Attention:
Do not cover vents.
Check that there is no damage to the power cable before use
Do not position near heat sources, in direct sunlight or moisture and allow adequate ventilation and cooling space.
Power supply must be earthed properly
Ensure that the power supply is the correct voltage and capable of delivering adequate current safely.
If the amplifier enters PROTECT mode, switch off immediately and check all connections, only re-connect after the
problem is resolved or otherwise refer to a qualified service technician
Take care to avoid injury through contact with the high voltage 100V or 70V terminals
Choose EITHER 70V or 100V or 4-16
Ω output – DO NOT MIX THE OUTPUTS
Installation:
The A240TU is 2U 19
” rack-mountable and should be located in a safe, dry, well ventilated position.
Connect all inputs and speaker outputs prior to powering up.
The
“EMC” jack accepts a line input from an emergency alarm/announcement source and overrides all other
channels
Some microphones require phantom power to work, check and switch on the appropriate
“+48V” to the relevant XLR
Choose whether the system will operate at 4-16
Ω or 70V or 100V.
If not 70V or 100V, ensure that the overall impedance is no lower than 4 Ohms (note: 2 x 8
Ω parallel = 4Ω)
If 70V or 100V line, ensure that the total power tapped from all speakers does not exceed 90% total amplifier output
Connect all speakers in parallel to each other then lastly connect the amp in parallel
Connect the
“
-
“ (negative, cold) wire from the first speaker to “COM” (common connection)
If not 70V or 100V, connect the
“+” (positive, hot) wire from the first speaker to “4-16Ω”
For 70V line systems, connect the
“+” (positive, hot) wire from the first speaker to “70V”
For 100V line systems, connect the
“+” (positive, hot) wire from the first speaker to “100V”
Also for 100V line, it is possible to connect 5 separate circuits by connecting
“+” wire to CH1/CH2/CH3/CH4/CH5,
then connect
“-“ wires from all circuits to “COM” collectively.
Before switching on, turn all volume controls down and increase gradually after powering up.
Check each channel in turn, ensuring MASTER is turned up part way to check all inputs.
When the
“1dB” indicator illuminates persistently, the output is overloading and overall volume should be reduced
via the Master volume or the Mic or Aux channel volume controls
Test the chime button with the rear chime level control part way up
Turn up the
“MP3” level part way and insert a USB device containing appropriate media into the USB connector
Use the transport instructions below to navigate the USB media or alternatively, tune into FM radio
USB/FM Operation:
selects Play or Pause
selects previous track or station
selects next track or station
MP3/FM
switches between USB and FM tuner.