Whirlwind QBOX Audio Line Tester/Test Tone Generator

All-in-One Audio Line Tester for Live Sound and Install Work

The Whirlwind QBOX is a compact, battery-powered audio testing device designed for fast diagnostics in live sound, studio, and AV installation environments. Whether you're chasing a signal down a snake, verifying phantom power, or checking line integrity, the QBOX gives you everything you need in one rugged, portable unit. It’s equipped with a mic, speaker, test tone generator, and multiple I/O ports, making it a go-to tool for audio techs on the move.

Verify Audio Lines with Built-In Microphone and Speaker

With a built-in condenser microphone and internal speaker, the QBOX allows users to listen and speak directly through XLR and other connections without requiring additional gear. This makes it ideal for monitoring active mic lines or intercom feeds in real time. The onboard speaker also lets you quickly verify return signals, while the mic helps confirm open channels or dead lines in seconds.

Generate Test Tones for Signal Path Troubleshooting

The QBOX includes an internal test tone generator that outputs a line or mic level signal to XLR and 1/4-inch outputs. This feature helps you trace audio cables through patch bays, identify individual lines in bundles, or confirm routing through mixing consoles and processors. A tone/internal switch determines whether the outgoing signal is the test tone or live audio from the onboard mic.

Multiple Connectivity Options for Professional Workflows

This utility tester offers XLR, 1/4", and 3.5mm connections, making it compatible with a wide range of professional audio gear. It can send and receive signals, work in loopback mode, daisy-chain to other devices, or even be used as a basic hands-free intercom when connected to another QBOX. A stereo headphone jack allows silent monitoring and automatically disables the internal speaker when used.

Visual Indicators for Phantom and Intercom Voltage Detection

The QBOX is equipped with LED indicators that show the presence of phantom power or intercom voltage on connected lines. These indicators eliminate guesswork, helping you avoid connecting sensitive gear to active phantom lines or identifying powered circuits during setup. It’s a crucial safeguard when working with delicate microphones or dynamic signal chains.

Compact and Rugged Design for Field Use

Built into a durable ABS plastic housing, the QBOX is made to withstand the rigors of touring, outdoor shows, and fast-paced installations. A built-in belt clip allows for hands-free operation, and the compact form factor fits easily into tool bags or tech kits. It’s powered by a single 9V battery, making it fully mobile and ideal for on-the-spot problem solving without access to AC power.

Flexible Utility for Intercom and Talkback Monitoring

In addition to tone generation and line testing, the QBOX can serve as a compact monitoring solution for 3-wire intercom systems, letting you hear talkback from FOH or other crew positions. It provides up to 60dB of gain through its built-in amp and includes a volume control for both the speaker and headphone output, giving you complete control over monitoring levels.