Extron electronic MLS 406MA manual Wiring for 4 ohm or 8 ohm speakers MA models, Ohm Total Load

The MA models’ amplifier power-up delays are approximately

•10 seconds for 70 V or 100 V output, 8 seconds to hear the relay click

•8 seconds for 4 ohm or 8 ohm output

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

The maximum power output when an MLS 304MA or MLS 406MA is wired for 4 ohm or 8 ohm speakers is 20 watts per channel.

1.Flip the toggle switch down (Direct) to select 4 ohm or 8 ohm connection.

2. Use the appropriate wiring for the load as shown in the following illustrations.

Mono +

AMPLIFIED OUTPUT 20 WATTS MONO

XFMR

4/8 ohm COM 70V 100V

DIRECT

Mono –

4 Ohm Load or

8 Ohm Load

Mono +

AMPLIFIED OUTPUT 20 WATTS MONO

XFMR

4/8 ohm COM 70V 100V

Mono +

4/8 ohm

4 ohms

4 ohms

8 ohms

8 ohms

4 ohms

4 ohms

PRELIMINARY

DIRECT
Mono –	Mono –

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

Mono +
AMPLIFIED OUTPUT 20 WATTS MONO
XFMR
4/8 ohm COM 70V 100V	4 ohms

DIRECT

4 ohms

Mono –

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

4 Ohm Total Load

Mono +

8	8
ohms	ohms

4/8 ohm

8	8
ohms	ohms

Mono –

8 Ohm Total Load

MLS 304 Series, MLS 406 Series • Installation 2-11