QSC IT-42 – Isolation Transformer for CX302

QSC IT-42 Isolation Transformer for CX302

The QSC IT-42 is an output isolation transformer accessory specifically designed for the QSC CX302 power amplifier. It enables the amplifier to safely drive distributed constant-voltage speaker systems by providing fully isolated 25V, 70V, and 100V outputs in stereo or parallel operation, as well as 140V or 200V operation in bridged mono mode. The unit mounts directly to the rear of the amplifier without requiring additional rack space, making it a compact and integrated solution for commercial and installed sound systems.

Key Features

• Designed exclusively for use with the QSC CX302 amplifier
• Provides fully isolated output transformer channels
• Supports 25V, 70V, and 100V distributed audio systems
• Allows dual-channel operation for stereo or parallel speaker lines
• Supports bridged mono operation for higher-voltage output (140V / 200V)
• Power handling up to:
• 400W per channel (stereo/parallel operation)
• 800W in bridged mono mode
• Pre-wired design for quick installation on the rear of the amplifier
• No additional rack space required (rear-mounted accessory)
• Designed for commercial and installed audio distribution systems
• Maintains stable output performance for long cable runs and multi-speaker setups
• Helps ensure electrical isolation between amplifier and speaker lines for system protection