Shure RPM53B/O-LEMO – Replacement Boom Arm for TH53, Black, LEMO

Product Overview

The Shure RPM53B/O-LEMO is a genuine OEM replacement boom arm for the TwinPlex TH53 subminiature headset microphone, designed for broadcast, theater, and live speech professionals who require exact-match replacement parts. This black-finish boom arm terminates in a LEMO3 connector, maintaining direct signal compatibility with wireless transmitters and preamps that use LEMO3 connections. When a TH53 boom arm is damaged or worn, the RPM53B/O-LEMO restores the headset to factory specification. It is the manufacturer-recommended Shure TH53 boom arm replacement part for professional AV and broadcast environments.

Product Description

The RPM53B/O-LEMO retains the same clutch adjustment system as the original TH53 headset, allowing fast repositioning of boom arm length and pitch with a simple knob turn — critical for rapid changeovers in live broadcast or theater productions. The black finish matches TH53B headset variants for a consistent on-camera and on-stage appearance. The LEMO3 connector is compatible with Shure wireless transmitters and preamps, including the Shure RPM400LEMO TwinPlex Preamp, making this a direct swap for a damaged component. The 1.6 mm cable maintains the dual redundant ground construction of the original TH53, providing a secondary RF shield for reliable audio in RF-dense live environments.

Key Features

• OEM Exact-Match Replacement — Genuine Shure replacement boom arm manufactured to the same specification as the original TH53 component, ensuring proper fit and audio performance without modification.
• LEMO3 Connector — Terminates in a LEMO3 connector for direct compatibility with wireless bodypack transmitters and preamps using LEMO3 connections, including Shure TwinPlex-compatible systems.
• Clutch Adjustment System — Retains the TH53's clutch-based boom arm mechanism, enabling fast length and pitch repositioning with a simple quarter-turn knob, ideal for rapid performer changeovers in theater or broadcast.
• 1.6 mm Dual-Redundant Ground Cable — Includes a secondary ground connection that provides additional RF shielding, supporting clean audio in environments with high wireless traffic or dense RF environments.
• Black Finish — Color-matched to TH53B black-finish headset variants for consistent on-camera and on-stage appearance.
• Switchable Sides — Supports left- or right-side deployment to accommodate different performer preferences or costume requirements without additional hardware.
• Paintable Cable — The 1.6 mm cable can be painted for additional concealment in costumes or under hair, consistent with professional theater and broadcast staging requirements.

Typical Applications

• Broadcast studio
• Auditorium
• House of worship
• Government space
• Multi-purpose room

Technical Specifications

Frequently Asked Questions

Is this a genuine Shure replacement part?
Yes. The RPM53B/O-LEMO is an official Shure OEM replacement boom arm, manufactured to the same specification as the original TH53 component.

Which headset is this compatible with?
This boom arm is designed exclusively for the Shure TH53 TwinPlex subminiature headset microphone. It is not cross-compatible with other Shure headset models.

What transmitters or preamps accept the LEMO3 connector?
The LEMO3 connector is used on select Shure wireless bodypack transmitters and with the RPM400LEMO wired preamp adapter, which converts LEMO3 output to a standard XLR connection. Confirm your transmitter's input connector before ordering.

Can I switch the boom arm from left to right side?
Yes. The TH53 boom arm design supports switchable left/right deployment, accommodating different performer preferences or costume configurations.

What is Shure's warranty coverage on replacement parts?
Shure replacement parts are covered under Shure's standard limited warranty. Contact Shure support or your authorized dealer for warranty terms applicable to your region.