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DESCRIPTION
4-channel audio transformer
• Output transformer for power amplifiers or speakers without built-in 70 V or 100 V audio transformer
• 4 x 250 W
• Use your existing amplifier for distributing the sound signal in a PA system
• Converts low-impedance signals into 70 V or 100 V signals
• Connections via terminal blocks
• Signal indicators
• Rugged steel chassis
• Rack installation, 1 U
ELECTRICAL CONNECTION
Cabling a PA system is an electric installation which must only be carried out by a qualified electrician!
1. If the PA system is turned on, turn it off before making any connection.
2. The IN terminals of zones 1 to 4 serve as inputs for low-impedance signals. Connect your amplifiers here
to each of the positive and negative poles.
3. The OUT terminals of zones 1 to 4 serve as signal outputs for PA speakers or speaker groups with 70 V
and 100 V audio transformers. In each case, connect the PA line to the terminals COM (negative pole)
and 70V or 100V (positive pole). The total load per zone must not exceed 250 W
amplifier may be damaged by overload.
4. As soon as a signal is present at the inputs, the control LEDs SIGNAL will light up.
RACK INSTALLATION
This unit is built for 483 mm racks (19"). The rack you use should be a double-door rack where you can open
the front panel and the rear panel. The rack should be provided with a cooling fan. When mounting the unit
into the rack, please make sure that there is enough space around the device so that the heated air can be
passed on. Steady overheating will damage your device.
You can fix the unit with four screws M6 in the rack. If several devices are to be installed, make sure that you
leave 1 unit space between the devices.
Be careful when mounting the unit into the rack. Put the heaviest devices into the lower part of the rack. Be
aware that fastening the unit with four screws on the front panel is not enough. In order to ensure safety,
additional fastening by using ground and side bars is necessary.
DANGER TO LIFE!
High voltage at terminals. Installation by skilled personnel only!
Turn off PA system before connecting.
10/12
, otherwise the
RMS
00030071.DOC, Version 1.1
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