The Shure ADX2FD/B58 is a premium handheld wireless microphone transmitter that combines the iconic Beta 58A dynamic vocal capsule with the advanced dual-channel transmission technology of the Axient Digital platform. This system is engineered for mission-critical vocal applications where absolute wireless reliability and professional sonic character are non-negotiable, such as major concert tours, broadcast events, and large-scale theatrical productions. The Beta 58A capsule is renowned for its supercardioid polar pattern, which offers superior gain before feedback and excellent rejection of off-axis sound, along with a tailored frequency response that enhances vocal presence and clarity.

The "FD" designation signifies the transmitter's dual-channel capability, meaning it simultaneously broadcasts the audio on two independent radio frequencies—a primary and a backup—to a compatible dual-channel receiver. This creates a seamless, automatic fail-safe system; if interference or a dropout occurs on the primary frequency, the receiver switches to the backup transmission instantly and without any audible gap. This technology provides an unparalleled level of wireless security for live productions where a failure is unacceptable. The transmitter integrates fully into the intelligent Axient Digital ecosystem, supporting remote control via ShowLink and advanced spectrum management from the mixing position.

Constructed to the highest professional standards, the transmitter features a rugged metal body, a hardened steel grille, and a clear OLED display for real-time monitoring. It is powered by a high-capacity rechargeable lithium-ion battery. The ADX2FD/B58 represents the pinnacle of handheld wireless technology, offering the trusted, high-output sound of the Beta 58A backed by the most robust and intelligent transmission system available, making it the definitive choice for audio engineers and performers operating at the highest level.