The Shure RPW112 is a genuine OEM replacement dynamic cartridge designed specifically for Shure SM58 handheld wireless microphone transmitters. This component is the core acoustic element that defines the iconic SM58 sound, known for its tailored vocal presence, durability, and effective built-in spherical wind and pop filter. The RPW112 cartridge directly replaces the original element in compatible SM58-style wireless transmitters, restoring the microphone to its factory-standard audio performance and mechanical integrity. It is engineered to provide the same balanced frequency response, with a pronounced midrange presence that ensures vocals cut through a mix, and the same ability to handle high sound pressure levels with minimal distortion.

Installation of the RPW112 requires careful disassembly of the transmitter's grille and the soldering of the new cartridge's leads to the internal terminals, a task best performed by a qualified audio technician. The cartridge is built to the exact specifications and rugged standards of the original, featuring a robust suspension system to minimize handling noise. For countless vocalists and audio engineers worldwide, the SM58 sound is a trusted benchmark for live vocal reinforcement. The availability of the RPW112 ensures that this trusted performance can be maintained over the long term, allowing for the cost-effective repair of valuable wireless transmitters rather than their replacement.

Keeping an RPW112 in inventory is a prudent measure for rental companies, touring sound engineers, and installed venues that rely on SM58 wireless systems. It addresses common issues such as diminished output, muffled sound, or physical damage to the grille and capsule from impact or moisture. By enabling precise restoration of the transmitter's acoustic properties, the RPW112 replacement cartridge protects the investment in professional wireless equipment and guarantees that performers continue to receive the consistent, reliable vocal sound that has made the SM58 a global standard.