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8 – CXA160 / CXA80
24. Output Connectors
This is a five-position barrier strip for connection of speaker
loads. Each terminal accepts bare wire from 22 AWG
to 10 AWG, or spade lugs sized for the same range of
conductors.
Terminals are provided for 4 ohm low-impedance loads or
25, 70 and 100 Volt high-impedance loads.
All outputs with the exception of the 4 ohm output are
transformer isolated.
LOW IMPEDANCE
To connect a speaker directly, connect the lower GND
terminal to the negative post of your speaker, and connect
the 4 ohm terminal to the positive post.
Make sure that your average speaker impedance is not less
than 4 ohm, as this may overload the amplifier.
The speaker output connectors are screw terminals. Use
16 or 18 gauge wire for connecting the amplifier outputs to
the speakers. Strip the wire back about 3/8" inch, loosen
the screw enough to loop the wire around the shaft of
the screw (clockwise), and tighten down the screw with a
screwdriver.
HIGH IMPEDANCE
If you are using a constant-voltage distributed speaker
system, connect either the 25 V, 70 V, or 100 V output
terminal to the "+" side of the speaker system, and connect
the upper "GND" output terminal to the "–" side of the
speaker system.
The voltage of your speakers must equal the voltage of the
amplifier's output terminal ( 25 V, 70 V, or 100 V).
CAUTION: Make sure that you do not overload the
amplifier. This may cause overheating to the amplifier, and
possible damage to your speakers. To avoid overloading,
make sure that the taps on the speakers add up to no more
than 80% of the rated power of the amplifier being used
(CXA160: 128 watts, CXA80: 64 watts). For example, for the
CXA160, you could use a maximum of 12 speakers with 10
watt taps (12x10 = 120 watts). For further protection, use
these figures as the maximum power sum of all the speaker
taps: CXA160: 100 watts, CXA80 50 watts.
CAUTION: To prevent the risk of electric shock, never
touch the bare wires coming from the OUTPUT TERMINALS
of the amplifier when it is switched on. When the
connections have been made, insulate the 25 V, 70 V, and
100 V terminals of the amplifier using the protective cover
supplied.
GND and 25V are used to connect a string of 25V speakers.
Use Class II wiring:
GND and 70V are used to connect 70V speakers.
Use Class II wiring:
26 24
25
0
0
0
70V 70V
70V
0 0 0
25V
25V
25V
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