Extron electronic SF 228T manual Direct 8 Ohm Connection to an Amplifier, One Speaker

Direct 8 Ohm Connection to an Amplifier

1.An amplifer 8 ohm speaker output can be directly connected to the speaker terminal of the SF 228T, (see the diagram below).

	Black Wire	Red Wire
		From
		Amplifier
From Amplifier	Terminal Cover Plate
Black Wire

Red Wire

Rear of Speaker

Speaker Terminal	Direct 8 ohm Connection
	(Bypassing the Transformer)

Figure 10. Direct Amplifier Connection to Speaker

2.Route the wires from the amplifier speaker output to the speaker using the same procedure for routing speaker wire (and conduit if applicable) through the terminal cover plate, see “Installing the Speakers” on page 3.

3.Strip 3/16 inch (5 mm) from the ends of the two speaker wire leads coming from the amplifier. Keep the wire strands together by twisting them (do not tin the wires).

4.Secure the wires to the input terminals of the speaker, observing the correct polarity. Connect the red positive (+) wires to the + speaker terminal and the black negative (–) wires to the – speaker terminal.

	Red Wire ,
Red Wire ,	From Amplifier
	To Second Speaker
From Amplifier
	From Amplifier
Black Wire .
	To Second Speaker
	Black Wire .

One Speaker Two Speakers

Figure 11. Speaker Terminal Wiring

5.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.

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

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

SF 228T Speaker System • Installation 8