IT-42 Installation Guide
INTRODUCTION
The IT-42 is an output isolation transformer accessory for the QSC CX 302 amplifier, allowing it to drive two 25-, 70-, and 100-volt distributed lines in stereo or
parallel, or a single 140- or 200-volt line in bridged mono. It mounts conveniently to the back of the amplifier and requires no additional rack space.
In stereo or parallel modes, the two distributed lines may be loaded at up to 400 watts each. In bridged mono, the distributed line may be loaded at up to 800
watts.
Figure 1 shows the necessary mounting and configuration features of the IT-42
6
3
4
5
1. Mounting tabs
2. Transformer input wires with spade lug connectors
3. Isolated output barrier strip
4. Transformers
1
2
5. Slotted mounting tabs (× 2)
6. #8-32 × 5/16” Philips screw, black (× 2), included
6
Figure 1
INSTALLATION
Although the IT-42 transformer accessory can be installed while the amplifier is already rack mounted, installation is much easier with the amplifier out of the rack
and placed face-down so it rests on its front panel.
CAUTION: Turn off the amplifier before installing the IT-42 accessory.
1. Open the safety shroud over the amplifier’s output barrier strip. Fully loosen—but do not remove—the two screw terminals at the top and the two at the bottom.
2. Align the spade lug connectors on the transformer input wires with their respective screw terminals and slide them fully onto the screws. Tighten
the screw terminals.
Figure 2
3. Insert the slotted mounting tabs on the right end of the IT-42 into the slots in the amplifier chassis (Figure 2).
4. Align the holes in the mounting tabs on the left end of the IT-42 with the threaded holes in the amplifier chassis. Insert and tighten the
mounting screws.
Figure 3
5. Press the right end of the bracket in to the left so that the slotted tabs lock to the amplifier and will not pull out (Figure 3).
Rack mounting
The IT-42 adds to the depth of the amplifier, so you
must allow more space at the rear of the rack. See
Figure 4. Because of the additional weight of the
transformers, it is important to support the amp at the
To front rack rail
Vers le rail montage avant
Zur Vorderrackstange
Hacia la barandilla de
montaje anterior
CX 302 Amplifier • Amplificateur CX 302 • CX 302-Verstärker • Amplificador CX 302
back, even in fixed installations. Rear rack ear kits for QSC
amplifiers are available from QSC’s technical services
department or from your dealer or distributor.
16.48"
418.6 mm
If you are using in the same rack two or more
amplifiers with transformer accessories, separate
them by at least one rack space to minimize crosstalk.
Figure 4
17.31"
439.7 mm
*TD-000081-00*
TD-000081-00
Preliminary
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