Nilfisk-ALTO MAC 2.3, MAC 2.4

6. Breaker

This switch works as fuse for protecting the unit from damage. When the unit is overloaded or the temperature

inside the unit is too high, this pushing-button will spring up and break the power supply. The power supply

will be restored with pushing the switch down again.

7. AC Inlet

This connector is meant for the connection of the supplied main cord. Do not insert the power cord into this

unit until voltage has been correctly set. Do not plug the power cord into the mains until the voltage has been

correctly set.

8. Input Connectors

These connectors include the balanced XLR servo connectors and 1/4" TRS phone jacks. It is used to connect

the input signal.

9. Output Connectors

These connectors include the speak-on jacks and binding post terminals, you can output the powered signal

by the specific output connectors according to the actual application circumstance.

Caution: turn off the unit before connecting the output connectors so as to avoid any electric shock!

5. Level Control

These level controls are used to adjust the output signal level, you'd better adjust them properly to avoid any distortion.

3.2 Rear Panel

Set this switch at "ON" position, once the output level is above the maximum level, the clip limt begin, which

is used to keep fixed output level for protecting apparatus. If the switch is at "OFF", this clip limt function

doesn't work.

10. Clip Limit Switch

Setting this switch to "ON" is equal to adding an appropriate low-pass filter in the input circuit, which is used to protect

the speaker system from the damage caused by large subsonic frequencies.

11. LF 30Hz Filter

12. Mode Selector

The MAC 2.2/2.3/2.4 stereo power amplifier presents three operating modes:

- Stereo Mode

In this mode, CHA and CHB operate independently (as a conventional stereo amplifier)

The CHA input signal will be output from the CHA output connector, and CHB input signal will be output from

the CHB output connector.

- Parallel Mono Mode

In this mode, CHA input signal will be output from the output connectors of both channels, detail wiring

diagram you can refer to chapter 5.

- Bridged Mode

These signal indicators light up when the output is more than 100mV.

Signal LED

BRIDGED INPUT

SERIAL

MODEL

WARNING

TO REDUCE THE RISK OF FIRE

OR ELECTRIC SHOCK, DO NOT

EXPOSE THIS APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTION BEFORE

USING!

CH-2

LINE

BALANCED

INPUT

LINE

CH-1

CLIP LIMT

OFF ON

BRIDGED

STEREO

PARALLEL

(MONO)

OFF ON

LF 30HZ

FILTER

1.15V/20K

INPUT

CONNECTION

(+)

()

(GND)

SRT

T(+)

S(GND)

R( )

CH-1 CH-2

BRIDGED

MONO

CHANNEL 1 CHANNEL 2

A104

BREAKER

Apparaten skall anslutas till

jordat uttag nar den ansluts

till ett natverk

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