M Box 0E-IA1250, Manual

Page: 12 / 68

12
Connections
Speaker Connections
The 0E-IA1250 has three amplifier modes for zone
speaker connections. Bridged 8 Ohms, 4/8 Ohms
Stereo and 70V/100V. Any mix of amplifier modes
is allowable in different zones...as long as they
are configured correctly. NEVER CHANGE THE
70V/100V HIGH VOLTAGE SPEAKER OUTPUT,
8Ω/4Ω - 70V/100V OR STEREO/BRIDGED
SETTINGS WHILE THE AMP IS TURNED ON OR
CONNECTED TO AC POWER!!!
BRIDGED 8Ω
Bridging a zone amp creates an 8 Ohm,110 Watt
mono amplifier. You will need to use two bridged
zones for stereo.
1. Stereo/Bridged Switch - Set to the Bridged
position.
2. 8Ω/4Ω-70V/100V Switch - Set to the 8Ω/4Ω
position.
3. Speaker Connections - Connect the wire from
the ‘speaker -’ terminal to the ‘Bridge 8Ω -’
terminal as shown in: Bridged 8Ω Connection.
Connect the wire from the ‘s’ terminal to
the ‘Bridge 8Ω +’ terminal as shown in: Bridged
8Ω Connection.
4. Zone Line IN - Connect the source left channel
OUT to the left channel Line IN on the LOWER
NUMBERED bridged zone. Connect the source
right channel OUT to the left channel Line IN on
the HIGHER NUMBERED bridged zone.
4Ω/8Ω
This configuration creates a standard zone stereo
speaker output. (30W @ 8 Ohms/50W @ 4 Ohms)
1. Stereo/Bridged Switch - Set to the Stereo
position.
2. 8Ω/4Ω-70V/100V Switch - Set to the 8Ω/4Ω
position.
3. Speaker Connections - Connect the wire from
the right ‘speaker -’ terminal to the right ‘4/8Ω -’
terminal as shown in: Stereo 4/8Ω Connection.
Connect the wire from the right ‘s’
terminal to the right ‘4/8Ω +’ terminal as shown
in: Stereo 4/8Ω Connection. Repeat for the left
channel speaker.
4. Zone Line IN - Connect the L & R line level OUT
on the zone audio source to the appropriate
zone L & R LINE IN.
High Power
8Ω Speaker
Right Left Right Left
High Power
8Ω Speaker
8Ω/4Ω
70V/100V
Set to: 8Ω/4Ω
Stereo/Bridged
Set to: Bridged
Bridge 8Ω
-/+ Terminals
Right Left
Medium Power
4/8Ω Speaker
8Ω/4Ω
70V/100V Switch
Set to: 8Ω/4Ω
Stereo/Bridged
Switch
Set to: Stereo
4/8Ω
-/+ Terminals
Right Left
Bridged 8Ω Connection
Stereo 4/8Ω Connection