CONFIGURATION

With the IT-42 installed, the CX 302 amplifier can operate in several different configurations listed below.

TWO-CHANNEL OR TWO-ZONE OPERATION (STEREO OR PARALLEL)

Both channels 25V

Both channels 70V

Both channels 100V

One channel 25V, the other 70V or 100V

One channel 70V, the other 100V

BRIDGED MONO OPERATION

140V or 200V

Amplifier settings: To minimize transformer saturation, we recommend always using the amplifier’s 75 Hz input filters. We also

recommend using the clip limiters in most applications. See the amplifier user’s manual for instructions on configuring filters and

clip limiters, as well as configuring the CX 302 for stereo, parallel, or bridged mono operation.

Connecting outputs

Turn off the amplifier before opening the safety shroud over the output barrier strip or making any changes to the output connections. Always close the safety shroud when you finish working on the output connections and before turning the amplifier on. The illustrations at right will help you identify the correct output terminals for your distributed line.

Use fully insulated wiring that conforms with local and national electrical and safety codes. Wiring for circuit classes listed below are as specified by the 1999 National Electrical Code, which is prevalent in the United States. Codes in your location may vary.

25-VOLT LINE

Connect the 25-volt distributed line across the 70V and 100V terminals. Use wiring suitable for a Class 2 circuit.

70-VOLT LINE

Connect the 70-volt distributed line across the COM and 70V terminals. Use wiring suitable for a Class 2 circuit.

100-VOLT LINE

Connect the 100-volt distributed line across the COM and 100V terminals. Use wiring suitable for a Class 2 circuit.

140-VOLT LINE (BRIDGED MONO)

Connect a jumper wire between the COM terminals of Channel 1 and Channel 2. Connect the 140-volt distributed line across the 70V terminals of Channel 1 and Channel 2. Use wiring suitable for a Class 3 circuit.

200-VOLT LINE (BRIDGED MONO)

Connect a jumper wire between the COM terminals of Channel 1 and Channel 2. Connect the 200-volt distributed line across the 100V terminals of Channel 1 and Channel 2. Use wiring suitable for a Class 3 circuit.

COM

 

70V

25V line

100V

 

COM

70V line

70V

 

100V

 

COM

 

70V

100V line

100V

 

COM

 

70V

 

100V

140V line

100V

 

70V

 

COM

 

COM

 

70V

 

100V

200V line

100V

 

70V

 

COM

 

SCHEMATIC

100V

Ch. 1 + out

70V

Ch. 1 - out

COM

100V

Ch. 2 + out

70V

Ch. 2 - out

COM

QSC Audio Products, Inc. 1675 MacArthur Blvd., Costa Mesa, California 92626 USA

Phone: (714) 754-6175 Fax: (714) 754-6174 Technical Services phone: (714) 957-7150 Technical Services fax: (714) 754-6173

www.qscaudio.com

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QSC Audio IT-42 manual Configuration, Schematic, Connecting outputs

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.