Williams Sound Stereo Amplifier WIRTX900 User Manual

SoundPlus® Infrared System • Model WIR TX900  
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Description:  
The WIR TX900 is a high performance, cost-effective infrared system designed for simultaneous lan-  
guage interpretation of up to four languages. Operating on 2.3-3.8 MHz, the WIR TX900 is less sus-  
ceptible to traditional radio and lighting interference. When using the optional RX22-4 four-chan-  
nel receiver, the WIR TX900 will operate up to 28,000 ft2 in single channel mode, ideal for auditori-  
ums, theaters or other large venues.  
Applications:  
• Simultaneous Interpretation • Audio Description • Conferences • Multi-Media Rooms • Boardrooms •  
Courtrooms • Schools • Universities • Cinema • Churches  
MOD 232 Modulator  
Size, Weight:  
Color:  
8.5" W x 8.2" D x 1.7" H (21.5 cm x 20.8 cm x 4.4 cm), 3.1 lbs (1.5 kg)  
Black epoxy paint with white legends  
Rack Mount:  
1/2 rack space wide, 1 rack space high, one or two modulators may be mounted in a  
single IEC rack space with RPK 005 (single) or RPK 006 (double) Rack Mount Kits  
Wall Transformer, 24 VAC, 50-60 Hz, 15 VA  
Power Supply:  
North America:  
Europe:  
UK:  
TFP 016, UL/CSA  
TFP 027-01, 2-pin Schuko plug, CE  
TFP 027-02, 3-pin UK plug, CE  
Modulation:  
Carrier Frequency:  
FM Wideband, +50kHz deviation, 50uS pre-emphasis  
Channel A: Selectable, 2.3/2.8/3.3/3.8 MHz,  
Channel B: Selectable, 2.3/2.8/3.3/3.8 MHz  
More than 60 dB  
30 to 16,000 Hz, +1 dB, -3 dB, electrical response  
Less than 2%, electrical response  
Compression (slope) adjustable from 1:1 to 4:1  
Switchable compression gain: Moderate: 16 dB. Max: 33 dB  
15 minute timer shuts off carrier when no audio is present (can be disabled)  
Two-position push button, ON/OFF  
Signal-to-Noise Ratio:  
Frequency Response:  
Total Harmonic Distortion:  
Audio Processing:  
Auto Carrier Shut-Off:  
Power Switch:  
Fig. 1: MOD 232 Front Panel  
Two Channel Infrared System Modulator  
Williams Sound  
Microprocessor Controlled  
Frequency Synthesized  
+9  
+9  
+6  
+3  
0
Inputs Mixed  
3.8  
3.8  
3.3  
2.8  
2.3  
+6  
+3  
0
5
5
Phones  
3.3  
2.8  
2.3  
4
6
4
6
Compress  
Compress  
7
8
9
7
8
9
Stereo  
IR  
3
3
2
1
- 3  
-6  
-9  
-12  
-15  
-18  
- 3  
-6  
2
Power  
-9  
CH A  
CH B  
1
-12  
-15  
-18  
Frequency  
(MHz)  
Frequency  
(MHz)  
0
10  
0
10  
Level  
Level  
Channel A  
Channel B  
Power Indicator:  
Green LED  
CHA and CHB Input Level, rotary knobs  
CHA and CHB Audio Level, 10-segment LED’s  
4 green LED carrier “on” indicators per channel (indicates frequency, malfunctions)  
1:1 to 4:1  
Audio Level Controls:  
Audio Indicators:  
Carrier LEDs:  
Compress Control:  
Input Mix LED:  
Stereo LED:  
Indicates inputs A and B audio are mixed and transmitted by CHA, CHB off  
Indicates stereo mode  
Phones Switch:  
Selects CH1 or CH2 for phones when not in stereo mode  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
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SoundPlus® Infrared System • Model WIR TX900  
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Fig. 3: WIR TX9 Rear Panel  
Multi-Channel Infrared Transmitter  
RoHS  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
WARNING: TO REDUCE THE RISK OF FIRE OR  
ELECTRIC SHOCK DO NOT EXPOSE THIS  
EQUIPMENT TO RAIN OR MOISTURE.  
