QSC IT-42 – Output Isolation Transformer for CX302 is backordered and will ship as soon as it is back in stock.
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Product Overview
The QSC IT-42 is an output isolation transformer accessory for the QSC CX302 power amplifier, enabling it to drive constant-voltage distributed loudspeaker lines. With the IT-42 installed, the CX302 can power two 25-, 70-, or 100-volt lines in stereo or parallel, or a single 140- or 200-volt line in bridged mono — making it a flexible solution for commercial distributed audio systems. The transformer mounts directly to the back of the amplifier and requires no additional rack space.
Product Description

Constant-voltage (70V/100V) distribution is the standard for paging and background-music systems that span many loudspeakers across a large building. The IT-42 converts the low-impedance output of the CX302 into selectable 25/70/100-volt distributed lines, or a higher 140/200-volt line when the amplifier is bridged, without consuming extra rack units. Because it attaches to the amplifier chassis, it preserves the CX302's compact footprint while adding distributed-line capability for installed commercial systems.
Key Features
- Output isolation transformer for the QSC CX302 — Adds constant-voltage distribution to a low-impedance amplifier.
- Multiple line voltages — Two 25/70/100 V lines in stereo or parallel, or one 140/200 V line in bridged mono.
- No added rack space — Mounts directly to the rear of the amplifier.
- Commercial distributed audio — Suited to multi-zone paging and background-music systems.
Typical Applications
- Commercial meeting space
- House of worship
- Multi-purpose room
Technical Specifications
| Type | Output isolation transformer accessory |
| Host amplifier | QSC CX302 |
| Stereo / parallel output | Two 25 / 70 / 100 V lines |
| Bridged mono output | Single 140 / 200 V line |
| Mounting | Attaches to rear of amplifier; no added rack space |
Frequently Asked Questions
Which amplifier is the IT-42 designed for? The QSC CX302. It converts the CX302's low-impedance output to constant-voltage distributed lines.
What line voltages does it support? Two 25/70/100 V lines in stereo or parallel, or a single 140/200 V line when the amplifier is bridged to mono.
Does it require extra rack space? No — it mounts directly to the back of the amplifier.
What about warranty and support? Coverage follows QSC's published warranty terms. Contact Creation Networks support for compatibility questions.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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