Nady Systems Stereo Amplifier WA 1620U User Manual

SERVICE FOR YOUR NADY AUDIO PRODUCT  
(U.S.) Should your WA-1620U product require service, please contact the Nady Service Department  
via telephone at (510) 652-2411, or e-mail at [email protected].  
WA-1620U  
32 Channel UHF Portable Wireless Amplifier  
(International) For service, please contact the NADY SYSTEMS distributor in your country through  
the dealer from whom you purchased this product.  
DO NOT ATTEMPT TO SERVICE THIS UNIT  
YOURSELF AS IT CAN BE DANGEROUS AND  
WILL ALSO VOID THE WARRANTY.  
NADY SYSTEMS, INC. • 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608  
Tel: 510.652.2411 • Fax: 510.652.5075 • www.nady.com  
USER MANUAL  
 
CONTROLS FOR THE WA-1620U RECEIVER/AMPLIFIER  
CONTROLS FOR THE WH-16U HANDHELD MICROPHONE  
(2)  
(3)  
(27) Microphone Power Switch  
(28)  
(29)  
(27)  
(28) Microphone Power Indicator  
(29) Microphone Infrared Wire Interface  
(30) Antenna  
(31) Bracket Connection  
(32) Mic Stand Clip  
(4)  
(9)  
(1)  
BATTERY INSTALLATION  
• Remove the aluminum battery cover at the transmitter’s  
base by rotating the locking rotary counter-clockwise  
• Insert the batteries, taking care to observe proper polarities.  
• Replace the cover and rotate clockwise into locked position  
(10)  
(11)  
(5)  
(6)  
(7)  
(8)  
(30)  
BACK  
(17)  
FRONT FACE  
(31)  
(32)  
(16)  
(18)  
(1) Power Switch  
(2) Main Volume Control  
(14)  
(12)  
(3) LCD Interface  
(4 ) Infrared Wire Interface of the Receiver  
(5) Tone Control  
OPERATING THE WH-16U HANDHELD MICROPHONE  
(6) Auxiliary Input Volume  
(15) RX  
(7) Auxiliary Input Jack  
• Press the Transmitter Switch (27) to "ON". The Indicator (20) will light for about two seconds  
indicating useable battery strength for operation and then shut off.  
(8) Auxiliary Output Jack  
(9) LCD Function Setup Key  
(10) Fasteners of Power Cord Compartment  
(11) Power Cord Compartment  
(12) Channel Display  
(13)  
NOTE: If the Power Indicator (28) doesn’t light momentarily when first turning on the unit or flashes  
during use, please change the batteries. If it lights all the time, please re-adjust the channel again.  
To avoid feedback whistling or howling, keep the mic behind the receiver’s speaker and at least 5-  
10 feet away. Adjust positions and volume as needed to eliminate feedback interference.  
(15) TX  
LCD INTERFACE  
(13) Audio Level (AF) Display  
(14) Signal Strength (RF) Display  
(15) Battery Status Display (RX-TX)  
(16) Auto-Search Open Channel Indicator  
(17) RX-TX Infrared Link Indicator  
(18) Manual Channel Select Indicator  
6
3
 