Class  
LED Product  
1
Mounting  
Bracket  
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 50 Ohm Coaxial Cable (RG58)  
Baseband Signal Wiring:  
Use RG58 Coax,1000 ft. (350m) max. length  
Williams Sound Corp., Minneapolis, Minnesota, USA  
Patent Pending  
Made in U.S.A.  
Baseband  
(Modulation)  
NC 24 VAC  
Power In:  
Out  
Out  
In  
24VAC  
~
Plug  
50 Ohms  
50-60Hz  
35VA  
Power On  
Baseband On  
Fig. 4: Receiver Coverage Area with TX9 Emitter in Single Channel Mode  
90  
80  
Feet  
Receiver Coverage Area with TX9  
Transmitter in Single Channel Mode  
70  
60  
RX22-4 Receiver  
RX14-2 Receiver  
RX16 Receiver  
50  
40  
30  
20  
10  
RX16  
RX14-2  
RX22-4  
0
-10  
-20  
-30  
-40  
-50  
-60  
-70  
-80  
-90  
0
90 100 110 120 130 140 150 160  
10 20 30 40 50 60 70 80  
Feet  
The coverage area for the TX9 will vary depending on the receiver being used. The diagram above  
demonstrates the receiver coverage when operating a single TX9 emitter in single channel mode.  
Patterns are direct radiation patterns.  
Note: Reflections of the infrared light from walls, ceilings and floors may change these patterns.  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
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SoundPlus® Infrared System • Model WIR TX900  
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Fig. 5: 3-Dimension Foot Pattern  
The TX9 floods the listening audience with a  
cone shape light pattern as shown here.  
The path of the cone shape light leaves a  
pattern on the ground, or "foot print, " and  
indicates where the strongest receiver  
reception will occur.  
The actual coverage area will vary depending  
on the sensitivity of the receiver being used.  
Refer to Figures 4 and 7 to determine how  
many emitters are required for 100% coverage  
of the listening area.  
To determine the best location for the emitter, it helps to think of the IR emitter as an invisible flood-  
light. You’ll want to aim it so the listeners are “flooded” with the infrared light. The emitter should also  
be positioned high enough so it won’t be blocked by people and other physical obstructions. See Figure  
6 below. Mount the emitter at least 2 ft. (.61 m) above the audience. Position the emitter to face in a  
slightly downward angle, 20°, that will increase the “throw” of the infrared beam.  
Fig. 6: Vertical Beam Spread  
Minimum Receiver Range When Operating with a TX9 Emitter in Single Channel Mode  
RX22-4 Receiver:  
150' (45 m)  
RX14-2: 80' (24 m)  
RX16: 70' (21 m)  
(Range)  
TX9  
30'  
SCREEN  
STAGE  
6'  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
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SoundPlus® Infrared System • Model WIR TX900  
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Maximum Range When Using the RX22-4 Infrared Receiver  
Fig. 7: Horizontal and Vertical Radiation Polar Plots  
HORIZONTAL RADIATION POLAR PATTERNS  
VERTICAL RADIATION POLAR PATTERNS  
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR  
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR  
– 90  
– 80  
– 90  
– 80  
60  
60  
200  
200  
– 70  
– 70  
– 60  
– 60  
54  
48  
42  
36  
30  
24  
18  
12  
6
54  
48  
42  
36  
30  
24  
18  
12  
6
180  
160  
140  
120  
100  
80  
180  
160  
140  
120  
100  
80  
– 50  
– 50  
– 40  
– 40  
– 30  
– 30  
– 20  
– 20  
60  
60  
40  
40  
– 10  
– 10  
20  
20  
0
0
10  
10  
20  
20  
30  
30  
40  
40  
50  
50  
60  
60  
70  
70  
80  
80  
90  
90  
1 Channel, 1 nW/sq cm  
(Approx. 28000 sq ft, 2600 sq m)  
1 Channel, 1 nW/sq cm  
2 Channel, 1 nW/sq cm per channel  
(Approx. 18000 sq ft, 1700 sq m)  
2 Channels, 1 nW/sq cm per channel  
4 Channel, 1 nW/sq cm per channel  
(Approx. 11000 sq ft, 1000 sq m)  
4 Channels, 1 nW/sq cm per channel  
Reflections of the infrared light from walls, ceilings, and floors may change these patterns.  
