Shure ADX2TA/SM58=-K54 Digital Handheld Wireless Microphone Transmitter with SM58 Capsule (K54: 606 to 663 MHz) (TAA-Compliant)

Product Overview

The Shure ADX2TA/SM58=-K54 is a TAA-compliant Axient Digital handheld wireless transmitter equipped with the industry-standard SM58 cardioid dynamic vocal capsule, operating in the K54 frequency band (606–663 MHz). This transmitter pairs the proven reliability of the SM58 with the full enterprise RF management capabilities of the Axient Digital platform, including ShowLink remote control, AES 256-bit encryption, and High Density mode. It is designed for US federal government procurement and commercial AV deployments where K54 band operation is required due to spectrum availability or facility licensing.

Product Description

The K54 band (606–663 MHz) provides an alternative UHF frequency allocation where the G57 band (470–616 MHz) is congested or where facility licensing dictates specific frequency use. The ADX2TA/SM58=-K54 delivers the same Axient Digital RF platform as all ADX2 variants: 184 MHz platform tuning range, ShowLink remote management via IEEE 802.15.4, AES 256-bit encryption, and High Density mode for high channel-count commercial deployments. The SM58 cardioid dynamic capsule is a low-maintenance choice for conference rooms and government spaces where presenters have varying microphone technique — it handles high SPL, requires no phantom power, and provides consistent cardioid pickup. For the G57-band equivalent, see the Shure ADX2TA/SM58=-G57. For a condenser capsule alternative on the Axient platform, see the Shure ADX2/B58.

High Density mode reduces channel spacing to 125 kHz for maximum simultaneous channel capacity. The SB920 rechargeable Li-Ion battery provides up to 9 hours of runtime at 10 mW.

Key Features

• TAA Compliance — Manufactured per Trade Agreements Act requirements, eligible for US federal government and GSA schedule procurement without exceptions.
• SM58 Cardioid Dynamic Capsule — Industry-standard dynamic capsule with consistent cardioid polar pattern, high SPL handling, and no phantom power requirement.
• K54 Frequency Band (606–663 MHz) — UHF alternative to G57 for facilities where lower UHF spectrum is congested or unavailable.
• ShowLink Remote Control — IEEE 802.15.4 wireless management link enables real-time parameter adjustments from the operator position without interrupting live audio.
• AES 256-Bit Encryption — Secures audio for government, legal, and sensitive enterprise applications.
• High Density Mode — 125 kHz channel spacing for maximum simultaneous channel count in large commercial deployments.
• Selectable RF Power (2/10 mW above 608 MHz) — FCC regulations limit output to 10 mW above 608 MHz in the K54 band; sufficient for most commercial building deployments.
• SB920 Rechargeable Li-Ion Battery — Up to 9 hours runtime at 10 mW with precision fuel-gauge metering and networked docked charging.
• Cast Aluminum Construction — Rugged, lightweight housing for commercial AV professional use.
• Interchangeable Cartridge System — SM58 capsule can be swapped for any compatible Shure wireless cartridge 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

When should I choose K54 over G57 for a commercial AV deployment?
The K54 band (606–663 MHz) may be cleaner than G57 in markets where TV broadcast channels occupy the lower UHF band. A pre-installation RF site survey using Shure Wireless Workbench spectrum analysis is the recommended way to determine the optimal frequency band for your specific location.

What receiver is required?
This transmitter requires a K54-band Axient Digital receiver. The frequency band of the transmitter and receiver must match for the system to function.

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

Does the power restriction above 608 MHz affect range in a typical building deployment?
For most commercial meeting rooms and conference facilities, 10 mW provides adequate operating range — the specified 100-meter (300-foot) line-of-sight range is typically more than sufficient for indoor AV installations. Consult your RF engineer or integrator if your facility has unusual geometry or high RF absorption requirements.

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.