Williams Sound SoundPlus Value Courtroom System WIR SYS 2 User manual

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
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NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 1
Description:
The Value Courtroom System, model WIR SYS 2, is the ideal hearing assistance package for courtrooms with limited
budget resources. Participants wear headset style receivers to listen to the courtroom proceeding at the volume of
their comfort level anywhere in a 3,500 ft2area. For the severely hard of hearing, the RX22-4 receiver can be used with
aneckloop (included) to amplify the participant’s telecoil equipped hearing aid. SoundPlus infrared technology
ensures privacy and security: the message of the proceeding will not travel outside the walls of the courtroom.
Each WIR SYS 2 package includes: one (1) TX9 emitter, one (1) MOD 232 modulator, three (3) headset RX14-2 receivers,
one (1) RX22-4 receiver, one (1) HED 021 Headphone, one (1) NKL 001 neckloop and one (1) RPK 005 rack panel kit.
The WIR SYS 2 meets and exceeds government ADA regulations for public hearing assistance, and is backed by a five-
year warranty.*
Size, Weight: 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)
Color: 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
Power Supply: Wall Transformer, 24VAC, 50-60 Hz, 15VA
North America: TFP 016, UL/CSA
Europe: TFP 027-01, 2-pin Schuko plug, CE
UK: TFP 027-02, 3-pin UK plug, CE
Modulation: FM Wideband, +50kHz deviation, 50uS pre-emphasis
Carrier Frequency: Channel A: Selectable, 2.3/2.8/3.3/3.8 MHz,
Channel B: Selectable, 2.3/2.8/3.3/3.8 MHz
Signal-to-Noise Ratio: More than 60dB
Frequency Response: 30 to 16,000 Hz, +1 dB, -3 dB, electrical response
Total Harmonic Distortion: Less than 2%, electrical response
Audio Processing: Compression (slope) adjustable from 1:1 or 2:1
Switchable compression gain: Moderate: 16 dB. Max: 33 dB
Auto Carrier Shut-Off: 15-minute timer shuts off carrier when no audio is present (can be disabled)
MOD 232 Modulator:
Fig. 1: MOD 232 Front Panel
Power Switch: Two-position push button, ON/OFF
Power Indicator: Green LED
Audio Level Controls: CHA and CHB Input Level, rotary knobs
Audio Indicators: CHA and CHB Audio Level, 10-segment LED’s
Carrier LEDs: 4 green LED carrier “on” indicators per channel (indicates frequency, malfunctions)
Compress Control: 1:1 or 2:1
Input Mix LED: Indicates inputs A and B audio aremixed and transmitted by CHA, CHB off
Stereo LED: Indicates stereo mode
Phones Switch: Selects CH1 or CH2 for phones when not in stereo mode
Phones Output: 1/4" TRS headphone jack. Accepts stereo, mono, and any impedance phones.
Infrared Test LED: IR LED for receiver testing, monitoring, and audio signal testing.
ADA COURTROOM ASSISTIVE LISTENING SYSTEM
*90 days on accessories.

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
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NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 2
Dimensions, Weight: 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)
Color: Black with white legends, red acrylic lens
Power Supply: Wall Transformer,24 VAC, 50-60 Hz, 35 VA, 3-pin MOLEX Connector
North America: TFP 010, UL/CSA
Europe: TFP 027-01, 2-pin Schuko plug, CE
UK: TFP 027-02, 3-pin UK plug, CE
Note: Each WIR TX9 requires its own power supply
Power Cable: NEC Class 2 wiring, two-conductor, 18 ga, 200’ (61 m) max. length
Indicators: Green LED power indicator, red LED baseband indicator
Carrier Frequency: 50 kHz to 8 MHz
Emitter IR Power: 3.5 watts
Coverage Area: Up to 28,000 ft2(2,600 m2)in single-channel mode when using the RX22-4 Receiver
Up to 18,000 ft2(1,700 m2)in two-channel mode when using the RX22-4 Receiver
Up to 3,500 ft2(325 m2)in single-channel mode when using the RX14-2 Receiver
Up to 3,063 ft2(285 m2)in single-channel mode when using the RX18 Receiver
(See coverage area diagrams)
Baseband Input: BNC, 100 mV per carrier, 50 Ω,for use with WIR TX9 or MOD 232 only
Baseband Output: BNC, 50 Ω,for use with TX9 only
Baseband Cable: RG 58 Coax, BNC connectors, maximum 1000' (300 m) length
Operating Requirements: 0-50º C ambient temperature, non-condensing, non-corrosive atmosphere
Mounting Kits: Wall or Ceiling Mount: BKT 024 Omnidirectional mount, Mic Stand Kit: SS-11 or SS-6
Warranty: 5 years on Emitter, 90 days on accessories
Approvals: CE, FCC, RoHS, WEEE
Compatible Receivers: WIR RX22-4 Four-Channel Receiver,RX14-2 Two-Channel Receiver,
RX18 Two-Channel Receiver
Configuration
Switches
Input CH A Input CH B
Audio Line
Output
CH A
CH A
CH B
CH B
50 Ohms
100 Ohms Made in USA
24V
24 VAC, 15 VA, 50-60 Hz
Power In
Baseband


