Williams Sound WIR TX295 User manual

O VERVIEW
Thank you for purchasing the WIR 175 Listening System from Williams Sound Corp. Anyone
needing auditory assistance to overcome background noise, reverberation, or distance from the
sound source can benefit from the WIR 175.
You can use the WIR 175 for listening to the TV or other audio equipment, or for hearing assis-
tance in conference rooms. You can also use your RX4 Receiver in most facilities which have
an infrared transmitter operating on 95 kHz, such as theaters, cinemas, or churches.
If at anytime you have problems with the system, do not hesitate to call us toll-free at
1-800-843-3544.
S YSTEM C OMPONENTS
1. TX295 Transmitter 2. RX4 Receiver
•TV Microphone (MIC 084) • AAA Batteries
• 1m Audio Cable with dual RCA plugs (WCA 078) (BAT 010)
•Power Supply
S TEP 1: S ET U P T HE TX295 T RANSMITTER
The WIR TX295 Transmitter may be placed on top of a TV or shelf. Place the TX295 Transmitter where it is
clearly visible from your listening position.
Infrared light behaves like visible light, so it is blocked by solid objects. This confines the signal to the room
where the transmitter is located. The transmitter cannot be placed inside or behind anything except glass. The
maximum operating distance is approximately 30 feet (9 m).
WIR 175 Listening System Instructions
Model WIR TX295 Transmitter, WIR RX4 Receiver
Williams Sound
®
Helping People Hear

1
Receiver Charging Cradle
Battery
Charging
Port
Battery
Charging
Port
Receiver
Charging 
Indicator
Right
Battery
Charging
Indicator
Left
Battery
Charging
Indicator
Infrared
Transmitting
Diodes
Infrared
Transmitting 
Diodes
(only for WIR 
RX295 Receiver)
Williams
Sound

Ideally, the TX295 Transmitter should be at ear-level height or above. The infrared light pat-
tern is much like a floodlight “cone” as it leaves the transmitter, with the best reception inside
the cone.
Sunlight can cause infrared interference in the form of a buzz, hiss, or static. Thus, the system
cannot be used outdoors and may not work properly inside if a lot of direct sunlight is present.
Closing drapes or blinds will help if sunlight is a problem.
Any number of receivers may be used with the TX295 Transmitter, but use only one transmit-
ter in a room at the same time. Otherwise, interference will occur.
S TEP 2: C ONNECT THE T RANSMITTER P OWER S UPPLY
Plug the Power Supply cord into the “DC 12V” jack on the back of the TX295. Then plug the
Power Supply into an AC outlet.
S TEP 3: S ELECT AN O PERATING F REQUNCY FOR THE TX295 T RANSMITTER
To use the TX295 transmitter with the RX4 receiver, you must first setup the transmitter to oper-
ate in 95 kHz mode. Referring to the diagram above, slide the Stereo/Mono Selection Switch to
the “L” Left position for 95 kHz. The transmitter is now setup to operate with the RX4 receiver.
S TEP 4: C ONNECT THE T RANSMITTER TO THE A UDIO S OURCE
If you are using the TV Microphone, plug it into the “Mic” jack on the TX295 as shown. Use
the Velcro strip supplied to attach the microphone near the loudspeaker of your TV. The micro-
phone will allow you to play the TV at lower volume for other listeners and will pick up other
important sounds like the telephone or doorbell ringing.
Touse the supplied Audio Cable to connect the TX295 Transmitter directly to TV
,VCR, or
other equipment output jacks:
Connect the LEFT RCA plug from the TV (or VCR) speaker output into the LEFT RCA
jack on the TX295 transmitter. Remember, the Stereo/Mono Selection Switch must be in
the “L” Left position to transmit in 95 kHz!
When the Audio Inputs are used, the Mic input is automatically disabled.
NOTE: The TX295 has an automatic shut-offfeature that turns the Transmitter off90 seconds
after the audio signal is no longer present.
Williams Sound
®
Helping People Hear

2
S ETTING UP THE TX295 T RANSMITTER
Power
Input ST = Stereo mode
L=95 kHz mode
R = 250 kHz mode
Stereo/Mono Switch RCA Jack (connect from TV speaker output).
STEREO: Use both RIGHT and LEFT jack.
95 kHz or 250 kHz: Use LEFT jack only.
Mic
Jack
R
+
-
DC12V
L MIC
ST L R

