Operation
Sleep Switch
The Black Max amplifier includes a sleep mode feature that greatly reduces
the power consumption of the amplifier after it has been idle (no audio
activity) for more than 3 minutes. Any audio activity present at the input
will power up the amplifier instantaneously and noiselessly, so that there is
no loss of audio. The Sleep Switch is located on the rear of the unit. The
sleep feature is activated by setting the switch to the AUTO position.
Setting the switch to the OFF position will inhibit the amplifier from ever
entering sleep mode.
Power Sequencing Switch
The setting of the Power Sequencing Switch on the rear of the Black Max
amplifier determines how the amplifier will power up. When the switch is
set to the OFF position, the amplifier will power up and down convention-
ally when the front Power Switch is turned ON and OFF.
To use the sequencing feature built into the amplifier, the Power
Sequencing Switch must be placed in the ON position on a slave amplifier.
The slave amplifier will now power up when it receives the proper trigger
through the terminal strip wiring (see
Sequential Turn-On
section for prop-
er wiring of the power sequencing terminal strip). With the Power
Sequencing Switch in the ON position, placing the front Power Switch in
the ON position will not result in the amplifier turning on. It will instead
remain in a standby state until triggered through the sequencing feature.
Power Status Indicator
A Power Status Indicator is provided on the rear of the amplifier. The Black
Max amplifier has different states of powering up, depending on whether
power sequencing is used or not. The Power Status Indicator provides 3
different status indications:
Not Lit -
Indicates that the unit is not plugged in or is not being supplied
AC power at the line cord.
Amber -
Indicates that the unit is in standby state where it is being sup-
plied with AC power at the line cord but it has either:
1
) not
received the sequencing trigger that will allow it to change to
the fully-powered state if the Power Sequencing Switch is set
to ON, or 2) the front Power Switch has not been turned ON
if the Power Sequencing Switch is set to the OFF position.
Green -
Fully-powered, the unit has either:
1
) received the sequencing
trigger if the Power Sequencing Switch is set to the ON posi-
tion, or 2) the unit’s front panel Power Switch has been turned
ON if the Power Sequencing Switch is set to the OFF position.
CH B Input Select Switch
Determines whether the amplifier's output channel 'B' sources its input
signal from "B BAL INPUT" or "A BAL INPUT" connectors.
Note:
When set to "IN A", "B BAL INPUT" connector and CH B "Input
Sens" Switch are not active, but CH B level control and Low Cut Switch
are active.
Input Sensitivity Switch
Each input has a user-selectable sensitivity switch. When operating
with standard line-level source equipment, the input should be set for
1
V. When operating with low-level source equipment, the input
should be set for 0.
1
V.
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