6.4
Stereo reverse
This mode is similar to the Tandem mono mode. Apart from depressing the
Link switch, you also depress the Phase reverse switch, as in the Bridge
mono. Channel B is now phase reversed. To compensate for that, connect
pin +1 on channel B Speakon to speaker negative terminal and pin -1 on
channel B to speaker positive terminal.
Figure 11. Stereo reverse mode
Channel A output is connected as in the normal stereo mode. By having
channel A and B operating in opposite polarity, the energy storage in the
power supply is more efficient. This means that the amplifier can deliver up
to 10% more power than in tandem mono mode. This is significant for
signals below 100Hz (sub bass etc.).
7
OPERATION
7.1
Operation precautions
•
Make sure that the power switch is off before making any input or
output connections or operating the switches on rear panel. See pages
6-11 about installation.
•
Make sure that the AC mains is correct and the same as that printed on
the rear panel of the amplifier. See pages 6-8 about operating voltage
and power consumption.
• Make sure that the switches on the rear panel for operation modes and
clip are in the correct position. See pages 11-13 about operation modes
and page 15 about clip limiters.
•
It is always a good idea to turn down the gain controls during power up
as this prevents speaker damage, especially if there is a high level
signal at the input.
Martin Audio – MA1.3 Power Amplifier
E
NGLISH
13
1
2
3
–
–
–
+
+
+
CH A
+
1
2
3
–
–
–
+
+
+
CH B
+
I/P
LINK
PHASE
INVERT
CONTENTS
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