powersoft X4 - Output Connections

Audio connections | 13
12 : 2.Output connections
CLASS 3 WIRING
Output terminals are hazardous: wiring connection
to these terminals require installation by an instruct-
ed person and the use of ready made leads.
Take care to secure the output terminal before switching
the device on.
To avoid electrical shock, do not touch any exposed
speaker wiring while the amplier is operating.
X8. The X8 amplier platform provides four Neutrik
NL4MD speakON output connectors (one per channel pair).
X4. The X4 amplier platform provides two Neutrik
NL4MD speakON output connectors (one per channel pair).
Single-ended and bridge-tied loudspeakers connection
are supported as shown in FIGURE 22.
For more details about the signal polarity, refer to
Chapter 12 : 3.Internal signal path polarity.
12 : 3.Internal signal path polarity
In order to increase the power’s supply energy storage
efciency, signals coming from each channel pairs are po-
larity reversed, one with respect to the other within the pair,
when entering the amplier. This ensures a symmetrical use
of the voltage rails: if, for example, both channels’ 1 and 2
input signals are going through a peak at the same time,
channel 1’s energy will come from the positive voltage rails
while channel 2, whose polarity is reversed with respect to
channel 1, will be fed energy from the negative voltage rails.
In this manner, the power supply will work symmetrically,
with one channel catered by the positive rails and the other
by the symmetrical negative rails. Channel 2’s signal will be
polarity reversed once more at the output connectors to
ensure that both channels output with the same polarity as
their corresponding input signals.
FIGURE 20: X8 Loudspeaker connectors.
FIGURE 21: X4 Loudspeaker connectors.
speakON
connector
output
stage A
output
stage B
CHA +
CHA
CHB +
CHB
Bridge-tied load
Two single-ended loads
CHB –
CHA –
A
B
speakON
connector
output
stage A
output
stage B
CHA +
CHB +
CHB –
CHA –
A
B
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
FIGURE 22: Output loudspeaker connections:
TOP: single-ended load; BOTTOM: bridge-tied load.
rst polarity
inversion
second polarity
inversion
Channel 1
input
Channel 2
input
Channel 1
output
Amp
Channel 2
output
FIGURE 23: Internal signal path polar-
ity with example input signals. Both channels
1 and 2 are fed the same sine signal.