Shure

Shure SLXD2/SM58=-G58 Digital Wireless Handheld Microphone

Name: Shure SLXD2/SM58=-G58 Digital Wireless Handheld Microphone
Brand: Shure
SKU: SLXD2/SM58=-G58

The SM58 capsule's battle-tested vocal presence meets 24-bit digital transparency — wireless stage performance without compromise at 330-foot range.

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Overview

The Shure SLXD2/SM58 brings the live sound industry's most field-tested vocal microphone capsule into a modern digital wireless platform without asking you to trade the sonic familiarity you've built into your workflow. The SM58's cardioid dynamic capsule — its characteristic presence lift centered around 5–10 kHz, its tight off-axis rejection, its ability to take close-mic proximity without low-end breakup — behaves identically here. What changes is the signal path: instead of a cable, the capsule's output is encoded at 24-bit / 48 kHz and transmitted to the SLX-D receiver. The difference from legacy analogue FM wireless is audible in the first pass — the noise floor is simply absent, and the 120 dB dynamic range means nothing gets compressed on the way to your console.

The SLXD2 transmitter body is built to Shure's touring standards — the plastic housing is lightweight without feeling fragile, and the IR Sync pairing system takes seconds to execute even in a crowded production environment. Up to 10 compatible systems per 6 MHz TV band means the SLXD2 integrates into large wireless rigs without the coordination overhead of older frequency-agile systems. For broadcast, live performance, or corporate AV — any application where the SM58's proven vocal character needs to operate untethered — the SLXD2 removes the cable without adding the compromises that once made wireless a necessary evil rather than a preferred option.

Key Features

WIRELESS FREQUENCY BAND SELECTION: Before purchasing, please ensure that the wireless frequency band you select works in your area (refer to Shure website for details > search Shure Wireless Frequency Finder).

COMPONENT ONLY: For this SLXD2 digital wireless transmitter to work, please make sure it matches the frequency band (style) on your SLX-D receiver.

WHAT'S IN THE BOX: (1) SLXD2 handheld transmitter with the legendary SM58 cardioid dynamic microphone capsule, (1) zippered bag and (2) AA batteries

DIGITAL WIRELESS TECHNOLOGY: Digital predictive switching diversity. 44 MHz tuning bandwidth (region dependent). 32 available channels per frequency band (region dependent). Up to 10 compatible systems per 6MHz TV band; 12 systems per 8 MHz band. RF Scan and IR Sync to quickly find an open frequency and link the transmitter to a SLX-D receiver. Easy pairing of transmitters and receivers over IR scan and sync.

BATTERY LIFE: Up to 8 hours from 2 AA batteries. Upgrade to the optional Shure SB903 Lithium-ion rechargeable battery to monitor battery charge status in hours and minutes, as well as battery life and health statistics.

SOUND QUALITY: Crystal clear 24-bit / 48 kHz digital audio. Extended 20 Hz to 20 kHz frequency response (microphone dependent) for natural and clear sound. Stable digital RF signal transmission. 120 dB dynamic range - excellent for vocals & acoustic and wind instruments.

OPERATING RANGE: 330-feet (100-meters).

APPLICATIONS: A variety of compatible microphone/instrument cable choices guarantees the right solution for a wide range of applications, from day-long presentations to nighttime performances.

LEGENDARY SHURE ENGINEERING: Durable and ergonomic plastic transmitter construction.

Specifications

Microphone Capsule

SM58 Cardioid Dynamic

Wireless Technology

SLX-D Digital Wireless

Audio Quality

24-bit / 48 kHz Digital

Frequency Response

20 Hz – 20 kHz

Dynamic Range

120 dB

Operating Range

330 ft (100 m)

Battery Life

Up to 8 hours (2x AA)

Tuning Bandwidth

44 MHz (region dependent)

Available Channels

32 per frequency band (region dependent)

Frequency Band

G58

Transmitter Construction

Plastic (ergonomic)

Included

SLXD2 transmitter, zippered bag, 2x AA batteries

Frequently Asked Questions

Does this transmitter require a matched SLX-D receiver, and how do I pair them?

Yes — the SLXD2 is a transmitter only and will not function without a compatible SLX-D series receiver set to the same frequency band. Pairing is handled via IR Sync: point the transmitter's IR window at the receiver's IR port, initiate sync, and the receiver locks the channel automatically. The system also includes RF Scan to find open frequencies in congested RF environments before you commit to a channel.

What does 24-bit / 48 kHz digital transmission actually mean for the signal I'm hearing?

It means the digital audio path preserves the full dynamic content of the SM58 capsule with no companding artifacts — a common limitation of older analogue FM wireless systems that would compress and expand audio to fit the RF carrier. The 120 dB dynamic range means quiet vocal passages and loud peaks are both reproduced cleanly, and there's no audible noise floor pumping or frequency smear that used to be accepted as the cost of going wireless.

How does the SM58 capsule's cardioid polar pattern perform on a wireless transmitter vs. a wired mic?

The capsule behavior is identical — the SM58's tight cardioid pattern provides the same feedback rejection and proximity effect characteristics it does wired. The key difference is the signal path: on the SLXD2, the capsule feeds into a digital encoder rather than a cable. If you know the SM58's on-axis sweet spot and its off-axis rejection from wired use, your monitoring and feedback management techniques apply directly.

How should I stage gain on the SLXD2 transmitter going into my mixer?

Set transmitter gain so that peak vocal levels peak at around -10 to -6 dBFS on the transmitter's indicator — leaving headroom for unexpected dynamic spikes without clipping the A/D converter. The receiver's output level then feeds your console's mic or line input; most engineers run the receiver at 0 dB output and trim at the console for normal gain staging practice.

What battery options are available and how reliable is the 8-hour runtime?

Two AA alkaline batteries provide up to 8 hours of rated runtime. For critical performances where charge visibility matters, the optional Shure SB903 lithium-ion rechargeable battery reports remaining time in hours and minutes rather than a bar indicator — a meaningful workflow upgrade for touring engineers who need accurate estimates before a set.

Strengths & Trade-offs

👍 Pros

24-bit / 48 kHz digital audio transmission eliminates the companding artifacts and noise floor pumping that plagued analogue FM wireless — what reaches your console is clean and uncolored.
The SM58 capsule's proven cardioid pattern and presence peak translate identically in the wireless format — no relearning mic technique or EQ curves if you're already working with SM58s in your rig.
120 dB dynamic range handles the extremes of live vocal performance — from whispered passages to screamed peaks — without audible clipping or noise-floor intrusion.
Digital predictive switching diversity and 44 MHz tuning bandwidth give RF stability in dense wireless environments like festival stages or hotel ballrooms with heavy RF traffic.
8-hour battery life on standard AA cells keeps consumables simple and predictable on multi-show touring runs.

👎 Cons

This is a transmitter-only purchase — the price does not include the SLX-D receiver, which is a significant additional cost that must be factored into system budgeting.
The SM58 capsule is the only capsule option for this transmitter body; engineers who prefer a different polar pattern or condenser character for specific vocal applications need to look at alternative SLXD2 capsule configurations or a different system entirely.
Frequency band selection is region-locked and must be verified before purchase — receiving units and transmitters must match bands exactly, and buying the wrong band for your country renders the system unusable.
Plastic transmitter construction, while durable for most stage use, does not have the road-worn confidence of metal-bodied alternatives at higher price points.
The AA battery format, while convenient, means no onboard USB-C charging — touring engineers must manage battery stock rather than simply plugging in overnight.

Shure SLXD2/SM58=-G58 Digital Wireless Handheld Microphone

Overview

Key Features

Specifications

Frequently Asked Questions

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