CAT 070A- WIR TX800
SoundPlus ® WIR TX800 Infrared System
Two Channel IR Hearing Assistance System
The Pro’s Choice:
The SoundPlus® Two–Channel Large Area Infrared System: TX8 Infrared Emitter,
MOD 112 Two-Channel Infrared System Modulator
Infrared Advantages:
Quality & Control
This wireless lightwave system
designed for group listening helps
anyone needing auditory assistance to overcome background
noise, reverberation, and distance
from the sound source. Listeners
use personal receivers anywhere
within the 10,000–15,000 sq. ft.
coverage area to hear crystal
clear sound directly from the
sound system.
service. For musical programs,
stereo mode is most appropriate.
Transmission is confined within
opaque walls, making the system
perfect for courtrooms, movie
theaters, boardrooms, and
anywhere privacy is valued.
Two Channel Versatility
The TX800 Infrared System can be
operated in either Discrete or
Stereo mode, letting you use the
channels independently or in
stereo. Common discrete mode
applications include two-channel
simultaneous language interpretation and simultaneous hearing
assistance and visual description
“Super Clean” Audio &
Audio Processing
With its studio grade components, the MOD 112 offers full
range frequency response and
“super clean” audio. The sophisticated audio processor provides
both limit and compress functions, while bar graph indicators
help you monitor level changes.
The system accepts mic or line
inputs with automatic, electronic
switching. And because there’s
no attenuator, noise degradation
is prevented.
Setting Up Is Easy
The MOD 112 comes with
mounting hardware and cables.
It can be connected to your
existing sound system or used
with any standard, lo–Z microphone. One or more TX8 emitters
are installed in the listening area,
connected to the MOD 112 by
coaxial cable. Each emitter
90 days on headphones, microphones, and accessories
operates on its own
low-voltage power supply and
repeats the baseband signal for
an additional emitter.
Sturdy emitter stands are also
available, giving you the choice
of permanent or portable
installation. In addition, multiple
systems can be linked to cover
very large rooms.
Compatible with other
95 kHz/250 kHz systems, the
MOD 112 and TX8 emitters can
be used with many types of
infrared receivers.
The Williams Sound Warranty:
Your Assurance Of Quality
At Williams Sound, we’re certain
of our quality. That’s why we
back the TX800 Infrared System
with a 5-year warranty*, your
assurance of both quality and
Sound ®
Helping People Hear
SoundPlus® WIR TX800 Infrared System Specifications
Two–Channel Infrared Modulator, Model MOD 112
Dimensions, Weight:
Rack Mount:
Baseband Output:
Carrier Timers:
Operating Requirements:
MOD 112 Front Panel
8.45" (21.5 cm) W x 8.18" (20.8 cm) D x 1.72" (4.4 cm) H, 3 lbs. (1.5 kg)
Black epoxy paint with white legends
One IEC rack space high, one or two units can be mounted in a single rack space with
optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits
External power supply, 24 VAC, 50 or 60 Hz, 10 VA maximum
50 Ω source impedance
100 mV per carrier
Channel 1: 95 kHz ± 50 kHz deviation, 50 µsec pre-emphasis
Channel 2: 250 kHz ± 50 kHz deviation, 50 µsec pre-emphasis
Variable slope compressor or soft limiter, switch selected
One 30 minute (approx.) timer per channel. Turns off carrier if channel is silent
(lowest light on bar graph does not light) for full 30 minutes.
0-50°C ambient temperature, non-condensing, non-corrosive atmosphere
Phones Switch:
Phones Output:
Infrared Test LED:
MOD 112 Rear Panel
Channel 1
-21 -18 -15 -12 -9 -6 -3 0 +3 +6
Power Switch:
Power Indicator:
Audio Level Controls:
Audio Indicators:
Carrier (CXR) LEDs:
Limit/Compress Switch:
Stereo/Discrete Switch:
Williams Sound
MOD 112 Two-Channel Infrared System Modulator
CH 1 Level
Channel 2
-21 -18 -15 -12 -9 -6 -3 0 +3 +6
Test Out
CH 2 Level
Two-position rocker, ON/OFF
Green LED
1 rotary control per channel
One (1) 10 LED bar graph per channel
1 green carrier “on” indicator LED per channel
Selects variable slope compression or soft limiting
Selects stereo (coupled processing and timers, stereo monitoring) or
discrete (Independent processing and timers, mono monitoring)
Selects CH 1 or CH 2 for phones when mode is in discrete position
1/4" stereo phones jack. Produces stereo or mono output depending on modulation
mode selected. Accepts stereo, mono, and any impedance phones.
IR LED for receiver testing, monitoring, and audio signal testing.
Effective to about 2 feet from front panel
Ch 1 Audio Input Ch 2 Audio Input
Model WIR MOD112 Two-Channel Infrared System Modulator
Power: 24 VAC,
50-60 Hz, 10VA
Mic (XLR)
Mic Input:
Balanced Line Input:
Baseband Output:
Baseband Loopthru Input:
Power Connections:
Emitter Type:
Accessory Connector:
Bal or Unbal
Line (1/4")
50 Ohms
50 Ohms
Williams Sound Corp., Minneapolis, MN USA
Combination jack, 3 pin XLR, balanced or unbalanced, lo-Z, 100 µV min. to 90 mV max.
