Shure ADX2/SM58 – Axient Digital Handheld Transmitter, X55 Band 941-960 MHz

Product Overview

The Shure ADX2/SM58 is a handheld wireless microphone transmitter built for commercial AV deployments that need reliable RF performance outside the standard UHF broadcast bands. This unit is configured for the X55 frequency band, covering 941–960 MHz, an allocation used in a number of regions for ISM-band or license-exempt wireless microphone operation, making it a practical option for integrators sourcing equipment for international venues or facilities where UHF spectrum is congested or restricted. It pairs the legendary SM58 cardioid dynamic capsule with Shure's Axient Digital wireless platform, giving AV professionals the vocal clarity they already specify for presentation and house-of-worship audio, backed by AES-256 encrypted transmission and ShowLink remote control. It is intended for integrators, procurement teams, and AV system designers who need a handheld transmitter matched to a specific regional frequency plan rather than a generic UHF band.

Product Description

This ADX2/SM58 handheld wireless transmitter is built on the same Axient Digital platform used across Shure's professional line, but configured for the X55 band (941–960 MHz) rather than the 470–616 MHz or 606–663 MHz UHF bands used in most North American installations. For AV integrators managing multi-region deployments, ordering the correct band is not optional: transmitters and receivers in an Axient Digital system must be matched to the same frequency range to operate together, and bands cannot be mixed within a single wireless system.

The SM58 cardioid dynamic capsule mounted on this transmitter delivers the same off-axis rejection and consistent vocal reproduction integrators already rely on for boardrooms, houses of worship, and broadcast studios, now carried over digital wireless transmission instead of an analog RF link. Two selectable transmission modes — Standard and High Density — let a system designer trade coverage for total channel count depending on how many wireless systems need to coexist in the same RF environment.

ShowLink remote control gives an AV technician or operator real-time access to gain, mute, and channel assignment from a compatible Axient Digital receiver without physically handling the transmitter, which matters in touring, government, and broadcast environments where the microphone stays in a presenter's or performer's hand throughout an event. The cast aluminum housing and moisture-resistant construction are built to commercial-grade durability standards, and the transmitter runs on a Shure SB920 rechargeable Li-Ion battery rated for up to nine hours of continuous operation at 10 mW output.

RF output on the X55 band is selectable between 2, 10, and 40 mW, giving integrators flexibility to balance battery life against transmission range and RF density in the room. Because 941–960 MHz sits outside the crowded UHF television broadcast spectrum, this band configuration is a practical fit for procurement teams sourcing equipment for facilities in regions where UHF wireless microphone allocations are limited, licensed differently, or unavailable. As with all Axient Digital transmitters, this unit requires a frequency-matched X55-band Axient Digital receiver — confirm compatible receiver models and local spectrum regulations with your AV equipment supplier before specifying this transmitter for a project.

Key Features

• SM58 Cardioid Dynamic Capsule — Delivers the clear, present vocal tone and off-axis rejection integrators already specify for live and presentation audio.
• X55 Frequency Band (941–960 MHz) — Operates outside the standard UHF wireless microphone bands, suited to regions and facilities where UHF spectrum is congested, restricted, or unavailable.
• Axient Digital Wireless Platform — Provides the interference protection and RF stability of Shure's flagship digital wireless system in a handheld form factor.
• Selectable RF Output Power — 2, 10, or 40 mW output lets integrators balance operating range against battery runtime and RF density.
• ShowLink Remote Control — Enables real-time remote adjustment of gain, mute, and channel settings from a compatible Axient Digital receiver.
• Standard and High Density Transmission Modes — Optimizes either coverage or total channel count depending on how many wireless systems share the RF environment.
• AES-256 Digital Encryption — Secures the wireless audio path for confidential meetings, government use, and broadcast applications.
• Rechargeable SB920 Li-Ion Battery — Up to nine hours of runtime at 10 mW output, with battery status reporting to a compatible receiver.
• Cast Aluminum, Moisture-Resistant Housing — Commercial-grade construction built to withstand daily handling in demanding AV environments.

Typical Applications

• Boardroom
• Conference Room
• House of Worship
• Government Space
• Commercial Meeting Space
• Multi-Purpose Room
• All-Hands Room
• Training Room
• Auditorium
• Broadcast Studio

Technical Specifications

Frequently Asked Questions

Is the ADX2/SM58 X55 band compatible with G57 or K54 band equipment?
No. Axient Digital transmitters and receivers must be matched to the same frequency band to operate together. A 941–960 MHz (X55) transmitter will not link with a G57 (470–616 MHz) or K54 (606–663 MHz) receiver. Confirm that every transmitter and receiver in your system order shares the same band designation before specifying a project.

Which receiver does this transmitter require?
It requires an Axient Digital receiver tuned to cover the X55 range, such as a "C" band receiver variant (750–960 MHz). Confirm the exact receiver model and band with your AV equipment supplier, since Shure's Axient Digital receivers are sold in region- and band-specific configurations.

Does this transmitter require a license to operate in the X55 band?
Regulatory requirements for the 941–960 MHz range vary by country and can change over time. Confirm current licensing or ISM-band eligibility requirements for your specific location with your local telecommunications authority or an authorized Shure dealer before deploying this transmitter.

How does this transmitter integrate into an existing AV system?
The ADX2/SM58 outputs audio through a paired Axient Digital receiver, which can feed a DSP, mixer, or conferencing codec via analog XLR, AES3, or Dante, depending on the receiver model. ShowLink remote control also allows integration with Wireless Workbench for centralized monitoring and control alongside other Axient Digital devices in the same facility.

What is the battery runtime and how is the transmitter charged?
The transmitter runs on a Shure SB920 rechargeable Li-Ion battery rated for up to nine hours at 10 mW RF output. It can be charged in a compatible Shure SBC240 networked docking charger designed for ADX1/ADX2 transmitters and SB910/SB920 batteries, or with a spare SB920 replacement battery.

What warranty does Shure provide on this transmitter?
Shure covers wireless systems and components under a standard one-year limited warranty from the original date of purchase, with an optional three-year extended warranty available for up to five years of total coverage. Refer to Shure's published warranty terms for full details.

Who should I contact for support or system design help?
Contact your AV integrator or procurement contact at Creation Networks for help confirming band compatibility, receiver pairing, and system design before ordering. Because this is a band-specific SKU, verifying compatibility with existing house inventory before purchase will prevent costly frequency mismatches.