Shure QLXD4-H51

QLX-D: A Shure Solution Designed for Demanding Installations and Live Performance

The QLX-D range was designed to combine deployment simplicity with performance suited to professional contexts. It is intended both for fixed installations (theaters, auditoriums, places of worship, conference centers) and for stage use in live shows and events, where RF stability and operational reliability are essential.

Thanks to its "field-oriented" approach (deployment, monitoring, security), QLX-D naturally integrates into already structured RF setups while remaining accessible for teams seeking an efficient, fast-to-use, and consistent solution across venues.

Who Is It For and What Are Its Uses?

The Shure QLX-D digital wireless system targets sound technicians, stage managers, and integrators looking for a wireless microphone system capable of delivering consistent audio quality and link stability, even in constrained RF environments. It is particularly suitable for events requiring rapid configuration changes, secure transmission, and clear system status visibility.

In installations, it meets the needs of voice reinforcement (speakers, hosts, theater, conferences) with a demand for reliability and discretion. On stage, it performs well for setups requiring efficient frequency management, high channel density, and remote monitoring to anticipate issues.

Performance, Security, and Monitoring: What Makes the Difference

Digital Audio: Precision and Dynamics Serving the Source

QLX-D is based on digital audio processing at 24-bit / 48 kHz format. The goal is clear: to preserve the fidelity and dynamics of the sound source for a more detailed and controlled reproduction. Whether for spoken voice (intelligibility) or singing (nuances, presence), this architecture contributes to a clean and coherent sound throughout the signal chain.

RF Performance: Spectral Efficiency and Stability

The robustness of the RF signal and the spectral efficiency of QLX-D optimize the use of the available spectrum. Specifically, the system can handle up to 20 frequencies within an 8 MHz TV channel, a major advantage when multiple links are needed in a limited RF space, while maintaining clear and stable operation.

256-bit Encryption: Transmission Privacy

For sensitive environments (corporate, institutional, private events, confidential speeches), QLX-D offers 256-bit encryption. This feature ensures secure transmission and limits the risk of unauthorized listening, a key point whenever audio content must remain strictly internal.

Network Control and Remote Monitoring

QLX-D is compatible with Shure Wireless Workbench 6, facilitating integration into centralized monitoring and networked system management. For operational tracking, remote monitoring is possible from an iOS device via the ShurePlus Channel app, convenient for keeping an eye on the system without staying permanently at the rack or control room.

Rechargeable Ion-Lithium Battery: Clear Autonomy and Reliable Operation

QLX-D transmitters can be powered by a rechargeable Ion-Lithium battery that displays remaining runtime in hours and minutes. This precise readout helps secure operation (planning, changes, rotation) while offering extended autonomy, a real advantage for long days, rehearsals, and consecutive shows.

Technical specifications

Category	receiver	Transmission	digital
Directional antenna	Yes	Outputs	XLR, jack
Latency	2.9 MILLISECOND	Display screen	Yes
Connection	RJ45	Accessories included	single/double rack mounting kit
Max. number of simultaneous systems	67	Weight	777 kg
Indicative range	100 m	Dimensions (mm)	41 x 197 x 151

Format	24-bit / 48 kHz	H51	534-598 MHz
Signal encryption	256-bit	K51	606-670 MHz
V51	174-216 MHz	L52	632-694 MHz
G51	470-534 MHz