Shure QLXD2/KSM9 Digital Handheld Wireless Microphone Transmitter with KSM9 Capsule (G50: 470 to 534 MHz)

Shure QLXD2/KSM9 Digital Handheld Wireless Microphone Transmitter

The Shure QLXD2/KSM9 is a premier digital handheld wireless microphone transmitter designed for compatibility with QLX-D receivers. Equipped with the advanced KSM9 condenser capsule, this transmitter captures sonic nuances with superior detail, ensuring precise vocal reproduction for high-end live performances.

Superior Sound Quality with Dual-Diaphragm KSM9 Capsule

The QLXD2/KSM9 features the renowned dual-diaphragm KSM9 condenser capsule, offering two switchable polar patterns—cardioid and supercardioid. This flexibility allows front-of-house engineers to adapt to different environments and performer techniques:

• Cardioid Pattern: Delivers solid gain before feedback with minimal off-axis coloration, producing a warm, full sound.


• Supercardioid Pattern: Provides increased sound isolation and higher gain before feedback, ideal for noisy environments or setups with multiple close-proximity sound sources.

Extensive UHF Tuning Range

Operating within a 64 MHz UHF tuning range, the QLXD2/KSM9 offers 2560 selectable frequencies, ensuring reliable performance in various settings.

• Long Battery Life: Up to 9 hours of operation on two AA batteries.


• Extended Range: Transmission range of up to 330 feet with selectable 1/10mW RF power output.

Robust Construction and Secure Transmission

Housed in a rugged yet lightweight aluminum casing, the QLXD2/KSM9 transmitter ensures durability and excellent RF performance. The unit also supports AES 256-bit encryption, providing secure transmission for critical applications.

Clear, Accurate Audio with Interchangeable Capsules

This microphone transmitter delivers pristine 24-bit/48 kHz digital audio quality, thanks to several key features:

• KSM9 Capsule: Dual 3/4” gold-layered, low-mass Mylar diaphragms ensure a consistent frequency response.


• Class-A Preamplifier: Discrete transformerless design for transparency, fast transient response, and no crossover distortion.


• Pop Protection Grille: Integrated three-stage grille reduces plosives, wind noise, and breath sounds.


• Interchangeable Capsule Design: Allows replacement of the KSM9 capsule with other Shure capsules like the SM58, SM87A, Beta 58A, Beta 87C, and KSM8.

User-Friendly Features in a Rugged Housing

Designed with ease of use in mind, the QLXD2/KSM9 includes:

• Quick Syncing: Syncs with wireless receivers via infrared at the touch of a button.


• Adjustable Input Sensitivity: Accommodates varying mic levels from booming voices to quiet speech.


• Lockout Functions: Frequency and power lockout features prevent accidental or unauthorized changes during events.


• Backlit LCD: Easy-to-navigate menu and controls for quick access to frequency, group, channel settings, mute, lock status, and RF output.

Flexible Power Management Options

The QLXD2/KSM9 offers versatile power options for uninterrupted performance:

• Battery Life: Operates up to 9 hours on two AA batteries.


• Rechargeable Battery Pack: Optional Shure SB900A lithium-ion battery pack provides over 10 hours of use, precision metering, and no memory effect.


• Docked Charging: External charging contacts for docked battery charging with the SBC200 dual-docking charger (available separately).


• Networkable Charger: SBC220 charger (available separately) enables remote power monitoring via Shure’s Wireless Workbench software.

The Shure QLXD2/KSM9 is an ideal choice for sound reinforcement applications in medium-sized venues, houses of worship, and A/V installations in conference, educational, and corporate facilities.