Figure 3
Figure 2

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

 

1

 

 

 

 

2.

Transformer input wires with spade lug connectors

 

 

 

 

 

 

 

 

 

3.

Isolated output barrier strip

2

 

 

 

 

4.

Transformers

 

 

 

 

 

 

 

 

 

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.

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.

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 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.

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.

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

16.48" 418.6 mm

Figure 4

17.31"

 

 

 

 

439.7 mm

 

 

 

 

 

 

 

 

 

 

*TD-000081-00*

TD-000081-00

Preliminary

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QSC Audio IT-42 manual Introduction, Installation, Rack mounting
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IT-42 specifications

The QSC Audio IT-42 is a versatile power amplifier designed to deliver high-quality audio performance in a wide range of professional sound applications. Known for its efficiency and reliability, the IT-42 is widely used in commercial installations, live events, and permanent sound systems.

One of the key features of the IT-42 is its power output capacity. With a robust design, this amplifier can deliver up to 2000 watts of peak power, making it suitable for driving a variety of speaker types and configurations. The amplifier operates in a 2-channel mode, providing flexibility for different sound setups, including stereo and mono applications. This versatility makes it an ideal choice for both small and large venues.

The IT-42 employs advanced technologies to ensure optimal performance and audio fidelity. It is equipped with QSC's proprietary PowerWave technology, which maximizes efficiency and reduces heat generation. This means the amplifier can run cooler, extending its longevity and reducing the need for extensive cooling systems in installations. Additionally, the IT-42 features an intelligent thermal management system that automatically adjusts fan speeds based on the amplifier's temperature, keeping it operating quietly and efficiently.

Another significant characteristic of the IT-42 is its comprehensive input and output options. The amplifier includes XLR and TRS inputs, allowing for seamless integration with various audio sources. It also provides balanced outputs, making it easy to connect to other equipment in a signal chain. This connectivity is crucial for professionals who demand flexibility in their audio setups.

The IT-42 also incorporates advanced DSP processing capabilities. With onboard signal processing features, users can fine-tune the audio output to suit different acoustic environments. The amplifier allows for adjustable equalization settings, crossover frequencies, and limiter functions, enabling tailored sound profiles for various applications.

In terms of build quality, the QSC IT-42 is constructed with durability in mind. Its rugged chassis is designed to withstand the rigors of daily use in demanding environments. Moreover, the amplifier features soft-start circuitry, which helps prevent power surges during operation, protecting both the amplifier and connected speakers.

In conclusion, the QSC Audio IT-42 power amplifier is a powerful, reliable, and versatile solution favored by audio professionals. With its impressive power output, advanced technologies, intuitive controls, and robust construction, the IT-42 is an excellent choice for any sound installation looking to achieve exceptional audio performance.
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