Shure 545SD-LC Classic Unidyne Instrument Microphone

The Shure 545SD-LC is a dynamic microphone built around a cardioid pickup pattern for musicians, presenters, and audio engineers who need dependable sound capture on stage and in the studio. Drawing on the classic Unidyne architecture that inspired the SM57, it focuses on the sound source directly in front of the grille and keeps ambient noise under control, so recordings and live mixes come through with definition and presence.

The microphone offers switchable low or high impedance, letting you run long cables with minimal signal loss or plug straight into guitar amplifiers and compact PA systems. A standard three-pin XLR output makes connection to mixers, audio interfaces, or stage boxes quick and familiar.

A magnetic reed on off switch sits on the body, giving performers silent muting between songs and letting speakers pause without audible clicks. When the microphone is installed permanently, the switch can be locked to prevent accidental shutdowns.

The end-address construction guides you to aim the top grille at drums, guitar cabinets, or spoken-word sources, and the rugged housing stands up to life on the road. Despite that strength, the microphone remains light, so it is comfortable to hold for a full set or to mount on a stand without sagging.

From rehearsal spaces and school auditoriums to broadcast booths and touring rigs, the 545SD-LC adapts easily. Use it to capture a snare drum that cuts through the mix, deliver a clear podium speech, or mic an acoustic guitar in a home studio; its reliable cardioid pattern and proven Shure durability make it an easy choice.

Highlights:

• Dynamic microphone with a cardioid pattern that reduces feedback and focuses on the intended source
• Dual impedance operation adapts to low or high impedance equipment
• Magnetic reed on off switch with optional lock for silent muting
• Standard XLR connection for quick integration with mixers and interfaces
• End-address construction built for durability in professional use
• Suitable for instrument recording and public address applications
• Lightweight body that is easy to handle during long performances