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AUX OUT
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The line output AUX OUT with terminal block connection is used for sending a signal, for example, to an
external amplifier, an active subwoofer or a system for telephone music on hold (terminal block
included). The MUSIC-MIX button can be used to transfer only the signal of the music channel (MUSIC
position) or the sum of all channels (MIX position) to the output.
Please note: In the factory setting, the EMERGENCY signal (emergency signal) is routed to the AUX OUT
line output via an internal jumper. If this setting is to be changed, the unit must be opened and the
corresponding jumper removed. Please refer to "JUMPER FOR EMERGENCY SIGNAL TO AUX OUT"
in this instruction manual.
SPEAKER OUTPUT
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The loudspeaker output with terminal block connection (terminal block included in the packaging)
enables to use both low-impedance loudspeakers with an impedance of at least 4 ohms (LO-Z/HI-Z
key in LO-Z position) and 70/100 V loudspeakers (LO-Z/HI-Z key in HI-Z position). Please note the correct
assignment of the terminal block poles (see illustration below). The tonal adjustment of the speaker
signal is done via the controls BASS (bass) and TREBLE (treble). The total output power of the connected
speakers should roughly correspond to the amplifier power.
STANDBY ON/OFF
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If the standby function is activated (STANDBY in position ON), the amplifier will automatically go into
standby mode if no audio signal is detected for 20 minutes. This reduces power consumption in a
sensible way. As soon as an audio signal is present, the amplifier is automatically booted up from
standby mode and is fully operational again within approx. 3 seconds (during booting, the standby LED
on the front panel flashes white). If the STANDBY LED lights up white continuously, the unit is ready
for operation. In standby mode, the LED lights up red. In addition, the IMA 120 or IMA 240 can also be
put into standby mode manually by pressing the standby button on the front panel. In this case, the
auto-standby mode is deactivated and the unit does not start up again automatically.
Please note: When the Auto Standby switch is active, the Bluetooth connection status is also
analysed. If a Bluetooth connection with a playback device (e.g. smartphone or tablet) is detected
and Bluetooth is selected as the signal source, the unit is not automatically set to standby mode.
Connections, operating and display elements of the two units IMA 120 and IMA 240 are identical
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