Instruction Manual

Manual-2
FRONT PANEL DESCRIPTION
 POWER switch: Obediently turns the MA 6S on and off every time you poke it with your finger (or other suitable object). All six
channels have delayed turn-on/instant turn-off relays to eliminate any switching transients.
 THERMAL Overload indicator: Lights red if the MA 6S becomes too hot, indicating that power has been removed from all six
channels. Be sure to check the fan filter and actual speaker impedances if this lights up.
 POWER indicator: Lights yellow whenever the MA 6S POWER switch () is turned on.
 READY indicators: Light green whenever the mute relay is passing the signal through to the speaker. Normal operation is the on
status.
 SOA LIMIT indicators: Light red whenever a channel leaves the Safe Operating Area (SOA). is means the amplifier turned
down the Input level quickly and automatically, avoiding over-dissapation. Input signals 30 dB over a safe limit will cause the
READY indicator and mute relay to turn off until the amplifier has been turned off and the problem corrected. Normal operation
is the off status.
 CLIP LIMIT indicators: Light red whenever a channel’s Output cannot follow its Input. e amplifier has turned down the
Input level quickly and automatically, avoiding audible distortion. Normal operation is the off status.
 LEVEL controls: Determine the Input sensitivity of each respective amplifier channel. At its full clockwise position, an Input
signal of 0 dBu (.775 vrms) drives the amplifier to full power. As the controls are rotated counterclockwise, more Input signal level
will be needed to achieve full power. If the calibrations in gray appear backwards with respect to most level controls, it is because
they are Input sensitivity markings, not attenuation indications.
NOTE: To install the MA 6S security covers, which have been supplied with the amplifier in the form of six small black plastic caps, set the
six LEVEL controls to the desired position and then pull the knobs off. Insert the plastic covers in the now vacant holes. You may then
sleep soundly knowing that your amplifier installation cannot be mindlessly violated.
POWER
3 6542
LEVEL
1
POWER
THERMAL
CLIP LIMIT CLIP LIMIT CLIP LIMIT CLIP LIMIT CLIP LIMIT CLIP LIMIT
SOA LIMIT SOA LIMIT SOA LIMIT SOA LIMIT SOA LIMIT SOA LIMIT
READY READY READY READY READY READY
100
2
4
8
6
LEVEL
100
2
4
8
6
LEVEL
100
2
4
8
6
LEVEL
100
2
4
8
6
LEVEL
100
2
4
8
6
LEVEL
100
2
4
8
6
MA 6S
BRIDGED BRIDGED
+4
+10
+20
dBu
0
+4
+10
+20
dBu
0
+4
+10
+20
dBu
0
+4
+10
+20
dBu
0
+4
+10
+20
dBu
0
+4
+10
+20
dBu
0
MULTI
CHANNEL
AMPLIFIER
BRIDGED (INACTIVE)(INACTIVE) (INACTIVE)
1
2
76
3
4 5