Input

Output

Output
MOD 232 Infrared System Modulator
Plug
Williams Sound
12345678
12345678
Fig. 2: MOD 232 Rear Panel
Power Input: 3-Pin Molex, 24 VAC, 50-60 Hz, 15 VA
Audio Input Jack: CHA and CHB combination XLR/TRS jack
Mic Level: Balanced, Lo-Z, 100 µV min. to 90 mV max., 1mV nominal, 3 kΩinput impedance, sup-
plies switchable simplex power per DIN 45596 for condenser mics
Line Level: Balanced or unbalanced, 21 mV min. to 10 V max., 212 mV nominal, 100 kΩ
Audio Line Output Jacks: RCA Jack, CHA and CHB, 500 mV, unbalanced, 100 Ωsource impedance, load imped-
ance must be greater than 1kΩ
Configuration Switches: CHA and CHB 8-position DIP switch, selects Mic/Line input, compressor gain, simplex
power, discrete or mixed inputs, carrier frequency, channel disable, auto shut-off
timer
Baseband Input Jack: BNC, allows mixing with additional MOD 232 Modulator (4CH operation), 100mV, 50Ω
input impedance, use with MOD 232, BNC, RG-58 Cable
Baseband Output Jack: Two BNC jacks carry baseband signal, 100 mV/channel, 50 Ωsource impedance, for use
with WIR TX9 or MOD 232 only
Approvals: CE, FCC, RoHS, WEEE
Operating Requirements: 0-50º C ambient temperature, non-condensing, non-corrosive atmosphere
Warranty: 5 years on modulator, 90 days on accessories
WIR TX9 Emitter:

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
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NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 3
Power On Baseband On
Multi-Channel Infrared Transmitter
Made in U.S.A.
24 VACNC
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO REDUCETHE RISK OF FIREOR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power In:
24VAC
50-60Hz
35VA
Power Supply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is normal for this unit to feel warm while it is in operation.
Plug
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Use 50 Ohm Coaxial Cable (RG58)
Use RG58 Coax,1000 ft. (350m) max. length
www.williamssound.com
InOut Out
50 Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RoHS
Class 1
LED Product
Williams Sound Corp., Minneapolis, Minnesota, USA
Patent Pending
Fig. 3: WIR TX9 Rear Panel
90
Feet
Feet
90 100 110 120 130 140 150 160
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
RX22-4 Receiver
Receiver Coverage Area with TX9
Transmitter in Single Channel Mode
RX18 Receiver
RX14-2 Receiver
Fig. 4: Receiver Coverage Area with TX9 Emitter in Single Channel Mode
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.
RX22-4
RX14-2
RX18

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
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NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 4
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.
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) RX18: 70' (21 m)
SCREEN
30'
STAGE
6'
Center Of Emitter Beam
TX9
(Range)
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
6below.Mount the emitter at least 2 ft. (.61 m) above the audience. Position the emitter to face in a
slightly downwardangle, 20°, that will increase the “throw” of the infrared beam.
Fig. 5: 3-Dimension Foot Pattern
Fig. 6: Vertical Beam Spread

