Nady Systems WA-125U Owner's Manual

NADY SYSTEMS, INC.

6701 Shellmound Street • Emeryville, CA 94608

Tel: [phone] • Fax: [phone] • www.nady.com

SERVICE INFORMATION

(U.S.) If you are experiencing operation problem with your system, check out the support
page on the Nady website: www.nady.com for help and for contacting the Nady Service
Department. Should your wireless System require service, you must contact the Nady Service
Department at [phone] for a Return Authorization (R/A) Number and a service quote
(if out of warranty). Make sure the R/A Number is clearly marked on the outside of the pack­age. Cashier’s check or money is enclosed (If not prepaid with credit card), and ship the unit
prepaid to: Nady System Inc., Service Department, 6701 Shellmound Street, Emeryville, CA

94608. Include a brief description of the problem you are experiencing, for service of a unit
under warranty follow the instruction of your Warranty Card regarding Warranty Service.

(International) For service, please contact the NADY distributors in your country through the
dealer from whom you purchase this product.

DO NOT ATTEMPT TO SERVICE THIS UNIT YOURSELF, AS THAT WILL VOID YOUR

WARRANTY.

OWNE R’S MA NUAL

WA-125U

Single Channel UHF Wireless

Portable PA System

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SPECIFICATIONS

AMPLIFIER SPECIFICATIONS

Audio Output Power ......................................................................................................... 20W (MAX)

Speaker Load ........................................................................................4 Ohms (6-1/2 inch Speaker)

Supply Voltage ..................................................................External AC adaptor or DC (12-15V)/1.2A

Internal Power 8xD alkaline or 12V/1.2A rechargeable battery

Power Consumption .................................................................................................................40VAC

Connectors ..............................................AC/DC in, 1/4” (6.3 mm) unbalanced MIC/AUX/REC jacks

Input Sensitivity MIC, AUX .......................................................................................... 18mV, 132mV

REC output level ......................................................................................................................360mV

Frequency Response .......................................................................................50Hz to 20kHz +/-3dB

Total Harmonic Distortion ....................................................................................... <1% THD, normal

Signal-to-Noise Ratio (at rated output) ...................................................................................... -75dB

Tone Control Range ...............................................................+/-5dB (BASS 100Hz/TREBLE 10kHz)

Volume/Level Controls ...............................................................MICS, AUX, ECHO, BASS/TREBLE

9V battery Charger Current .............................................................................................. 5-70mA DC

Dimension ............................................................................ 8.3” x 10.6” x 5.4” (211 x 270 x 137mm)

Weight ...........................................................................................................................5.3lbs (2.4kg)

WIRELESS RECEIVER SPECIFICATIONS

Frequency Response ...........................................................................................100Hz-16kHz, -3dB

Harmonic Distortion ............................................................................................. <0.6% THD, normal

Signal-to-Noise Ratio (REC out) ............................................................................................... -80dB

RF Carrier Frequency........................................... ........ Single UHF Frequency (797-805MHz range)

Frequency stability ..............................................................................+/- 0.005% Crystal Controlled

Modulation ............................................................................................... FM (F3E), +/-20kHz normal

Unwanted Signal Rejection .......................................................................60dB image and spurious

Squelch Controls ..................................................... External adjustable (-65dBm/Min, -95dBm/Max)

LED Indicators ..................................................................................................RF ON (GREEN LED)

Antennas ............................................................................................4.0” (10.2 cm) Internal antenna

Operating Range ................................................. Up to 200 ft. typical (depending on site conditions)

Up to 300+ feet (optimum line-of-sight)

TRANSMITTER SPECIFICATIONS

Models Available .....................UH-4 Handheld, UB-4 Bodypack, and LINK 4 SNAP-ON transmitters

RF Output Power ................. +14dBm (25mW normal), +17dBm (50mW maximum allowed by FCC)

Harmonic/spurious .......................................................................................................-50dBc normal

Antenna Type .....................................................UH-4: Integral. UB-4: External permanent attached

LINK 4: Integral into hardwire Mic

Controls ................................................. Transmitter ON/Mute/OFF switch, Audio Input level control,

Phantom Power On/Off (LINK 4)

Audio Input Levels ....UH-4: 24mV. LINK 4: 24mV, UB-4: 225mV (Instr.), 310mV (HM), 75mV (Lav.)

Impedance ................................... UH-4: 3.3kΩ. LINK 4: 360Ω, UB-4: 500kΩ (Instr.), 2kΩ (HM/Lav.)

Connector .................................... UB-4: 3.5mm locking jack, LINK 4: XLR with 9V Phantom power

Indicator ................................................................................................Power and Low Battery LEDs

Battery Type ................................................................................ 9V alkaline or rechargeable battery

Battery Life ............................................................................................................8-10 Hours normal

Dimensions .............................................................. UH-4: 9.5” x 2.0” [L / Dia.] (24.13 cm x 5.08 cm)

UB-4: 2.5” x 4.25” x 1.0 [W / D / H] (6.35 cm x 10.80 cm x 2.45 cm)
LINK-4: 1.5” x 4.5” x 1.5” [W / D / H] (3.81 cm x 11.43 cm x 3.81 cm)

Weight (w/o batteries) .....................UH-4: 6.6 oz (187 g), UB-4: 3.1 oz (88 g), LINK 4: 2.6 oz (80 g)

TABL E OF CONTE NTS

INTRODUCTION ........................................................................................................... 2

