NU4 User Manual
Specifications
Power supply
12-18Vdc 500mA adaptor (supplied)
Batteries (transmitters)
8 x AA (2 per transmitter, included)
Carrier frequencies
Red 863.1, Green 864.8, Blue 864.3, Yellow 863.5 (in MHz)
Stability
10PPM
S/N ratio
>80dB
THD
<0.5% @ 1kHz
Image rejection
>85dB
Range
60m (max)
Output impedance
2.2kΩ
Output level
400mv (balanced), 200mv (unbalanced)
Connectors
DC in, 4 x XLRM, 6.3mm jack, 2 x BNC antenna
Dimensions: receiver
482 x 225 x 44mm (inc. rack ears)
Weight: receiver
3.0kg
Model
NU4-H
NU4-N
NU4-C
Dimensions: handheld transmitter
243 x 48mmØ
N/A
243 x 48mmØ
Weight: handheld transmitter
238g (no battery)
N/A
238g (no battery)
Dimensions: beltpack transmitter
N/A
205 x 68 x 25mm
205 x 68 x 25mm
Weight: beltpack transmitter
N/A
76g (no battery)
76g (no battery)
Dimensions: neckband microphone
N/A
180 x 140 x 60mm
180 x 140 x 60mm
Weight: neckband microphone
N/A
20g
20g
Dimensions: lavalier microphone
N/A
27 x 12mmØ
27 x 12mmØ
Weight: lavalier microphone
N/A
20g
20g
Troubleshooting
POWER button does not
light on receiver
Ensure power adapter is connected to mains and working properly
Ensure receiver is switched on
POWER button is lit but
no “RF” or “AF” LEDs
Ensure transmitter is switched on
Check that transmitter is not out of reception range
Check that transmitter batteries are good/charged
POWER button
and “RF”
LEDs are lit but no “AF”
and no sound
Check that transmitter is switched on
Ensure transmitter has good/charged batteries
Ensure there is no other nearby transmitter with the same frequency
All LEDs lit but no
sound from mic
Make sure the receiver is connected properly to the sound system
Ensure that receiver and amplifier/mixer channel volumes are turned up
Microphone output is
very loud or distorted
Turn down VOLUME on receiver
Turn down gain on beltpack transmitter
Reduce gain on mixer/amplifier
Ensure that the jack output is not fed to a mic input
Microphone output is
very low
Turn up VOLUME on receiver
Turn up gain on beltpack transmitter
Increase gain of mixer/amplifier input
Ensure that an XLR output is not fed to a line input
Check transmitter batteries
Disposal:
The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or
Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life.
The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted.
Copyright© 2018. AVSL Group Ltd.
