User guide

SPECIAL FUNCTIONS
PAGE 27AMIS-DMA1 INSTALLATION & OPERATION MANUAL
8.2 Amplifi er Bridging (40W)
The DMA1 has the capability of bridging the outputs of the stereo power
amplifi er to create a 40W bridge-mono confi guration - to power a single
8ohm loudspeaker of greater power capacity.
To enable this operational mode, in addition to wiring the speaker
in a bridged confi guration, it is necessary to set the following parameters
in the confi g.txt fi le:
OMON=1
INVR=1
OMON STEREO / MONO AUDIO OUTPUT SWITCH
OMON
0= STEREO audio output
1= MONO audio output
INVR INVERTED RIGHT CHANNEL AUDIO OUTPUT SWITCH
INVR
0= right audio output channel not inverted (STEREO)
1= right audio output channel inverted (BRIDGE-MONO confi guration)
Panelplayer 20W + 20W STEREO Panelplayer 40W MONO
PRE
IN
PRE
OUT
SPK
OUT
LR LRLR12345678
LOGIC
INPUTS
12-24
VDC IN
E
ON
PLAY
VOLUME
SD/MMC
MEMORY
REMOTE
CONTROL
Digital Message Announcer
DMA1
PRE
IN
PRE
OUT
SPK
OUT
LR LRLR12345678
LOGIC
INPUTS
12-24
VDC IN
E
ON
PLAY
VOLUME
SD/MMC
MEMORY
REMOTE
CONTROL
Digital Message Announcer
DMA1
++
– –
20W 20W
+
–
40W