Figure 10. MLS switches on rear panel
6
OPERATION MODES
6.1
Stereo operation
For stereo (dual channel) operation, leave the Link and Phase reverse
switches in the un-depressed position. In this mode, both channels operate
independently of each other, with their level attenuators controlling their
respective levels. Never connect either output terminal to ground or in
parallel. The recommended minimum nominal impedance for stereo or
tandem operation, is 2 ohms per channel.
6.2
Tandem mono
For tandem (dual channel-single input) operation, depress the Link switch.
Both channels can now be driven by a signal at either input connector. The
output connection is the same as in stereo mode. You can use either TRS
connectors for linking out etc. Do not use the remaining XLR and TRS
connectors for mixing or other purposes. Both level attenuators are
active, allowing you to set different levels for each channel.
Never connect either output terminal to ground or in parallel.
6.3
Bridged mono
To bridge the amplifier, depress the Link switch (7) and Phase reverse switch
(6). Both channels are then driven by a single signal at either input. You can
use any remaining input connectors for linking etc. Do not use the remaining
XLR and TRS as input jacks simultaneously for mixing or other purposes.
To obtain an output, connect the speaker leads to pin +1 on channel A
Speakon to speaker positive terminal and pin +1 on channel B
Speakon to speaker negative terminal. Do not connect either of the -1
(negative) pins of the Speakons. Do not connect speakers to channel
A or B in the normal manner in bridge mode, as this can cause
serious damage.
Martin Audio – MA4.2 Power Amplifier
E
NGLISH
13
-5
-4
-2
0
1+ CH.B+
1– CH.B–
OUTPUT CH.B
MLS
Switc
h
dB
CONTENTS
<
>
GUIDES
APPLICATIONS GUIDE