1m V nominal, 3 kΩ input impedance. Supplies simplex power 15 V (DIN45296) for condenser mics
Combination jack, 1/4" TRS jack. 21 mV min. to 10 V max., 212 mV nominal,
100 KΩ input impedance. Accepts unbalanced or balanced line level inputs
(1) BNC connector, 50Ω, 100 mV RMS per carrier, use RG-58 cable
(1) BNC connector, 50Ω
3-pin molex
For use with Williams Sound TX8 Linear Emitters. For multi-emitter systems,
each emitter repeats the baseband signal to drive the next emitter in the chain.
9-pin, Sub–D female, various circuit connections
(See diagram on top panel and in manual for details)
Note: Infrared receiver performance can be degraded if this system is used in close proximity to high-efficiency lighting
equipment with solid state ballasts (i.e. high frequency fluorescent).
Multi–Channel Infrared Emitter, Model TX8
Dimensions, Weight:
Wall Mount:
Tripod Mount:
Operating Req.:
Coverage Area:
11.25" W x 6.25" H x 2.125" D (28.6 cm x 15.9 cm x 5.4 cm) 1.9 lbs. (0.9 kg)
Black epoxy paint with white legends, red acrylic window
Omnidirectional mount included for wall and ceiling mounting.
Optional SS-6 Tripod Stand Kit available
External power supply, 24 VAC, 50 or 60 Hz, 50 VA, 0.9 A nom. current drain
0-50° C ambient temperature, non-condensing, non-corrosive atmosphere
10,000 sq. ft. (930 sq. m), 50° cone pattern, see coverage diagrams
TX8 Front Panel:
Power Indicator:
Baseband Indicator:
Red LED, visible from bottom through vent holes, lower right
Red LED, visible from bottom through vent holes, lower left
TX8 Rear Panel:
Mounting Plate
Ball Shaft
Clamp Plate
Multi-Channel Infrared Transmitter
Sound ®
Helping People Hear
Williams Sound Corp., Minneapolis, Minnesota, USA
Made in U.S.A.
Note: It is normal for this unit to feel warm while it is in operation.
Power Supply Wiring:
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Baseband Signal Wiring:
Use RG58 Coax,1000 ft. (350m) max. length
Power In:
Baseband (Modulation)
Tension Screw
50 Ohms
Power On
Mounting Holes:
Baseband Input:
Baseband Output:
Power Connection:
Baseband Cable:
Power Cable:
Baseband On
Wall/Ceiling Mount Included
One set of threaded holes for use with omnidirectional mount (included)
Two threaded holes on sides of the cabinet for Tripod Stand Kit
BNC connector, 50 Ω, 50 kHz to 500 kHz carriers, 100 mV nominal per carrier,
10 V RMS maximum aggregate baseband amplitude
BNC connector, 50 Ω, 50 kHz to 1 MHz baseband
3-pin molex
RG-58 Coax, BNC-connectors
NEC Class 2 wiring, 2-conductor, 18 ga.; 200 foot (61 m) max. length (for 18 ga. wire)
Wire Gauge Options: 22 ga.: 0–10'; 20 ga.: 0–75'; 18 ga.: 0–200'
Each TX8 Transmitter requires its own 24 VAC Power Supply
Two–Channel Infrared Receiver, Model WIR RX5 (not included)
Size and Weight:
Color and Material:
Battery Type:
Battery Life:
Modulation Frequencies:
Signal to Noise Ratio:
Audio Output:
Acoustic Output:
Add’l Compatible Receivers:
3-5/8" L x 2-3/8" W x 7/8" H (9.2 cm x 6 cm x 2.4 cm)
Gray, shatter-proof polypropylene
1.5V (AA) x 2, Alkaline (BAT 001) or Rechargeable AA Ni-Cad (BAT 026)
30 hours with BAT 001, 15 hours/charge with BAT 026, 25 mA, nom. current drain
95 kHz FM, 50 µS de-emphasis OR 250 kHz FM, 50 µS de-emphasis
60 dB with WIR TX8
Combination volume/On-Off knob, Push–button channel selector,
Switched Low-Cut tone control Lo: 20 Hz / Mid: 120 Hz / Hi: 700 Hz
3.5 mm mono mini phone jack, 35 mW maximum into 16 Ω
130 dB MAX SSPL90 with EAR 013
The RX5 Two-Channel Infrared Receiver can be used with a Neckloop TeleCoil Coupler
(NKL 001) to magnetically couple into a hearing aid that has a telephone pick-up coil.
WIR RX7: Single Channel Infrared Receiver, operates at 250 kHz
WIR RX8: Single Channel Infrared Receiver, operates at 95 kHz
WIR RX6: Stereo Infrared Receiver, operates at both 95 kHz or 250 kHz
CHG 200 Multi-Charger
SS-6 Tripod Stand Kit
RPK 005/RPK 006 Rack Panel Kits
Designed to store and charge one or two receivers simultaneously overnight. 110 VAC
Includes adjustable tripod stand, adaptor, mounting bracket, and hardware. Mounts
modulator and transmitter together or separately.
