Shure BLX288/SM58-H11 Dual Wireless SM58 Microphone System

The Shure BLX288/SM58-H11 is a dual-channel UHF wireless vocal system built for two performers, presenters, hosts, or speakers who need dependable handheld microphone coverage from one receiver. It pairs a BLX88 dual-channel receiver with two BLX2 handheld transmitters fitted with integrated SM58 microphone capsules. The H11 version operates in the 572–596 MHz frequency band, so buyers should confirm that this band is authorized and practical for use in their location.

This system helps simplify two-microphone setups for live music, houses of worship, meetings, karaoke, education, and event sound. Each transmitter can run for up to 14 hours on a pair of AA alkaline batteries, reducing interruptions during long programs. With a stated line-of-sight operating range of up to 300 feet, it provides flexible placement for many stage and presentation environments.

The integrated SM58 capsules are designed for vocals and speech, using a cardioid pickup pattern to focus on the intended source while reducing pickup from the sides and rear. Their vocal-oriented response helps deliver intelligible spoken word and clear live vocal reproduction. The BLX2 transmitters also include a selectable -10 dB attenuation setting for louder voices or sources that may otherwise overload the system.

Shure's BLX platform uses one-touch QuickScan frequency selection to help locate an available frequency when setting up the receiver. The BLX88 uses microprocessor-controlled internal antenna diversity and separate audio status LEDs for its two channels. Green audio indication shows normal signal levels, while red indicates excessive levels that may require gain adjustment.

The BLX288/SM58-H11 is a self-contained front end for a PA system, powered speaker, mixer, or installed sound setup. Its BLX88 receiver provides XLR microphone-level and 1/4-inch instrument-level output connections for integration with compatible audio equipment. For expanding wireless setups, the BLX platform can support up to 12 compatible systems per frequency band, with real-world channel count depending on region and RF conditions.

Key Features

• Dual-Channel Wireless Operation: Runs two BLX2/SM58 handheld transmitters through one BLX88 receiver.
• H11 UHF Frequency Band: Operates from 572 to 596 MHz where authorized.
• Integrated SM58 Capsules: Delivers cardioid vocal pickup for speech and singing applications.
• Up To 14-Hour Battery Life: Each transmitter uses two AA alkaline batteries.
• QuickScan Frequency Selection: Helps find an available operating frequency during setup.
• Flexible Audio Outputs: Receiver includes XLR and 1/4-inch output connections.

Design & Installation

The BLX88 receiver and BLX2 transmitters use molded ABS housings designed for portable wireless operation. The handheld transmitters have an integrated microphone-capsule design, battery-status indication, group and channel controls, and removable identification caps. The receiver uses clear LED status indicators and a front-panel display for group and channel settings.

Connect the BLX88 receiver to its supplied external power supply, then connect its XLR or 1/4-inch output to a compatible mixer, amplifier, powered speaker, or other audio input. Perform a group scan on the receiver, then set each transmitter to the corresponding group and channel before use. Maintain line of sight where possible, keep transmitters within the stated operating range, and verify local H11-band frequency compliance before deployment.