ASR Audiosystems Friedrich Schaefer, D-35727 Herborn, Germany
High End Integrated Amplifier ASR Emitter Page 16
Adjusting the configuration of the ASR Emitter
The ASR Emitter is equipped with internal DIP switches to configurate the unit. Factory
setting depends on the features of the individual unit. If you want to re-configurate your
ASR Emitter individually with these DIP switches, please contact your authorized ASR
Audiosystems dealer.
4.0 Protection circuits of the ASR Emitter
Every ASR Emitter is equipped with several protection circuits to avoid any damage on the
unit itself and on your loudspeakers. Trouble during operation will be indicated by a
flashing red LED „Störung“. The ASR Emitter and the voltage supply is switched off, if the
protection circuits detect over-temperature, short circuit and/or repeated overloads during
operation. If the protection circuits switch the ASR Emitter off, put the left knob to the „Off“-
position and press the round „Status“-button on the remote control to cancel the „On“-lock.
4.1 Impedance-check before the ASR Emitter is switched on
If your ASR Emitter is equipped with more than one pair of speaker output-terminals
and/or a headphone output, the direct current (DC) impedance of the connected
loudspeakers is checked by an automatic circuit during the countdown from „99“ to „11“,
when the ASR Emitter is switched on. If the left knob is put to the „Standby“-position, this
check will be performed, too. The ASR Emitter will not be switched on and the red LED
„Kurzschluß“ will be flashing, if the measured impedance is smaller than 1,5 ohms. If this
occurs, the speakercables have to be detached from the ASR Emitter. If the red LED is still
flashing, please contact your authorized ASR Audiosystems dealer.
4.2 Distortion- and Overload-protection circuit
This protection switches the ASR Emitter off in case of overload. Overload means, that the
required output voltage is higher than the operational voltage of the amplifier. Distortion
increases and represents a danger for the midrange- and treble drivers of the connected
loudspeakers.
The protection circuits of the ASR Emitter detect distortion effectivly. As soon as the
protection circuits detect distortion, the distorted channel of the ASR Emitter is switched off
– the display indicates the switch off with two flashing LEDs (red) „Overload“ and „Offset“.
These two LEDs are flashing, too, if the (loudspeaker-)output(s) are not free of direct
current (DC).
4.3 Over-temperature protection circuit
The ASR Emitter is equipped with a sensitive over-temperature protection circuit.
Temperature sensors are located at the large heatsinks of the ASR Emitter. If this sensors
detect a temperature > 110° F, the ASR Emitter will be switched off. The display indicates
the switch off with a flashing LED (red) „Übertemp“. Please put the left knob on the ASR
Emitter´s frontplate to the „Off/0“-postion. After the the amplifier is cooled off you can
switch the amplifier on again.
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