Important: Remember to point the emitter towards the listening audience!  
If you’re not getting sufficient coverage with a single, properly installed TX9 Emitter, you may need  
to add additional WIR TX9 Emitters to achieve full coverage of your listening area. Figures 8a and  
8b illustrate how multiple emitters can be used for large room installations.  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
5
 
SoundPlus® Infrared System • Model WIR TX900  
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Multiple Emitters Installed to Maximize Coverage  
Fig. 8a: Overlapping Illumination Patterns to Cover Larger Listening Areas  
TX9  
TX9  
TX9  
TX9  
Fig. 8a above is a typical example of how multiple emitters are used to cover larger listening areas.  
Generally it is desirable for the illumination patterns to overlap. Note: The coverage area will vary depend-  
ing on the infrared receiver being used; refer to Figures 4 and 7 to determine how many emitters are  
required to achieve full coverage of a listening area.  
Fig. 8b: Overlapping Illumination Patterns to Cover Larger Listening Areas  
Coverage Area  
with Single Emitter  
TX9  
Coverage Area  
with Second Emitter  
TX9  
Added to Same  
Emission Point  
(50% increase)  
When two emitters are used at the same emission point in single channel mode, the overall coverage area incre-  
ses 50%. When using an RX22-4 receiver, as a result, the coverage area will increase to an estimated 42,000 ft2  
(3,902 m2); the RX14-2 will increase to 5,250 ft2 (488 m2); the RX16 will increase to 4,590 ft2 (426 m2 ).  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
6
 
SoundPlus® Infrared System • Model WIR TX900  
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WIR RX22-4 Receiver  
Receiver Style:  
Size:  
Weight:  
Body-Pack, dual-lens detector, lanyard  
4.5" L x 2.85" W x 1.2" H (114.3 mm x 72.4 mm x 30.4 mm)  
4.6 oz (130 g) with batteries  
Fig. 9: WIR RX22-4  
Receiver  
Color and Material:  
Lanyard:  
Operating Temperature:  
Battery Type:  
Battery Life:  
Battery Drain:  
Charging Contacts:  
Carrier Frequency:  
Black  
3 ft (.91 m), allows receiver to be worn around the neck  
-10° C to +50° C  
2 x AA, alkaline (BAT 001) or NiMH (BAT 026)  
Alkaline: 60 hours, NiMH: 30 hours/charge  
25 mA, nominal  
Channel  
Earphone  
Jack  
Selector Knob  
OFF  
For use only with CHG 3512  
"On"  
On/Off  
Channel 1: 2.3 MHz, Channel 2: 2.8 MHz  
Channel 3: 3.3 MHz, Channel 4: 3.8 MHz  
50 uS  
Indicator LED Volume Switch  
De-Emphasis:  
FM Deviation:  
RX22-4 Top  
50 kHz  
Signal-to-Noise Ratio:  
Squelch:  
Frequency Response:  
Total Harmonic Distortion:  
Controls:  
60dB min.  
