Extron Electronics FF 120T - Manual (Page 3)

3
Product Category
d. Secure the wires to the appropriate taps on the captive screw connectors
of the 7-connector terminal block (on the transformer side of the cover plate)
as indicated on the tap label (see the note below). The black
negative (-) wire attaches to the “COM” terminal, and the red
positive (+) wire attaches to the desired terminal tap
(see the diagram at right).
NOTE: Observe the 70 V or 100 V system designation
as indicated on the tap label.
NC 1 W 2 W 4 W 8 W 16 W COM
70
V
100
V
COM NC 16 W 8 W 4 W 2 W 1 W
e. Use a small flat blade screwdriver to tighten the terminal
block screws.
f. To wire additional speakers, route speaker wires
from the second speaker through the cover plate
hole to the transformer side. Twist the black negative (-)
wires together and the red positive (+) wires together before
inserting them into the terminal block. Additional speakers can be
daisy-chained this way, as shown at right.
8. Connect wires from the transformer to the speaker.
a. Keep the wire strands together by twisting them (do not tin the wires).
b. Connect the red positive (+) wire to the + speaker terminal and connect the black negative (-) wire to the - speaker
terminal as shown in step
9b below.
c. Proceed to step 10.
9. See the following block diagram.
a. Route the wires from the amplifier to the speaker using the same procedure for routing speaker wire (and conduit if
applicable) through the transformer cover plate as described in steps
4 through 7b (see the wire gauge table on page
1). Strip 3/16 inch (5 mm) from the ends of the two speaker wire leads (+ and -) coming from the amplifier. Keep the wire
strands together by twisting them (do not tin the wires), and secure the wires to the input terminals of the speaker while
observing the correct polarity.
Direct Connection
(bypassing the transformer)
Amplifier
Transformer
FF 120T
b. Connect the red positive (+) wire to the + speaker terminal and connect the black negative (-) wire to the - speaker
terminal, depending on whether one or two speakers are being connected, as shown below.
Red Wire
Black Wire
From Amplifier
One Speaker
From Amplifier
Red Wire
Black Wire
To Second Speaker
From Amplifier
To Second Speaker
Two Speakers
10. Replace the transformer cover plate and tighten the two cover plate screws that were loosened in step 4.
NC
1 W
2 W
4 W
16 W
COM 70 V
100
V COM
NC
16 W
8 W
4 W
2 W
1 W
8 W
Wiring to a Single Speaker
NC
1 W
2 W
4 W
16 W
COM
70 V
100
V COM
NC
16 W
8 W
4 W
2 W
1 W
8 W
Wiring to Multiple Speakers
Red Wires
Black Wires
From Amplifier (+)
To Next Speaker (tap)
From Amplifier (-)
To Next Speaker (com)