Shure RPM53B/O-NC – Replacement Boom Arm for TH53, Black, Bare Wire

Product Overview

The Shure RPM53B/O-NC is a genuine OEM replacement boom arm for the TwinPlex TH53 subminiature headset microphone, designed for broadcast, theater, and professional integrators who require a bare-wire (no connector) termination for custom installations. When a TH53 boom arm is damaged or requires re-termination for a specific transmitter interface, the RPM53B/O-NC provides a factory-specification cable that can be field-terminated to the desired connector. It is the preferred TH53 bare-wire boom arm replacement option when a specific connector type is not available or when custom wiring is part of the installation design.

Product Description

The RPM53B/O-NC retains the TH53's clutch adjustment system, enabling fast boom arm length and pitch repositioning with a simple quarter-turn knob — valuable for rapid performer changeovers in live theater or broadcast. The bare-wire (no connector) cable end provides maximum flexibility for systems integrators and technicians who need to terminate to a specific connector type or route cable through existing wiring pathways. The 1.6 mm cable maintains the dual redundant ground construction of the original TH53, providing a secondary RF shield suited for high-density wireless environments. The black finish matches TH53B headset variants for a consistent on-camera and on-stage appearance. For users needing a factory-terminated connector, see the RPM53B/O-LEMO or RPM53B/O-MTQG variants.

Key Features

• OEM Exact-Match Replacement — Genuine Shure replacement boom arm built to original TH53 specification for correct fit and performance without modification to the headset frame.
• Bare-Wire (No Connector) Termination — Open cable end allows field termination to any required connector type, providing flexibility for custom installations or transmitter interfaces not covered by factory-terminated variants.
• Clutch Adjustment System — Preserves the TH53's rapid boom arm length and pitch adjustment with a simple quarter-turn knob, reducing setup time during performer transitions.
• 1.6 mm Dual-Redundant Ground Cable — Secondary ground connection provides additional RF shielding for clean audio in dense wireless environments.
• Black Finish — Color-matched to TH53B black headset variants for consistent on-camera and on-stage appearance.
• Switchable Sides — Supports left- or right-side deployment to accommodate different performer preferences or staging requirements.
• Paintable Cable — The 1.6 mm cable accepts paint for additional concealment under hair or within costumes, consistent with professional theater and broadcast staging standards.

Typical Applications

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

Technical Specifications

Frequently Asked Questions

Why choose a bare-wire (no connector) boom arm?
The NC variant is preferred when your transmitter uses a connector type not offered in a factory-terminated variant, or when your integrator or technician needs to custom-terminate the cable during installation.

Is this a genuine Shure replacement part?
Yes. The RPM53B/O-NC 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 and is not cross-compatible with other Shure headset models.

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

What warranty applies to Shure replacement parts?
Shure replacement parts are covered under Shure's standard limited warranty. Contact Shure support or your authorized dealer for regional warranty terms.