User manual

Page 7
10. Specifications
DC Power
DC input voltage 12 to 18 Volts DC
Current consumption 300mA
Audio Input
Impedance Terminated with approximately 8 Ohm load
Minimum input level 50 mV – 500mV
Maximum i/p audio 5 Watt
Audio output
Output load 2.5W 8ohm
Audio bandwidth 50 – 4.3KHz
Controls Power bypass/Function button
Indications Power ON/ FUNCTION
Connections 2.1mm DC power jack (Centre +ve)
3.5 mm mono plug lead 2m long
4mm binding posts
DSP noise cancelling
Number of levels 4 or 8 filter levels (selectable)
Indication Visual and audio indication of filter level
Noise reduction 9 – 35dB
Tone reduction 4 – 65 dB
Physical dimensions
Weight 1.65Kg
Dimensions 200(H) x 150(D) x 160(W)mm
11. Troubleshooting/FAQs
Speaker doesn’t work at all, no sound from the speaker:
• Check that the power connector on your power supply is suitable for the power
socket on the speaker (2.1mm, centre positive).
• Check that you have switched your radio communication equipment on and that you
have a signal for the speaker to process. To verify this, remove the audio connector
from the external speaker socket on your equipment.
• Check that the Desk Top “Noise Away” Power LED is on.
The speaker works but the noise cancellation doesn’t appear to improve the audio
quality of the signal:
• Check that the filter is switched on (green LED).
• Increase the filter level to see if this makes a difference.
• Increase the volume on the audio source.
4. Troubleshooting/FAQs
The volume from the speaker is low and cannot be increased:
• The speaker is designed to work with the external speaker sockets of radio
communications equipment, and although it will work with some earphone and
headphone sockets, there may be occasions where the signal output from these