Shure ADX2FD/SM58 – Frequency Diversity Handheld Wireless Transmitter

Product Overview

The Shure ADX2FD/SM58 wireless microphone transmitter is built for broadcast, house of worship, and large-venue commercial installations where a dropped RF link is not an option. As part of the Axient Digital wireless microphone system, this frequency diversity wireless microphone system transmits audio simultaneously on two independent RF carriers, so a single interference event does not interrupt the program feed. Paired with ShowLink remote control, AV engineers can adjust gain, frequency, mute, and RF power from a control booth without touching the handheld. The result is a commercial-grade wireless handheld transmitter suited to any facility that cannot tolerate downtime during a live broadcast or service.

Product Description

The ADX2FD/SM58 pairs the industry-standard SM58 cardioid capsule with Shure's most advanced wireless transmission architecture. For integrators specifying a dual RF carrier wireless vocal microphone for a permanent install, this transmitter's frequency diversity mode keeps audio uninterrupted even in RF-congested downtown cores, convention centers, and multi-tenant office buildings. The transmitter supports Standard, High-Density, and High-Power operating modes, giving system designers flexibility to prioritize channel count in a high-density wireless mic deployment or extend coverage up to 50 mW output in larger rooms and auditoriums.

Housed in a moisture-resistant aluminum body, the ADX2FD/SM58 is engineered for the wear and tear of daily use in commercial meeting spaces, training rooms, and broadcast studios alike. The rechargeable SB920 Li-Ion battery delivers up to 9 hours of runtime in single-carrier mode or 6.5 hours in frequency diversity mode, and dock-charging contacts let facilities staff drop the transmitter into a networked charger between uses without unscrewing a battery door. A backlit LCD display and user lockouts prevent accidental changes to frequency or gain settings during a live event.

Because the ADX2FD/SM58 operates within the Axient Digital ecosystem, it integrates with existing ADX-series receivers, ShowLink access points, and Wireless Workbench software already deployed in a commercial-grade wireless handheld transmitter installation. AES-256 encryption keeps program audio secure end to end, an important consideration for government facilities and corporate boardrooms handling sensitive proceedings. Integrators replacing legacy analog handhelds will find the SM58 capsule delivers the same familiar vocal tone their end users expect, while the frequency diversity wireless microphone system underneath solves the RF reliability problems analog systems cannot.

Key Features

• Frequency Diversity — Two simultaneous RF carriers eliminate dropout-free audio interruptions during live events.
• ShowLink Remote Control — Adjust RF power, frequency, gain, and mute in real time from a booth or rack room.
• SM58 Dynamic Capsule — Delivers the industry-standard cardioid vocal sound integrators and presenters already trust.
• Selectable Transmission Modes — Standard, High-Density, and High-Power (up to 50 mW) modes match output to venue size.
• Interchangeable Capsule Design — Compatible with multiple Shure capsules for future audio flexibility without replacing the transmitter.
• Durable Aluminum Housing — Moisture-resistant construction withstands daily handling in commercial and touring environments.
• Rechargeable SB920 Battery — Up to 9 hours single-carrier or 6.5 hours frequency-diversity runtime with dock-charging contacts.
• AES-256 Encryption — Secures wireless audio transmission for government, corporate, and broadcast deployments.
• Backlit LCD with Lockouts — Prevents accidental setting changes during a live broadcast or service.

Typical Applications

• House of worship
• Government space
• Commercial meeting space
• Multi-purpose room
• All-hands room
• Broadcast studio
• Auditorium

Technical Specifications

Frequently Asked Questions

• Is the ADX2FD/SM58 compatible with existing Axient Digital receivers? Yes. It is designed to operate within the Axient Digital wireless system alongside compatible ADX-series receivers; confirm matching frequency bands before ordering.
• Can the SM58 capsule be swapped for another Shure capsule? Yes, the ADX2FD transmitter body accepts multiple interchangeable Shure capsules, letting integrators standardize on one transmitter platform across a facility.
• Does this transmitter require a ShowLink access point for remote control? Real-time remote adjustment of frequency, gain, and mute requires a ShowLink-enabled access point on the network; the transmitter still functions for standard RF transmission without one.
• What battery and charging accessories are required for install? The transmitter uses the rechargeable SB920 battery and can be paired with networked dock chargers for facilities managing multiple handhelds.
• Is this transmitter suitable for permanent installation in a house of worship or auditorium? Yes, the frequency diversity design and durable aluminum housing make it well suited to fixed installations as well as touring use.
• What warranty and support does Shure provide? The ADX2FD/SM58 carries Shure's standard manufacturer warranty; contact Creation Networks for AV system design and integration support.
• Does frequency diversity mode reduce battery life? Yes, transmitting on two RF carriers simultaneously reduces runtime to approximately 6.5 hours versus 9 hours in single-carrier mode.