SHURE / SLX-D+ Plug-On Transmitter, JB Band

The SLX-D+ is a high-performance wireless system offering versatile configurations from rack-mounted to portable solutions, adapting to a wide range of applications such as stages and theaters, while enabling hands-free monitoring and management. (Available March 2026)

Professional-Trusted Quality for Everyone

Delivers clear 24-bit digital audio with a dynamic range exceeding 118 dB

Automatic setup — once linked, the SLX-D+ receiver and transmitter maintain their connection even in the presence of RF interference

ShowLink® Ease enables wireless remote adjustment of transmitter parameters directly from the linked receiver

Adjustable parameters include:

Changing the transmitter frequency when an available frequency is detected

Output level adjustment

Transmitter lock and unlock

Transmitter firmware updates

RF status monitoring and parameter control via Wireless Workbench® or the WWB Mobile app
(WWB Mobile supports operation via Wi-Fi or Bluetooth)

All SLX-D+ receivers feature Shure’s patented Digital Feedback Reducer (DFR), which automatically reduces unwanted feedback if it occurs

AES-256 encryption is standard across all SLX-D+ components and systems, ensuring secure operation

Powered by two AA batteries (included) or an optional Shure SB903 rechargeable lithium-ion battery and charging accessories for maximum operating time

Product Overview

The SLXD3+ plug-on transmitter introduces a new hands-free workflow for monitoring and management, designed for experienced production staff and professional engineers.
With a wide tuning range, SLXD+ transmitters and receivers remain continuously synchronized via the dedicated ShowLink® Ease control link, delivering high-quality wireless performance in any environment.

The system manages interference, scans for new channels, and automatically optimizes settings for clear transmission. Monitoring and configuration from paired mobile devices are also supported.

Converts any XLR source for use within the SLX-D wireless system

Supports condenser microphones with built-in phantom power (+12 V / +48 V)

Patented locking XLR connector prevents accidental disconnection

Specifications

Operating Range: 100 m
(Note: Actual range depends on RF signal absorption, reflection, and interference)

RF Tuning Step Size: JB Band: 125 kHz

Image Rejection: >85 dB (typical)

RF Sensitivity: –97 dBm at 10⁻⁵ BER

Latency: 2.8 ms

High-Pass / Low-Cut Filter: 160 Hz, 12 dB/octave
(Note: HPF is off by default at factory settings)

Frequency Response: 20 Hz – 20 kHz (+1, –2 dB)

Automatic Dynamic Range (A-weighted, 20 Hz – 20 kHz, typical): 118 dB at 1% THD

THD (Total Harmonic Distortion): <0.02%

System Audio Polarity:
Positive pressure on the microphone diaphragm produces a positive voltage on pin 2 relative to pin 3 of the XLR output, and on the tip of the TRS output.
For TRS: positive pressure produces a positive voltage on the 6.35 mm (1/4") tip relative to the ring terminal.

Mic Offset Range: 0 to 21 dB (3 dB steps)

Operating Temperature Range: –18 °C to 50 °C (0 °F to 122 °F)

Storage Temperature Range: –29 °C to 74 °C (–20 °F to 165 °F)

Physical Characteristics & Power

Battery Type: Rechargeable lithium-ion battery or AA (1.5 V) batteries

Dimensions (Diameter × Length): 126 × 41 × 41 mm (4.9 × 1.6 × 1.6 in)

Weight: 200 g (7.0 oz)

Housing: Aluminum, zinc alloy, PC/ABS

Audio & RF Performance

Connector: XLR

Maximum Input Level (1 kHz, 1% THD):

Pad –12 dB: 20.5 dBV

0 dB: 8.5 dBV

Boost +12 dB: –3.5 dBV
(Note: Depends on microphone type)

Phantom Power:

+48 V (max. 7 mA)

+12 V (max. 15 mA)

Antenna Type: Dipole

Occupied Bandwidth: <200 kHz

Modulation: Shure proprietary digital modulation

RF Output Power: 1 mW / 10 mW / 30 mW
(Varies by region; refer to frequency band and output power chart)

SAR Value: <0.17 W/kg

Included Accessories & Warranty

Included Items:

SLXD3+ XLR plug-on wireless transmitter ×1

AA alkaline batteries ×2

Protective sleeve with leather belt clip

Zippered carrying pouch ×1

Country of Manufacture: China

Warranty: 2 years