Extron electronic MLS 304MA, MLS 406 Wiring for 4 ohm or 8 ohm speakers SA models, Stereo Output

L	Amplified output (MLS 304SA, MLS 406SA only) — Cable speakers to this
	5-position screw terminal for either stereo or dual mono amplified audio
	output. The switcher’s default setting is stereo output. Dual mono (the same
	signal output on both channels) can be selected via software.

CDo not short the terminals to ground or the amplifier will be damaged. Do not connect anything to the middle position of the 5-position screw terminal; it is not connected to ground.

CDo not bridge mono outputs. Bridging could damage the amplifier.

The SA models’ amplifier power-up delay is 8 seconds for either 4 ohm or 8 ohm output

Wiring for 4 ohm or 8 ohm speakers (SA models)

NThe maximum power output when an MLS 304SA or MLS 406SA is wired for 4 ohm speakers is 24 watts (12 watts per channel). Maximum power output for 8 ohm speakers is 16 watts (8 watts per channel).

Stereo Output

Stereo R+ Stereo L+

	AMPLIFIED OUTPUT
RIGHT		LEFT	CLASS 2 WIRING
4/8 ohm	STEREO OR DUAL MONO

Stereo R– Stereo L–

4 Ohm Load or

8 Ohm Load

Dual Mono Output

Mono + Mono +

	AMPLIFIED OUTPUT
RIGHT		LEFT	CLASS 2 WIRING
4/8 ohm	STEREO OR DUAL MONO

Mono – Mono –

4 Ohm Load or

8 Ohm Load

PRELIMINARY

Stereo or Dual Mono Output

Mono +

or

Stereo R+

88

ohms ohms

Mono +

or

Stereo L+

	AMPLIFIED OUTPUT
RIGHT		LEFT	CLASS 2 WIRING
4/8 ohm	STEREO OR DUAL MONO

8 ohms

Two 8 ohm speakers wired in parallel equal a 4 ohm load.

8 ohms

Mono –	Mono –
or	or
Stereo R-	Stereo L-

4 Ohm Total Load

Stereo or Dual Mono Output

4 Ohm Total Load

Mono +

or

Stereo R+

4ohms

4ohms

Mono +

or

Stereo L+

	AMPLIFIED OUTPUT
RIGHT		LEFT	CLASS 2 WIRING
4/8 ohm	STEREO OR DUAL MONO

Two 4 ohm speakers wired in series equal an 8 ohm load.

4 ohms

4 ohms

Mono –	Mono –
or	or
Stereo R-	Stereo L-

8 Ohm Total Load8 Ohm Total Load

MLS 304 Series, MLS 406 Series • Installation 2-13