Nady Systems WA-125U Owner's manual - page 6
6
WA-125U OPERATING INSTRUCTIONS
11
Powering the WA-125U
AC POWER (12): Plug the AC adaptor to a wall outlet then insert the plug into the AC power adap-
tor input socket
(Note: Before connecting to AC power, make sure the working voltage of your WA-125U, either
115V AC or 230 V AC, as supplied and indicated on your unit (20) correctly matches your local AC
power.)
INTERNAL OR EXTERNAL DC POWER (16): The WA-125U may also be DC powered internally
with a 12V/1.2A rechargeable Gel-cell or using the optional external RB-120 (12-15V) DC power
supply plugged into the DC INPUT JACK (16)
(Note: To avoid damaging your unit’s power supply electronics, make sure that the DC input has the
correct polarity: positive center conductor and negative sleeve)
Attention: The DC INPUT JACK (16) will automatically switch between external DC or the
internal battery pack (8 X “D” cells). Inserting the external DC plug will automatically discon-
nect the internal DC power. This prevents damage to the internal batteries.
INTERNAL POWER (15): The WA-125U can also be powered by the internal (8 X “D” cells)
batteries.
(Note: Insert the batteries with correct polarity as marked. For longest operation, use only alkaline
batteries.) Replace the batteries when the output audio sounds muddy or distorted and has lower
volume or the range of the wireless shortens.
Operation
Before switching on the unit, make sure that the VOLUME CONTROLS (6) are off or at minimum
levels and that both of the TONE CONTROLS (7) are in the center and the ECHO (9) at minimum
position. This will prevent possible loud noises or damage to the speaker when the unit is turned on.
Switch the POWER ON/OFF (1) on the unit to ON. The POWER ON INDICATOR (4) will light red
to show that the system is on. The RF ON will light green to show the RF signal is received. After
the signal and/or the wireless mic are turned on, adjust the VOLUME (6), TONE (7) and ECHO (9)
levels as desired
The MIC INPUT (2) can be connected to a wired microphone or other such sound source. The au-
dio level in controlled by the MIC VOLUME (6). The AUX INPUT (2) can be connected to a cassette
or CD player or other such sound source. The audio level in controlled by
the AUX VOLUME (6). The REC OUT (8) can be connected to a recording
device input or to the input jack of a power amplifier to further amplify and
enlarge the audio power. The output is varied by the VOLUME CON-
TROLS (6).
The BASS and TREBLE CONTROLS (7) are used to decrease (turn left)
or increase (turn right) the frequency response for the final PA output.
They also help to reduce high or low frequency audio feedback during
operation.
The ECHO VOLUME (9) is used to adjust the sound effect to the PA system. The ECHO function is
only available when the MIC (wire mic) or MIC/TX (wireless mic) are used.
The RF MUTE (Squelch) TRIMPOT (18) can be used to eliminate RF interferences during wire-
less operation. This is most useful for making sure that when the PA is on the mic transmitter is
turned off there are no noises or radio interferences heard from the live PA, i.e. the audio is fully
muted. (Note: This control will not eliminate interference from other radio sources operating on the
DC+12V
MID
MIN
BUTTON TURNING DIRECTION
MAX
UB-4 BODYPACK MICROPHONE TRANSMITTER
Receiver Volume Controls Adjust
The PA sound output level is control by the volume control MIC/TX knob. If feedback (howling
sound) occurs, try first turning own the TREBLE CONTROL (7). If feedback still is present, try turn-
ing 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 (33) to the ON position. Adjust the volume of the receiver as outlined in the
Receiver Operating Instructions section: Operating the WA-125U.
Notes:
• Turning down the gain too much can compromise the signal-to-noise and it is not recommended.
• The microphone has an external flexible wire 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 acous-
tic feedback (howling or screeching) will be avoided.