Shure ADX2TA/SM58=-X55 Digital Handheld Wireless Microphone Transmitter with SM58 Capsule (X55: 941 to 960 MHz) (TAA-Compliant)

Product Overview

The Shure ADX2TA/SM58=-X55 is a TAA-compliant Axient Digital handheld wireless transmitter equipped with the industry-standard SM58 cardioid dynamic vocal capsule, operating in the X55 frequency band (941–960 MHz). The X55 band is licensed 900 MHz spectrum that is largely free from TV broadcast interference in most US markets, making it a strong frequency coordination choice for urban government facilities, convention centers, and commercial campuses where the lower UHF bands are congested. This transmitter integrates with any X55-band Axient Digital receiver for a complete enterprise wireless microphone system.

Product Description

The ADX2TA/SM58=-X55 provides the full Axient Digital RF platform in the 941–960 MHz X55 band: ShowLink remote control via IEEE 802.15.4, AES 256-bit encryption, High Density mode, and selectable RF power output. The SM58 cardioid dynamic capsule is a proven choice for government and commercial AV environments where presenters have variable microphone technique — it handles high SPL without distortion, requires no phantom power, and delivers consistent cardioid pickup across all use conditions. For the G57-band equivalent of this transmitter, see the Shure ADX2TA/SM58=-G57. For an X55-band transmitter with condenser capsule, see the Shure ADX2TA/K9B=-X55.

High Density mode reduces channel spacing to 125 kHz for significantly increased simultaneous channel capacity. The SB920 Li-Ion battery delivers up to 9 hours of runtime at 10 mW with precision fuel-gauge metering and docked charging support.

Key Features

• TAA Compliance — Manufactured per Trade Agreements Act requirements, eligible for US federal government and GSA schedule procurement without waivers or exceptions.
• SM58 Cardioid Dynamic Capsule — Industry-standard dynamic element with consistent cardioid polar pattern, 145 dB SPL handling, and no phantom power requirement.
• X55 Frequency Band (941–960 MHz) — Licensed 900 MHz spectrum provides a largely interference-free RF environment in dense urban markets where lower UHF bands are congested.
• ShowLink Remote Control — IEEE 802.15.4 wireless management enables real-time transmitter control from the operator position without interrupting live audio.
• AES 256-Bit Encryption — Secures audio for government, legal, and enterprise security applications.
• High Density Mode — 125 kHz channel spacing maximizes simultaneous channel capacity for large commercial deployments.
• Selectable RF Power (2/10/40 mW) — Adjustable power levels optimize operating range and battery runtime for each specific venue.
• SB920 Rechargeable Li-Ion Battery — Up to 9 hours runtime at 10 mW; zero memory effect with networked docked charging.
• Cast Aluminum Construction — Commercial-grade rugged housing for professional AV environments.
• Interchangeable Cartridge System — SM58 capsule upgradeable to KSM8, KSM9, Beta 58A, or other Shure wireless cartridges without tools.

Typical Applications

• Government space
• Conference room
• Commercial meeting space
• All-hands room
• House of worship
• Auditorium
• Multi-purpose room
• Training room

Technical Specifications

Competitor Comparison

Frequently Asked Questions

Is a license required to operate the ADX2TA/SM58=-X55?
Yes. The 941–960 MHz X55 band is licensed spectrum in the US. Operators must obtain an FCC license before deploying this transmitter. Work with your AV integrator or a licensed frequency coordinator to identify the appropriate license class and frequency allocation for your facility.

What receiver is required for the X55 band?
This transmitter requires an Axient Digital receiver operating in the X55 band. Confirm that your receiver model supports X55 before ordering, and verify frequency band compatibility with your system designer.

Is this eligible for US federal government procurement?
Yes. The "TA" designation confirms TAA compliance. This transmitter is eligible for US federal contracts and GSA schedule purchases.

Why choose the SM58 capsule for a government AV deployment?
The SM58 is a proven dynamic capsule that requires no phantom power, handles high SPL without overload, and performs predictably across a wide range of presenter technique. For government meeting rooms and conference spaces where presenters are not trained audio engineers, the SM58 offers reliable pickup without the sensitivity or handling requirements of condenser capsules.

What warranty does this product carry?
Shure provides a two-year limited warranty on the ADX2TA transmitter body and a one-year limited warranty on the SB920 battery.