OPERATING THE WA-1620U RECEIVER/AMPLIFIER  
CONTROLS FOR THE WL-16U BODYPACK TRANSMITTER  
(25)  
(20)  
• Press the Power Switch (1) to turn on the receiver.  
• The LCD display will display the channel and battery status.  
(19) Power Switch  
(20) Power Indicator  
• Adjust the Volume Switch (2) for the level desired.  
(19)  
(21)  
NOTE: If the LCD display doesn’t display the unit’s battery is low. Please charge first before using,  
after turning the unit off with the power switch (1). The WA-1620U will automatically shut off when  
power is too low for operation and must be recharged before further usage. The unit can also be  
used with the AC power, and such operation will also charge the battery simultaneously while using.  
If the unit is amplifying continuous high audio levels then the internal AC adapter may not provide  
enough power for full operation and you’ll need to let battery charge for a while to build up a power  
reserve before using again with AC.  
(21) Infrared Wire Interface of the Transmitter  
(22) Volume Control  
(22)  
(23)  
(23) Volume Lock  
(24) Strap Clip  
(25) Lavaliere Microphone Jack  
(24)  
Adjusting Frequency Channel  
BATTERY INSTALLATION  
• Press the Battery Cover (26) outward as indicated by  
the embossed arrow to pop open the battery  
compartment  
Auto-Searching For Open Channels  
Continuously press the button labeled "OK" for 3 seconds. "  
screen. Release pressing "OK". The WA-1620U receiver will go into Auto-Searching Status. The  
buzzer will sound continuously when the receiver has found an open channel.  
" will appear and flash on the  
• Insert the batteries. (Pay attention to the correct  
polarity.) Close and slide the battery cover back to the  
locked position  
Changing the Transmitter Channel Automatically  
After the receiver’s channel has been selected above, and the receiver is still buzzing, hold the  
Infrared Wireless Interface (20 & 29) of the transmitter (body pack or handheld mic) several inches  
from the Infrared Wireless Interface (4) of the receiver. Turn on the switch (19 or 27) of the body  
pack or handheld transmitter and wait a few seconds for the receiver buzzing to stop, which signals  
the successful programming of the channel selected on the receiver into the transmitter.  
NOTE: Please avoid doing the above in bright sunlight as it may effect the infra-red data transfer.  
(26)  
OPERATING THE WL-16U BODYPACK TRANSMITTER  
Selecting the Receiver’s Operating Channel Manually  
• Insert the Lavaliere Microphone into the transmitter’s microphone jack (25)  
• Press the Transmitter Switch (19) to "ON". The Indicator (20) will light for about two seconds  
indicating useable battery strength for operation and then shut off.  
• Space the microphone about 6-12 inches from the mouth for best sound.  
To adjust the transmitted volume level for best audio, press the Volume Lock switch (23) on the  
side of the transmitter to "H or L", and then the Volume Adjusting Rotary control (22) can be  
• Press "  
• Select Manual Channel Select mode "  
• Press "OK" to select the channel displayed. It will change every time "OK" is pressed  
• Select the Infrared Link mode " " by using " " " " and press "OK," the buzzer will sound  
" for three seconds to enter into the function setup mode  
" by using and " " "  
"
continuously. Proceed to transfer this channel info to the wireless microphone or the body pack  
transmitter as above.  
adjusted for optimum audio. If the sound is distorted, either move the mic farther from the mouth  
or turn down this control (22) to lower the audio level input to the transmitter.  
Operating with Auxiliary Equipment  
Operating the Audio Input  
• Insert the audio input, such as from a wired microphone, Walkman or CD player into the  
Auxiliary Input (7)  
• Adjust the Auxiliary Volume Control (6) of the Auxiliary Input  
NOTE: If the Power Indicator (20) doesn’t light momentarily when first turning on the unit or flashes  
during use, please change the batteries. If it lights all the time, please re-adjust the channel again.  
When the power switch is on "ST," then the receiver will be on mute status, and the system will be  
quiet and operating without sound. To avoid feedback whistling or howling, keep the mic behind the  
receiver’s speaker and at least 5-10 feet away. Adjust positions and volume as needed to eliminate  
feedback interference.  
Operating the Audio Output  
• Auxiliary Output (8) is the output jack of the audio signal and can be connected with amplifying  
and recording equipment  
NOTE: The Main Volume Rotary control (2) should be used to adjust the audio output volume  
Methods for Increasing the Audio Volume  
• A single wireless microphone can be used simultaneously with any number of receivers on the  
same frequency for added amplification of the volume in a given location.  
• Higher power audio amplifiers can also be connected to the Output (8) for increased loudness.  
5
4
 

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