Operation Manual

Connection and getting started 15
1.
Unbalanced input: This is the standard input for all common analog sources in the consumer
electronics field. Here you can connect the source by means of the RCA cable (“B”, see
chapter 12) which is part of the accessory kit.
2.
Balanced input: To this input you can connect sources which provide balanced outputs, such
as HighEnd CD players or professional mixing consoles. The input provides a combo-jack
(XLR jack and 6.3 mm TRS jack).
Signals which are applied to the balanced input are mixed together with signals which are
applied to the unbalanced input (1.).
3.
Digital input, compliant to AES/EBU standard: This input can work with signals according to
the AES/EBU standard which is currently used in the professional studio technique.
The digital data stream contains both stereo signals (left and right). By means of the switch
“6” the channel which should be reproduced has to be selected.
The three digital inputs (3, 4 and 5) have different priorities. Is a valid data stream applied to
the digital inputs, the audio data of input 3 are primarily processed.
4. and 5.
Digital inputs and parallel outputs, compliant to S/PDIF standard: These inputs can work with
signals according to the S/PDIF standard (optically = TOSLINK and coaxially), which is used
by most devices in the consumer electronics field.
The digital data stream contains both stereo signals (left and right). By means of the switch
“6” the channel which should be reproduced has to be selected.
6.
Channel selector switch for the digital inputs (3, 4 and 5): If you would like to drive the pow-
ered speaker with a digital signal source, you have to select the reproduced audio channel by
means of the channel selector switch. In a stereo system you should make sure to select the
appropriate channel at each speaker.
7.
Selector switch for analogue or digital input: By means of this switch, you select if the pow-
ered speaker reproduces the signal provided by the source which is connected to the ana-
logue input or the digital input.
Remark: If this switch is not switched to the appropriate position, you will not hear any sound!
8.
Master Volume control: By means of this control you can adjust the reproduced volume. In a
stereo setup you have to make sure that the controls of both AM 180 are adjusted to the
same level. Otherwise you will gain an unbalance between the two channels.