Extron electronic SF 228T manual Proceed to Completing the Installation on

e.To wire additional speakers, route the 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. See below.

NOTE: Pay close attention to the polarity of the wires. Do not mix negative and positive wires.

V

COM 70 V

	W
W	16
32
	NC
COM
100

		NC
	W		2W
8W	2			Red Wires
	8W
	W	4W
	4
	W
W	16
32

Black Wires	From Amplifier (+)
	To Next Speaker (terminal tap)

From Amplifier (–)

To Next Speaker (COM terminal)

Figure 8. Wiring Additional Speakers

2.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 below.

Terminal Cover Plate

From Transformer

Black Wire

Red Wire

Rear of Speaker

Speaker Terminal

Figure 9. Connect the Speaker Wires

3.Replace the terminal cover plate and tighten the two cover plate screws that were loosened in step 3 of “Installing the Speakers” on page 3.

4.Test the system by powering on the amplifier and listening for the correct response from the speakers. Disconnect the power from the amplifier.

5.Proceed to “Completing the Installation” on page 8.

SF 228T Speaker System • Installation 7