MA60 & MA60
media
Installation and User Guide v1.0
24
The output connector is a 4-pin 3.5 mm-pitch screw terminal type on the rear panel
10
. Two of the pins (labelled ‘0 V’ and ‘8Ohm’) are the low-power, lo-Z output, with
one pin connected internally to 0 V. The other two pins (labelled ‘600Ohm’) are the
transfomer-isolated line level output, suitable for connection to a nominal 600 ohm
load. The output level is nominally 0 dBu, and is transformer-coupled to provide full
galvanic isolation from a telephone system.
1
2
3
4
8 ohm 600 ohm
-
+
Lo-Z loudspeaker
1
2
3
4
8 ohm 600 ohm
To MOH input of
telephone system
MOH/Utility Output
OR
Before using the MOH/Utility output with a telephone system, it is recommended
that the system manual is consulted to check suitable audio levels and any other
compatibility issues.
MOH/Utility Output level and source
The signal at the MOH/Utility output may be any required mix of the music signal and
the microphone signal, and is set using the rear panel presets MIC LEVEL control
11
and MUSIC LEVEL
12
. The relevant signal level is zero with the preset control in its
fully anticlockwise position. Note that the signal at this output is NOT altered by the
front panel MUSIC LEVEL control or the rear panel MUSIC EQ preset adjustments.
Note that the MIC LEVEL control should be turned fully down if the output is used
for MOH with a telephone system, otherwise internal paging announcements will be
heard by telephone callers.
If the output is used as an auxiliary feed, it will generally need to follow the normal
music source selection. This is the factory default configuration. If Music Priority is
enabled (see “Music Priority” on page 17), the MOH/Utility output will switch to
Line 4 along with the main output if the input becomes active.
However, when in use with a telephone system as an MOH source, it is generally
more desirable for the music source to remain constant, and not vary with the front
panel MUSIC SOURCE control. For this purpose, the source for the MOH/Utility
output can be fixed by moving internal jumper J6. Any of the four line inputs, or the
alternative Line 2 MP3 input
2
, may be selected as the fixed MOH music source. See
“PCB layout diagrams” on page 30 for further information regarding the internal
jumpers.