The RPK 005 mounts one modulator in one EIA rack space, the RPK 006 mounts two.
Includes all necessary hardware and easy-to-follow instructions.
SoundPlus® WIR TX800 Infrared System
Architect and Engineering Specifications
The infrared system shall consist of separate modulator and emitter units, with portable receivers. The modulator unit shall be
a half-rack style, metal enclosure. A rack panel shall be available to mount one or two modulator units within a single EIA
rack space. An adjustable floor stand and mounting bracket shall be available to mount the modulator and emitter together for portable operation.
The modulator shall provide FM carrier signals of both 95 kHz and 250 kHz. The carrier signals shall use 50 kHz deviation and
50 µS pre-emphasis. The carrier signals (baseband) shall be transmitted to one or more emitters by 50 Ω RG58 coaxial cable
with BNC-type connectors. A BNC–type baseband input jack and baseband output jack shall be provided on the modulator. The modulator shall be powered by an external 24 VAC, 10 VA, 50-60 Hz power supply, connected via a three-pin Molex
power connector.
The modulator shall be switchable to operate in either Discrete or Stereo Modes, using frequencies of 95 kHz and 250 kHz. It
shall have a rocker-type power switch, power LED indicator, two carrier indicator LEDs, and two bar graph-type LED audio
indicators. The modulator shall have a modulated IR LED on the front panel for testing purposes, and a headphone jack that
accommodates mono and stereo 1⁄4" headphones. The modulator shall have two rotary audio input level controls, a pushbutton switch to select soft limiting or variable slope input compression audio processing, a push-button switch to select
between Discrete and Stereo modes, and a push-button switch to select the signal sent to the phones jack. The modulator
shall have two timers that automatically shut off the carriers when there is no audio signal present for 30 minutes. The modulator shall have two combination input jacks that accept 3-pin XLR plugs for balanced microphone input or 1⁄4" TRS plugs for
balanced or unbalanced line-level inputs. The XLR inputs shall be low impedance, accept signal levels from 100 µV to 90 mV,
and supply 15 V simplex power per DIN45596. The TRS jacks shall accept balanced or unbalanced audio signal levels from 21
mV to 10 V. A 9-pin, Sub-D type female jack shall provide additional signal connections within the modulator circuitry. The
modulator shall carry a five year parts and labor warranty. The modulator shall be the Williams Sound Corp. Model MOD 112.
The emitter shall be contained in a metal enclosure with an unbreakable lens. The emitter shall include an omnidirectional
mounting bracket for permanent installation and a bracket shall be available for mounting on a floor stand for portable
installations. Each emitter shall be powered by a 24 VAC, 50 VA, 50-60 Hz power supply. The power connector shall be a 3-pin
Molex-type. The emitter shall have a BNC-type baseband input and a BNC-type baseband output jack. The emitter shall
have a repeater circuit to allow any number of emitters to operate from the baseband signal. The emitter shall have a visible LED indicator for power and for baseband signal. The emitter shall shut off when the baseband signal is not present. The
emitter shall provide an effective coverage area of 10,000 sq. ft. (930 sq. m.). The emitter shall be convection-cooled, without
fans. The coverage pattern shall be a 50° cone. The emitter shall carry a five-year warranty on parts and labor. The emitter
shall be a Williams Sound Corp. Model WIR TX8.
The receiver shall be a body-pack type with an IR detector lens on the face of the unit. The unit shall have a lanyard for
hands-free operation. The receiver shall have a rotary-type volume control. The receiver shall operate for 30 hours with two
AA alkaline batteries and for 15 hours per charge with Ni-Cad AA batteries. The receiver shall be charged without battery
removal via charger contacts in the case. A drop-in charger accessory shall recharge the batteries in 14 hours. The receiver
shall be housed in an impact resistant plastic case with a hinged battery door that does not separate from the receiver. The
receiver shall receive 95 kHz or 250 kHz modulated IR signals with 50 µS de-emphasis. The receiver shall have a 3.5 mm stereo
phone jack and accommodate low-impedance mono or stereo earphones, and headphones. The receiver shall accommodate Neckloop telecoil couplers. The receivers shall provide 130 dB maximum SPL output with an earbud-type earphone.
The system electrical frequency response shall be 25 Hz to 20 kHz, +1, -3 dB and the signal to noise ratio shall be 60 dB. The
receiver shall be covered by a five year parts and labor warranty, excluding earphones, headphones, batteries, and chargers. The receiver model shall be either the Williams Sound Corp. Model WIR RX5 or Model WIR RX8.
Your Authorized Williams Sound Dealer Is:
Williams Sound Corp.
10399 West 70th St., Eden Prairie, MN 55344-3459
U.S.A. 800-843-3544 / 612-943-2252 / FAX: 612-943-2174
© 1997, Williams Sound Corp.
CAT 070A
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