STEP 5: INSTALL THE RECEIVER BATTERIES
Load two AAA batteries into the RX4 Receiver.
Be careful not to bend the plastic tabs when you
replace the battery door.
Be sure to insert the battery “plus” and “minus”
terminals correctly. DO NOT force them in back-
wards.
STEP 6: USING THE RECEIVER
Make sure your TV or Audio Source is turned ON.
Turn the receiver’s Power Switch to ON. Place the
headset on your head and locate the Volume
Control Wheel. (See Figure 3.)
The headband size can be adjusted by pulling or
pushing on each earpiece. Adjust the headset vol-
ume to a comfortable level.
The infrared receiver “eye” is located on top of
the headset. Do not cover it up or you will lose
reception.
Be sureto turnthe Receiver OFF when it is not
in use.
INCASE OF DIFFICULTY
If the system does not seem to be functioning:
1. Make sure that your television is plugged in
and turned on.
2. Make sure that the TX295 Transmitter is
plugged in and correctly connected to the TV
or VCR’s audio output.
3. Make sure the TX295 is operating on 95 kHz, not
stereo or 250 kHz mode. See Step 3.
4. If you’re using the TV Mic and not getting a sig-
nal: 1) Be sure the audio cable is not plugged
into the TX295; 2) Try turning the TV volume
up slightly; 3) Try positioning the TV mic
directly over the TV speaker.
5. Make sure that the RX4 Receiver has working
batteries.
6. Make sure you are not covering the RX4’s
infrared “eye.” Remove any objects obstruct-
ing the line between the TX295 Transmitter
and the RX4 Receiver.
7. If you’ve installed the TX295 Transmitter
other than on top of the TV, make sure that its
front panel is facing the RX4 Receiver.
8. If the system still does not function, call
Williams Sound Product Service at
1-800-843-3544.
W ARRANTY
The WIR 175 Listening System carries a five year
parts and labor warranty on the TX295 Transmitter
and RX4 Receiver.The TV microphone, earphones,
headphones, rechargeable batteries, adaptors, and AC
to DC Power Adaptor carry a 90 day warranty. Be
sure to fill out and mail the Warranty Card to register
your serial number and warranty.
On/Off
Switch
Volume
Control
Battery
Door
Williams Sound
®
Helping People Hear

3
FIGURE 3: RX4 RECEIVER

WIR 175 LISTENING SYSTEM SPECIFICATIONS
WIR TX295 Transmitter:
Size, Weight, Color: 6.25”L x 3.25”W x 1.25”H (15.9cm x 8.3cm x 3.2cm), 5.1oz. (140g), Gray
Power Input: 12 VDC (center is positive) on DC connector, 200 mA Class II wall transformer
TFP 024 Power Supply: North America: 120VAC, 60Hz, UL/CSA
TFP 032 Power Supply, 2 pin Euro mains plug, 230VAC, 50-60 Hz, CE
TFP 033 Power Supply, 3 pin UK mains plug, 230VAC, 50-60 Hz, CE
Subcarrier Frequency: 95 kHz or stereo or 250 kHz
Auto Power On/Off: Transmitter shuts off infrared after 1.5 minutes when audio signal is removed.
Battery charging functions remain on full time.
Microphone Input: 3.5 mm jack for MIC 084 Electret TV Microphone, 1.5 kΩ
Line Inputs: 2 RCA jacks for mono or stereo line-level sources. 200 mV min. to 10 V rms
max. input level, 5.1 kΩ
Automatic Level Control: 35 dB compression range
Infrared LEDs, Pattern: 8 IR LEDs, 45 degree cone-shaped coverage pattern to 6dB intensity, 30ft.
(9m) line of sight
Charging Ports: Charges one WIR RX295 Receiver (not included)
Warranty: 5 years*
RX4 Receiver:
Weight: 5.4 oz (154 g) with batteries
Earpad Size: 6.5 cm (2.5") Diameter, adjustable headband, uses HED 023 foam cushions
Material and Color: ABS plastic, Textured Gray
Battery Type, Life: 2 - AAA Alkaline, 50 hours
Modulation Frequency: 95 kHz FM, 50 µS de-emphasis
Frequency Response: 200 Hz to 8 kHz, ± 5 dB
Signal to Noise Ratio: 60 dB at 4 m
Controls: On/Offslide switch, volume control wheel
Acoustic Output: 105 dB MAX SSPL90, 100 dB HF AVG SSPL90 with 2 cc coupler
Compatability: Compatible with most wide-band 95kHz IR Transmitters
Warranty: 5years*
On Indicator: Red LED
*90 days on battery, power supply and cords.
Williams Sound Corp.
10321 West 70th St., Eden Prairie, MN 55344-3459
U.S.A. 800-328-6190 / 952-943-2252 / FAX: [phone]
www.williamssound.com
©2003, Williams Sound Corp. MAN 080E
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