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
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NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
Maximum Range When Using the RX22-4 Infrared Receiver
20
6
12
18
24
30
36
42
48
54
60
40
60
80
100
120
140
160
180
200
FEET
METERS
–90 –80
–70
–60
–50
–40
–30
–20
–10
0
10
20
30
40
50
60
70
80
90
1 Channel, 1 nW/sq cm
(Approx. 28000 sq ft, 2600 sq m)
2 Channel, 1 nW/sq cm per channel
(Approx. 18000 sq ft, 1700 sq m)
4 Channel, 1 nW/sq cm per channel
(Approx. 11000 sq ft, 1000 sq m)
1 Channel, 1 nW/sq cm
2 Channels, 1 nW/sq cm per channel
4 Channels, 1 nW/sq cm per channel
HORIZONTAL RADIATION POLAR PATTERNS
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR
VERTICAL RADIATION POLAR PATTERNS
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR
20
6
12
18
24
30
36
42
48
54
60
40
60
80
100
120
140
160
180
200
FEET
METERS
–90 –80
–70
–60
–50
–40
–30
–20
–10
0
10
20
30
40
50
60
70
80
90
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.
Fig. 7: Horizontal and Vertical Radiation Polar Plots
©2010, Williams Sound Corp. MCAT 028E 5

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
U
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 6
TX9 TX9
TX9 TX9
TX9
Coverage Area
with Single Emitter
Coverage Area
with Second Emitter
Added to Same
Emission Point
(50% increase)
TX9
Fig. 8a: Overlapping Illumination Patterns to Cover Larger Listening Areas
Multiple Emitters Installed to Maximize Coverage
Fig. 8b: Overlapping Illumination Patterns to Cover Larger Listening Areas
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 varydepend-
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.
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 RX18 will increase to 4,590 ft2(426 m2).

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
U
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
Receiver Style: Body-Pack, dual-lens detector, lanyard
Size: 4.5" L x 2.85" W x 1.2" H (114.3 mm x 72.4 mm x
30.4 mm)
Weight: 4.6 oz (130 g) with batteries
Color and Material: Black
Lanyard: 3 ft (.91 m), allows receiver to be worn around the neck
Operating Temperature: -10° C to +50° C
Battery Type: 2 x AA, alkaline (BAT 001) or NiMH (BAT 026)
Battery Life: Alkaline: 60 hours, NiMH: 30 hours/charge
Battery Drain: 25 mA, nominal
Charging Contacts: For use only with CHG 3512
Carrier Frequency: Channel 1: 2.3 MHz, Channel 2: 2.8 MHz
Channel 3: 3.3 MHz, Channel 4: 3.8 MHz
De-Emphasis: 50 uS
FM Deviation: ±50 kHz
Signal-to-Noise Ratio: 60dB min.
Squelch: Receiver squelches (mutes) at 40 dB S/N ratio
Frequency Response: 25 Hz to 16 KHz, +1 dB, -3 dB, electrical response
Total Harmonic Distortion: Less than 1%, electrical response
Controls: ON/OFF/VOLUME: combination thumbwheel knob
Channel Selector: four-position rotaryswitch
Indicators: Red LED “ON” indicator, flashes to indicate Low battery
Audio Output Jacks: 3.5 mm stereo mini phone jack
Accepts 3.5 mm mono or stereo phone plug
Audio Output Power: 15 mW max at 32 Ω
Acoustic Output: 110 dB SSPL90 w/ EAR 013
Sensitivity: Better than 1 nW/cm2for 40 dB signal-to-noise ratio
Approvals: CE, FCC, RoHS, WEEE
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
RX22-4 Front
RX22-4 Top
On/Off
Volume Switch
Earphone
Jack
"On"
Indicator LED
Channel
Selector Knob
OFF
WIR RX22-4 Receiver:
©2010, Williams Sound Corp. MCAT 028E 7
Fig. 9: WIR RX22-4 Receiver