USING THIS MANUAL .................................................................................................. 2

SYSTEM FEATURES ....................................................................................................3

WA-125U CONTROL AND CONNECTIONS ................................................................. 4

WA-125U OPERATING INSTRUCTIONS ..................................................................... 6

UH-4 HANDHELD MICROPHONE TRANSMITTER ..................................................... 8

UB-4 LAVALIER/HEADMIC BADYPACK TRANSMITTER .......................................... 10

LINK-4 PLUG-IN TRANSMITTER ............................................................................... 13

SPECIFICATIONS .......................................................................................................15

SERVICE INFORMATION ....................................................................... BACK COVER

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INT RODUCT ION

Thank you for purchasing a Nady WA-125U Wireless UHF Portable P.A. — and congratulations on
your choice. The WA-125U is the most compact of the popular line of Nady wireless P.A.’s. Ideal for
many applications, including use in classrooms, conference/meeting rooms, churches, health clubs
and small auditoriums, it is powerful, yet lightweight and easily portable. We are sure you will find
this versatile system a powerful and useful tool for your presentations.

USI NG THIS MA NUAL

This booklet gives instructions for the operation of the WA-125U wireless portable P.A., including
handheld, lavalier, and Headmic™ systems. Please read the instructions for your system com­pletely before operating this unit. This manual will first list the features of the WA-125U and then
will take you step by step to show you how to operate your new system. After reading the receiver
instructions, turn to the section of the booklet that covers the type of transmitter used with your new
system. Each section will give you detailed operating instructions. Also included in this manual are
system specifications and servicing information.

Specifications and design subject to change for improvement purposes without prior notice.

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SYSTE M F EATURES

WA-125U Receiver/Amplifier

• Powerful 20W audio output

• Operation in the wide-open, uncluttered upper UHF band (available on single frequencies in
range 797-805MHz) for optimum operating range and freedom from interference

• Built-in echo/reverb

• 1/4” unbalanced input jacks: 1 MIC, 1 AUX; one 1/4” unbalanced RECORD OUT; treble and bass
controls

• Wireless system features noise reduction companding circuitry for quietest operation with a wide
dynamic range.

• Available with choice of UH-4 or Link-4 handheld mic, UB-4 lavalier/headset mic transmitters

• External AC, DC (12-15V) or internal battery powered (8 X “D” alkaline or rechargeable batteries)

• Optional RB-120 (12-15V) internal rechargeable battery available

• Mountable with optional MST-4B aluminum tripod stand

• Internal charging ports for transmitter 9V (Ni-Cad or Ni-MH) rechargeable batteries

• Small and lightweight—only 8.3” x 10.6” x 5.4” (211 x 270 x 137mm) and 5.3 lbs. (2.4 Kg)

UH-4 Handheld Microphone Transmitter

• Nady DM-10D neodymium cartridge delivers transparent vocals, maximum feedback rejection and
minimal handling noise

• OFF/MUTE/ON switch for ease of use

• Unique screw-on battery compartment for quick pop-in battery replacement—uses standard 9V
alkaline battery

• Single LED indicator flashes once for unit on; lights steady for low battery alert

• Input level control for optimum sound adjustment

• Rugged ABS housing with integral antenna

UB-4 Bodypack Transmitter

• Compact bodypack with screw on jack for instrument or lavalier microphone input

• OFF/MUTE/ON switch for ease of use

• Unique sliding battery compartment for quick pop-in battery replacement–uses standard 9V
alkaline battery

• Single LED indicator flashes once for unit on; lights steady for low battery alert

• Input level control for optimum sound adjustment (LT/HM)

• Rugged ABS housing with external antenna

LINK 4™ Plug-In Transmitter

• Compact microphone transmitter that converts any dynamic XLR hardwired microphone to wire­less operation

• OFF/MUTE/ON switch for ease of use

• Unique sliding battery compartment for quick pop-in battery replacement–uses standard 9V alka­line battery

• Single LED indicator flashes once for unit on; lights steady for low battery alert

• Audio LO/MED/HI gain selection for optimum sound

• Selectable 9V DC phantom powering for lavalier condenser microphone operation

• Standard locking 3-pin connector with adjustable threaded ring to provide secure connection to
any XLR handheld direct or to lavalier microphone cable

• Lightweight, ABS housing with integral antenna

Level Trim Adjust

For optimum performance, an INPUT SELECT SWITCH (44) is provided. You could select the
switch to LO/MED or HI gain setting defending to your microphone use. Depending on the average
distance between vocalist’s mouth and microphone, you can adjust the level for your application.
Factory setting is MED for hardwire dynamic microphone. This is a setting to be used in most typi­cal close microphone applications. Set for maximum possible gain and headroom without notice­able distortion of the high level peaks. Experiment and set for maximum possible gain without
audible distortion on the high level peaks.

Receiver Volume Controls Adjust

The PA sound output level is control by the volume control MIC/TS knob. If feedback (howling
sound) occurs, try first turning own the TREBLE CONTROL (7). If feedback still is present, try turn­ing down the VOLUME (6) or repositioning the WA-125U with respect to the wired or wireless mic
being used.

The bodypack transmitter is now ready to use. The RF ON indicator on the receiver should now
be on, indicating a received signal from the transmitter. When ready to speak, slide the OFF/
STANDBY/ON SWITCH (42) to the ON position. Adjust the volume of the receiver as outlined in the
Receiver Operating Instructions section: Operating the WA-125U.

Notes:

• Selecting LOW gain setting can compromise the signal-to-noise and it is not recommended.

• The microphone ball on your hardwire microphone functions as an integral antenna. For proper
operation, it should not be cover or touch during operation.

• Observe care in selecting P.A. volume, transmitter location and speaker placement so that acous­tic feedback (howling or screeching) will be avoided.

LINK 4™ PLUG-IN TRANSMITTER

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