Receiver squelches (mutes) at 40 dB S/N ratio  
25 Hz to 16 KHz, +1 dB, -3 dB, electrical response  
Less than 1%, electrical response  
ON/OFF/VOLUME: combination thumbwheel knob  
Channel Selector: four-position rotary switch  
Red LED “ON” indicator, flashes to indicate Low battery  
3.5 mm stereo mini phone jack  
Accepts 3.5 mm mono or stereo phone plug  
15 mW max at 32 Ω  
Indicators:  
Audio Output Jacks:  
Audio Output Power:  
Acoustic Output:  
Sensitivity:  
110 dB SSPL90 w/ EAR 013  
Better than 1 nW/cm2 for 40 dB signal-to-noise ratio  
CE, FCC, RoHS, WEEE  
Approvals:  
Warranty:  
5 years on receiver, 90 days on accessories  
Compatible Headphones/Earphones: Mono or stereo, 8-32 ohms, 3.5 mm mini phone plug, HED  
021, HED 026, EAR 013, EAR 014, EAR 022, NKL 001  
Compatible Headphones/Earphones: Mono or stereo, 8-32 Ω, 3.5 mm mini phone plug,  
HED 021, EAR 013, EAR 014, EAR 022  
RX22-4 Front  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
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SoundPlus® Infrared System • Model WIR TX900  
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Four-Channel System Diagram  
Fig. 10: Four-Channel System  
WIR TX9 Emitter (rear)  
WIR TX9 Emitter (rear)  
Multi-Channel Infrared Transmitter  
Multi-Channel Infrared Transmitter  
RoHS  
RoHS  
CAUTION  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
WARNING:TO REDUCE THE RISK OF FIRE OR  
ELECTRIC SHOCK DO NOT EXPOSE THIS  
EQUIPMENT TO RAIN OR MOISTURE.  
WARNING:TO REDUCE THE RISK OF FIRE OR  
ELECTRIC SHOCK DO NOT EXPOSE THIS  
EQUIPMENT TO RAIN OR MOISTURE.  
Class  
LED Product  
1
Class  
LED Product  
1
Mounting  
Bracket  
Mounting  
Bracket  
Note: It is normal for this unit to feel warm while it is in operation.  
Power Supply Wiring:  
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,  
Use NEC, Class  
2
Wiring, 18 ga. minimum,  
200 ft. (70m) maximum length (18 ga.)  
200 ft. (70m) maximum length (18 ga.)  
Baseband Signal Wiring:  
Use 50 Ohm Coaxial Cable (RG58)  
Baseband Signal Wiring:  
Use 50 Ohm Coaxial Cable (RG58)  
Baseband Signal Wiring:  
Use RG58 Coax,1000 ft. (350m) max. length  
Baseband Signal Wiring:  
Use RG58 Coax,1000 ft. (350m) max. length  
Williams Sound Corp., Minneapolis, Minnesota, USA  
Patent Pending  
Williams Sound Corp., Minneapolis, Minnesota, USA  
Patent Pending  
Made in U.S.A.  
Made in U.S.A.  
Baseband  
Baseband  
(Modulation)  
(Modulation)  
NC 24 VAC  
Power In:  
NC 24 VAC  
Power In:  
Out  
Out  
In  
Out  
Out  
In  
24VAC  
~
24VAC  
~
Plug  
Plug  
50 Ohms  
50 Ohms  
50-60Hz  
35VA  
50-60Hz  
35VA  
Power On  
Baseband On  
Power On  
Baseband On  
To Additional  
Emitters (if necessary)  
Baseband Signal  
MOD 232 Modulator (Rear)  
MOD 232 Modulator (Rear)  
Audio Line  
Output  
MOD 232 Infrared System Modulator  
Audio Line  
Output  
MOD 232 Infrared System Modulator  
Input CH  
A
Input CH  
B
Input CH  
A
Input CH  
B
Williams Sound  
Williams Sound  
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CH  
CH  
A
B
CH  
CH  
A
B
Baseband  
Baseband  
Input  
Output  
Output  
Input  
Output  
Output  
CH  
CH  
A
CH  
CH  
A
Power In  
Power In  
24 VAC, 15 VA, 50-60 Hz  
Plug  
24 VAC, 15 VA, 50-60 Hz  
Plug  
Configuration  
Configuration  
B
B
Switches  
Switches  
50 Ohms  
50 Ohms  
Made in USA  
100 Ohms  
Made in USA  
100 Ohms  
24V  
24V  
Baseband Signal  
CHA  
Audio In  
CHB  
Audio In  
CHA  
Audio In  
CHB  
Audio In  
WCA 068  
SOUND SYSTEM  
SOUND SYSTEM  
RX22-4 Receiver  
(wireless)  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
8
 
SoundPlus® Infrared System • Model WIR TX900  
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Bid Specs:  
Modulator, Model MOD 232  
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 two channels of selectable FM carrier signals; 2.3/2.8/3.3/3.8 MHz, so that a single modulator can  
be used to simultaneously transmit up to two channels, and two modulators can be ganged together to transmit up to four  
channels simultaneously. 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 ohm 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.  
