Connecting Outputs - powersoft Digam K20 User Manual

10

1.6 Connecting Outputs

Warning: there are lethal voltages at the loudspeaker connectors when the amplifier is turned on. To prevent any
damages turn the amplifier off before connecting the loudspeaker
Output connectors are made via neutrik speakon connectors. Consult the wire gauge chart to find a suitable wire gauge to
minimize power and damping factor losses in the speaker cables. The outputs can also work on bridge mode. For each
device the 1+ and 2+ pins of speakon connector are connected inside and have to be considered the positive output of the
channel; the 1- and 2- pins of speakon connector are connected inside and have to be considered the negative output of
the channel.
Note: Channel B is always polarity reversed output stage, but polarity compensated by feeding the minus pins of the
channel B output with the output voltage. Channel A is connected in the polarity mode. By having channel A and B
operating in opposite polarity, the energy storage in the power supply is more efficient. This is significant for signals below
100Hz (sub bass etc.) and improves the power bandwidth. Be sure to use balanced inputs on all measurement
equipment (also oscilloscope probes) in you are bench testing.
IN2 OUT2
LINK ON OFF
K3I and K2I model requires Phoenix Contacts GMSTB 2,5/ 2-ST connectors for output connections, the polarity is showed
in the figure below. In K3I stereo end bridge mode output follow wiring show on figure 1.6.1.
K3I - K2I
model only
OUT1 IN1
CH1
OUT
CH1
OUT
figure 1.6.1
figure 1.6.2
2+
+
1-
2-
_
1+
stereo mode
2+
1-
2-
1+
bridge mode
OUT (-) OUT (+)
2+
1-
2-
1+
CH2
OUT
2+
+
1-
_
2-
1+
CH2
OUT
Phoenix Contacts
GMSTB 2,5/ 2-ST
+
_