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Example for the calculation number of speakers/impedance
Number of speakers
≙
≙
≙
≙
Impedance
1 speaker at 8
Ω
8
Ω
2 speakers at 8
Ω
each
4
Ω
(parallel)
2 speakers at 8
Ω
each
16
Ω
(in line)
3 speakers at 8
Ω
each
2.66
Ω
(parallel)
3 speakers at 8
Ω
each
24
Ω
(in line)
4 speakers at 8
Ω
each
2
Ω
(parallel)
The input impedance of the speaker systems should at least be the same or even higher than the output
impedance of the amplifier.
Information on choosing appropriate speaker
cables
• Speaker systems must only be connected via sufficiently dimensioned cables. Too thin cables lead to cable
heatup or enormous power loss and loss in sound quality.
• For all speaker systems up to 400 Watts, we recommend a cable diameter of 2.5 mm², for all other speaker
cables 4 mm².
• A high damping factor of your amplifier supplies a clear sound reproduction. Unnecessarily long and thin cables
will influence the damping factor and thus the low frequencies in a negative way. In order to safeguard good
sound quality, the damping factor should lie around 50. The longer a cable has to be, the thicker it should be. In
this respect, a damping factor of 200 will be reduced to 47 (8 ohms) when using a 10 m long, 2.5 mm² speaker
cable. The power loss at 8 ohms is 1.63 %, at 4 ohms 3.25 % and at 2 ohms even 6.5 %.
• The maximum cable length is 30 meters.
Line Output
For connection to units with line level (e.g. mixer, amplifier) the stereo RCA output [
AUX OUT
] can be used.
Microphones
Three unbalanced inputs are available for connecting dynamic microphones via a 6.3 mm plug at the inputs
[
MIC 1 INPUT
to
MIC 3 INPUT
]. Input [
MIC 1 INPUT
] features an adjustable priority function.
Units with Line Level
Three audio units with line level can be connected to the stereo RCA inputs [
AUX INPUT 1
to
AUX INPUT
3
].
Connection with the Mains
Finally connect the device to a mains outlet (230 V AC, 50 Hz ~) with the mains cable.
The occupation of the connection cables is as follows:
Cable
Pin
International
Brown
Live
L
Blue
Neutral
N
Yellow/Green Earth
The earth has to be connected! If the device will be directly connected with the local power supply network, a
disconnection switch with a minimum opening of 3 mm at every pole has to be included in the permanent electrical
installation. The device must only be connected with an electric installation carried out in compliance with the IEC
standards. The electric installation must be equipped with a Residual Current Device (RCD) with a maximum fault current
of 30 mA
