5
systems, all similar loudspeaker terminals (in
most cases one terminal is marked with a red
dot) must be connected to the same wire on
the distribution cable.
2.12 Mounting the unit into a 19” rack
WARNING:
For safety reasons this unit may only be
mounted in a 19” rack with lockable top
and bottom covers, side panels, and rear
door(s), which can only be opened by
skilled technicians, and should be fitted so
that mains terminals and all live parts are
not accessible from outside the rack.
The unit may be mounted into a rack by
means of four bolts with washers, via slots in
the front panel. No further mechanical
support is necessary.
The units should be mounted with 1HE
spacing panels (fig. 11) and rack forced
cooling should be considered, especially
when the units are used continuously at full
power with music and speech (call) at an
ambient temperature of 55°C max. (acc.
IEC 65).
Mounted in a (19”) cabinet, the temperature
inside the cabinet will be valid as ambient
temperature for the amplifier. Exceeding this
temperature can cause a decrease in the
amplifiers expected life-time. Depending on
the installed power in a cabinet, a number of
precautions are advised . (Refer also to
fig. 11).
3 CONTROLS (see fig. 1)
1 Mains on/off switch.
2 Sensitivity control pre-set for ch-1, ch-2,
ch-3 and ch-4 ‘music’ inputs only.
3 Output leven VU-meter plus illuminated
scale (mains on).
4 Four position selector switch for
monitoring individual amplifier channels
via the VU-meter and headphones.
5 Headphones socket (6.3 mm standard
jack socket).
