Shure MX183

A High-End Lavalier Microphone Focused on "Speech," in the Spirit of MICROFLEX

Designed for speech reproduction, this lavalier microphone follows the philosophy of the MICROFLEX series: a discreet, refined solution oriented towards intelligibility. The "interchangeable capsule + detachable preamplifier" approach allows building a capture chain tailored to field constraints while maintaining a lightweight format that is easy to integrate on a speaker. The black finish enhances visual discretion, a key point in conferences, corporate settings, on stage, or during video recordings.

Who and What It's For: Conferences, Presentations, Demanding Speech Applications

This lavalier microphone is particularly suited for lecturers, trainers, speakers, and presenters who need a clear voice effortlessly and with simple placement. Thanks to its omnidirectional polar pattern, it remains tolerant to distance variations (when turning, reading notes, or addressing the audience), facilitating a consistent level and intelligible diction.

Practically, it is also suitable for corporate events, panel discussions, places of worship, teaching, and any situation where message comprehension is prioritized over a marked "studio" coloration. The electret capsule, known for its precision and responsiveness, contributes to articulated reproduction, useful for consonants and vocal presence.

RK100PK Preamplifier and Electret Capsule: Stability, Discretion, and Adaptability

A Preamplifier Designed for Interference-Prone Environments (GSM)

The detachable RK100PK preamplifier is designed to limit interference caused by GSM signals, a tangible advantage in conference rooms, trade shows, or studios where smartphones and RF equipment coexist. This immunity improves daily reliability and reduces the risk of noise distractions that can divert the audience's attention.

Switchable Gain: +12 dB or 0 dB

The 12 dB gain is switchable to 0 dB, allowing level adjustment depending on the context: softer voice, more discreet placement, more dynamic speaker, or adaptation to the system's input level. The goal is to maintain a comfortable headroom and clean speech without excessive compensation at the console or processing stage.

Omnidirectional Capsule: Consistent Voice Even in Motion

The omnidirectional polar pattern is a coherent choice for speech capture: it picks up the voice evenly and limits timbre variations caused by head movements. It promotes natural and stable listening while remaining easy to position on a jacket, shirt, or collar.

Regarding accessories, the two provided windshields help control breath noises and air sounds, while the single and double clips facilitate secure attachment depending on attire and configuration (tie, lapel, buttonhole, etc.).

Technical specifications

Sensitivity	-27,5 dBV/Pa (42,2 mV)	Capsule	static
SPL max	116.7 dB	Nominal impedance	180 Ω
Frequency response - start	50 Hz	Self-noise	20,5 dB
Frequency response - end	17 kHz	Connection	XLR
Category	wired microphone	Clamp included	Yes
Type	lavalier	Included accessories	Windscreen, clothespin
Directivity	omnidirectional	Cables included	Yes

Capsule Type	Electret condenser	Output Impedance	180 ohms
Polar Pattern	Omnidirectional	Cable	Shielded, 1.20 m
Frequency Response	50 Hz to 17 kHz	Preamplifier	Detachable RK100PK, immune to GSM interference
Equivalent Noise Level	20.5 dB SPL-A	Gain	12 dB switchable to 0 dB
Max SPL	116.7 dB	Color	Black