple
of ways of creating these connections which are:
1) If a set top box (cable box, DVR, etc) is in use look for audio output jacks on this device and
connect the headphones to the set top box to allow for independent operation of TV speakers and
headphones.
2) Check the TV manual/set up guide for an option that allows the TV to operate the speakers
and audio output jacks independently (ie: fixed output) to allow for independent operation of TV
speakers and headphones and connect into the audio output of the TV.
NOTE: If you have a dedicated headphone jack and use that connection it automatically cuts
sound to the TV speakers.
How do I get sound ONLY from the headphones and not the speakers?
Having sound ONLY from the headphones and not the TV is actually determined by how the
headphones are connected to the audio source. Generally speaking there are a couple of ways of
creating this type of connection which are:
1) Connect the headphones to a dedicated headphone jack which will usually automatically route
sound from the TV speakers to the headphone jack and hence audio is only coming out of the
headphone jack.
2) If a set top box (cable box, DVR, etc) is in use look for audio output jacks on this device and
connect the headphones to the set top box to allow for independent operation of TV speakers and
headphones and hence the TV volume can be turned down or muted.
3) Check the TV manual/set up guide for an option that allows the TV to operate the speakers
and audio output jacks independently (ie: fixed output) to allow for independent operation of TV
speakers and headphones and hence the TV volume can be turned down or muted.

How do I know if the wireless headphones will work on my audio device?
Our Wireless Headphone Systems can be connected into virtually any audio device and it is just
a matter of identifying the appropriate audio output port and then having the appropriate
connecting plug or component.
The type of connector you have available will depend on the Sennheiser Wireless Headphone
System that you choose. The type of audio output that you will have available to connect into
will depend on the audio device you are connecting to.
Typical audio output ports include:
- 3.5mm headphone port
- red and white RCA audio output ports
- digital audio output (either optical or coaxial)
NOTE: In some instances an adapter or extra component will be needed to make the appropriate
connection.
For example to change a 3.5mm headphone plug to an RCA connection you would use a female
3.5mm to male RCA adapter.
For example to change an analog connection (3.5mm headphone plug or red and white RCA
plugs) to a digital connection (ie: optical) you would use a digital to analog decoder (like the
OREI DA 34).