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
U
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 8
Receiver Style: Headset
Earpad Size: 2.5" (6.5 cm) diameter, adjustable headband
Weight: 6.7 oz (191 g) without batteries
Color and Material: Black, plastic
Operating Range: Up to 3,500 ft2(325 m2)when using a single WIR TX9 Emitter
Battery Type: AAA Alkaline batteries (BAT 010). AAA NiMH (BAT 022) optional
Battery Life: Alkaline: 50 hours, NiMH: 8 hours/charge
Battery Drain: 25 mA, nominal
Controls: ON/OFF switch
(2) Thumbwheel volume control knob, left and right
(1) Frequency push-button selector, 2.3 MHz or 2.8 MHz
Frequency Response: 50 Hz – 12 kHz
Signal-to-Noise Ratio: 58 dB (IEC weighted)
Deviation: FM wideband modulation
Acoustic Output: 118 dB MAX SSPL90, +/- 1 dB with 6 cc coupler
Approvals: CE, RoHS, WEEE
Warranty: 1-year warranty (excludes physical damage)
WIR RX14-2 Receiver:
|
|
|
|
|
| |
|
|
|
|
OFF
ON
Volume
On/Off
Infrared “Eye”
AAA
Battery
Compartment
+–
Right Earphone
|
|
|
|
|
| |
|
|
|
|
Frequency
Selector: 2.3 MHz
or 2.8 MHz
Infrared “Eye”
Volume
Left Earphone
+–
AAA
Battery
Compartment
Fig. 10 WIR RX14-2 Side View

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
U
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2010, Williams Sound Corp. MCAT 028E 9
CHA
Audio In CHB
Audio In
SOUND SYSTEM
To Additional
Emitters (if necessary)
MOD 232 Modulator (Rear)
WIR TX9 Emitter (rear)
Configuration
Switches
Input CH A Input CH B
Audio Line
Output
CH A
CH A
CH B
CH B
50 Ohms
100 Ohms Made in USA
24V
24VAC, 15 VA, 50-60 Hz
Power In
Baseband
OutputOutputInput
MOD 232 Infrared System Modulator
Plug
Williams Sound
12345678
12345678
Pow erOn Baseba ndOn
Multi-Channel Infrared Tra nsmitter
Madein U.S .A.
24VACNC
CAUTION
RISK OF ELECTRIC SHO CK
DO NO T OPEN
WAR NING: TO REDUCETHE RISK OF FIRE OR
ELECTRIC SHOCK DO NO T EXPOSE THIS
EQUIPMENT TORAIN OR MOISTURE.
Pow er In:
24VA C
50-60Hz
35VA
Pow erSupply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is nor mal for this unit to feel w armwhile it is in oper ation.
Plug
UseNEC, C lass 2 Wiring, 18 ga. minim um,
200ft. (70m) maxim um length (18 ga.)
Use 50 Ohm Coaxial Cab le (RG58)
UseRG58 Coax,1000 ft. (350m) max. length
www.williamssound.co m
InOut Out
50Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RX22-4 Receiver
(wireless)
Baseband Signal
RoHS
Class 1
LED Product
WilliamsSound Cor p .,Minneapolis, Minnes ota,USA
Pat entPending
Two-Channel System Diagram
Fig. 11: Two-Channel System

SoundPlus®
Value Courtroom System • Model WIR SYS 2
SoundPlus® Value Courtroom System • Model WIR SYS 2
D
D
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NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
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 head-
phone 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 or 2:1 . The modulator 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 bal-
anced 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-direc-
tional 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 base-
band 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 offwhen the baseband signal is not present. The emitter shall provide an effective cov-
erage area of up to 28,000 sq ft (2,600 sq m) in single channel mode and up to 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.
WIR RX14-2 Receiver
The receiver shall be a headset style with IR detectors positioned on top of each individual earphone. The receiver
shall operate on 2.3 MHz or 2.8 MHz frequency.The receiver shall have an individual rotary-type volume control on
each individual earphone and a on/off selection switch on the right earphone. The receiver shall have a push button
frequency selector to choose between 2.3 MHz or 2.8 MHz operation. The receiver shall provide 118 dB SSPL90 out-
put, +/- 1 dB, and a signal-to-noise ratio of 58 dB. The receiver shall operate up to 50 hours when using AAA alka-
line non-rechargeable batteries and 8 hours per charge when using AAA NiMH rechargeable batteries. The receiver
shall be encased in a black, plastic case. The receiver shall operate up to 3,500 ft2(325 m2)when using a single WIR
TX9 Emitter. The receiver shall have CE, RoHS, and WEEE approval and be covered by a one-year parts and labor war-
ranty,not including batteries or accessories.
The receiver shall be the Williams Sound Corp. model WIR RX14-2.
©2010, Williams Sound Corp. MCAT 028E 10