It shall have a rocker-type power switch, power LED indicator, four 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, and channel monitoring switch. The modulator shall have two rotary  
audio input level controls, and a screwdriver adjustable control for varying the input compression from 1:1 to 4:1. The modu-  
lator shall have two timers that automatically shut off the carriers when there is no audio signal present for 15 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. The modulator shall have CE, FCC, RoHS, and WEEE  
approval and carry a five-year parts and labor warranty.  
The modulator shall be the Williams Sound Corp. model MOD 232.  
Emitter, Model TX9  
The emitter shall be contained in a metal enclosure with a shatter-resistant lens. The emitter shall include an omni-direction-  
al 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 50 ohm baseband input and a BNC-type baseband  
50 ohm output jack. The emitter shall have a repeater circuit to allow multiple numbers of emitters to operate from the  
baseband signal. The emitter shall have a visible LED indicator for power and for baseband signal. Carrier  
frequency is 50KHz to 8 MHz. The emitter shall shut off when the baseband signal is not present. The emitter shall provide  
an effective coverage area of 28,000 sq ft (2,600 sq m) in single channel mode and 18,000 sq ft (1,700 sq m) in two channel  
mode when using the RX22-4 receiver. The emitter shall be convection-cooled, without fans. The emitter shall have CE, FCC,  
RoHS, and WEEE approval and carry a five-year warranty on parts and labor.  
The emitter shall be Williams Sound Corp. model WIR TX9.  
Four-Channel Receiver, Model RX22-4  
The receiver shall be a body-pack type with IR detector lens behind 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 60 hours with  
two AA alkaline batteries and for 30 hours per charge with NiMH 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 8 hours  
when used with CHG 3512 charger. 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 2.3 MHz, 2.8 MHz, 3.3 MHz or 3.8 MHz modu-  
lated 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 110 dB SSPL90 output with EAR 013 earbud-type earphone.  
The system electrical frequency response shall be 25 Hz to 16 kHz, +1, -3 dB and the signal-to-noise ratio shall be 60 dB. The  
receiver shall have CE, FCC, RoHS, and WEEE approval. The receiver shall be covered by a five-year parts and labor warran-  
ty, excluding earphones, headphones, batteries and chargers.  
The receiver shall be the Williams Sound Corp. model WIR RX22-4.  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
9
 
SoundPlus® Infrared System • Model WIR TX900  
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Contact:  
United States  
Williams Sound Corp.  
10321 W. 70th Street  
Eden Prairie, MN 55344  
Phone: 800-328-6190 or 952-943-2252  
Fax: 952-943-2174  
Canada  
Thorvin Electronics  
2861 Sherwood Heights Dr. Units 36-37  
Oakville, ON L6J-7K1 Canada  
Phone: 800-323-6634 or 905-829-3040  
Fax: 905-829-4196  
United Kingdom  
Sound Associates  
Keeble House, 81 Island Farm Road  
West Molesey, Surrey KT 2SA  
United Kingdom  
Phone: (44) 020 8939 5900  
Fax: (44) 020 8939 5901  
Asia, Australia, Europe, Latin America, South America, South Africa  
International Sales Department  
Williams Sound Corp.  
10321 W. 70th Street  
Eden Prairie, MN 55344 USA  
Phone: +1 952 224 7791  
Fax: +1 952 943 2174  
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!  
©2006, Williams Sound Corp. CAT 089F  
10  
 

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