Shure RK100PK In-Line Preamplifier Kit for MX202 Microflex Overhead Microphones is backordered and will ship as soon as it is back in stock.
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Product Overview
The Shure RK100PK is an in-line preamplifier kit for Microflex series microphones that boosts resistance to RF interference from nearby transmitters, 2-way radios, and grounding noise. It is the black-finish replacement preamplifier for the MX202 overhead microphone and is also compatible with a broad range of Shure Microflex lavalier, earset, and condenser microphones including the MX183, MX184, MX185, MX153, and MX291. The RK100PK is used in commercial AV installations where RF noise is a concern in conference rooms, training rooms, and multi-purpose spaces.
Product Description
The RK100PK replaces or supplements the existing in-line preamplifier in Microflex microphone systems, providing increased RFI rejection for installations in electrically noisy environments such as courtrooms, corporate boardrooms, and government facilities where wireless devices and radio communication equipment operate nearby. It connects between the microphone capsule and the XLR cable run, integrating transparently into existing Microflex cabling infrastructure. The black finish matches the MX202B and other black-finish Microflex models. The RK100PKW is the white-finish version for white-finish MX202 and Microflex installations.

Key Features
- RFI Noise Rejection — Boosts resistance to RF interference from wireless transmitters, 2-way radios, and grounding issues, maintaining clean audio in electrically active commercial spaces.
- Broad Microflex Compatibility — Compatible with MX202, MX183, MX184, MX185, MX153, MX291, Beta 91, Beta 98, SM93, WBH53, WCM16, PG185, PG30, and other Shure Microflex models.
- In-Line Integration — Installs between the microphone capsule and XLR cable run without requiring infrastructure changes, providing a straightforward retrofit for existing Microflex installations.
- Black Finish — Matches black-finish Microflex microphone housings including the MX202B for a consistent appearance in ceiling and overhead mounting applications.
- Phantom Power Compatible — Operates on standard phantom power supplied by the connected mixer or DSP, requiring no additional power supply or wiring.
Technical Specifications
| Specification | Value |
|---|---|
| Model | RK100PK |
| Type | In-Line Preamplifier |
| Finish | Black |
| Primary Compatible Models | MX202, MX183, MX184, MX185, MX153, MX291, Beta 91, Beta 98, SM93, WBH53, WCM16, PG185, PG30 |
| Function | RFI-resistant in-line preamplification |
| Power | Phantom power (via connected mixer or DSP) |
| Vendor | Shure Incorporated |
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- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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