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Speaker Connections
f
RCA
3.5 mm
TRS
Captive
Screw
Figure 6.
Speaker receptacle (see figure 2) — Connect
the speakers to the speaker receptacle using the
2-pole, 5 mm screw-lock captive screw connector
(MPA 401-100V shown at right).
NOTES:
•
The mono audio speaker receptacle may be labeled in one of two ways (see
the diagrams above). The wiring and function are the same whichever way the
product is labeled.
•
The MPA 401 amplifier sums the left and right signals from both the TRS and
RCA inputs to form Sum 1. Sum 1 is then weighted. At the same time, the
amplifier sums the left and right signals from the captive screw input to form
Sum 2. Sum 1 and Sum 2 are then summed together to form a single mono
signal. See figure 6 below for more details.
•
The captive screw, RCA and TRS inputs are buffered.
L
R
+
+
L
R
+
L
+
-
+
R
-
+
Summing MPA 410 input signals to form a single mono output signal
The MPA 401-70V provides up to 40 W for a 70 V line distributed sound system; the
MPA 401-100V provides up to 40 W for a 100 V line distributed sound system.
See the
attention
and the
connecting wires to captive screw connectors.
ATTENTION:
Do not ground or short the speaker outputs as this will damage
the amplifier.
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling
Sum 1
Sum 2
note
on page 6 for important information about
OUTPUT
100V OUTPUT
100V
CLASS 2 WIRING
+
+
Amp Stage
9
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