Shure BLX24R/B58-H9 Wireless Rackmount Vocal System

The Shure BLX24R/B58-H9 is a single-channel UHF wireless vocal system built for performers, presenters, venues, and installed sound applications. It combines a rack-mountable BLX4R receiver with a BLX2 handheld transmitter fitted with an integrated BETA 58A vocal microphone capsule. The H9 version operates in the 512 to 542 MHz frequency band, so buyers should verify local frequency compatibility before purchase.

This system helps remove cable restrictions while providing a direct connection to a mixer, powered speaker, or sound-reinforcement system. Its stated line-of-sight operating range is up to 300 feet, allowing the vocalist or presenter more freedom to move around a stage or event space. One-touch QuickScan frequency selection helps locate an available operating frequency when interference is present.

The integrated BETA 58A capsule uses a supercardioid pickup pattern and a vocal-focused 50 Hz to 16 kHz response. Its directional pattern is intended to focus on the performer while reducing pickup from off-axis sound sources. A selectable -10 dB transmitter gain attenuation setting helps accommodate louder vocal sources when needed.

The BLX4R receiver is designed for rack-based sound systems, mobile production racks, houses of worship, schools, and small performance venues. It provides removable quarter-wave antennas, internal antenna diversity, adjustable output level, and RF/audio metering on its LCD display. Balanced XLR and unbalanced 1/4-inch outputs provide connection options for common audio equipment.

The system is a practical starting point for a wireless microphone setup and can be used alongside other BLX systems where frequency coordination permits. BLX transmitters operate for up to 14 hours from two AA alkaline batteries. Shure specifies support for up to 12 systems per frequency band, although actual channel availability depends on the region and RF environment.

Key Features

• H9 UHF Band: Operates from 512 to 542 MHz; verify local compatibility before use.
• BETA 58A Capsule: Supercardioid vocal capsule focuses pickup on the performer.
• Rack-Mount Receiver: BLX4R receiver includes hardware for rack installation.
• QuickScan Selection: One-touch scanning helps locate an available frequency.
• Dual Audio Outputs: Balanced XLR and unbalanced 1/4-inch outputs connect to sound systems.
• AA Battery Operation: Handheld transmitter runs up to 14 hours on two alkaline AAs.

Design & Installation

The BLX4R receiver uses a molded ABS and steel housing with a rack-mountable half-rack format. Its removable external quarter-wave antennas can be rear mounted or routed using the included antenna hardware. The BLX2 handheld transmitter uses a molded ABS housing and an integrated BETA 58A capsule.

Install the receiver in a rack or place it securely near the sound system, then connect its XLR balanced or 1/4-inch unbalanced output to a mixer or amplifier input. Connect the included PS24 power supply, install two AA alkaline batteries in the transmitter, and use QuickScan to select a suitable group and channel. Keep the transmitter and receiver in the same H9 frequency band, and position antennas with a clear path to the performance area where possible.