Shure Classic Unidyne 545SD Instrument Mic

The Shure Classic Unidyne 545SD Instrument Microphone, a true predecessor to the world-renowned SM57, is a versatile, dynamic mic that sets the standard for excellence in audio performance. Designed to deliver superior sound quality, this dual-impedance, unidirectional microphone is your ultimate solution for instrument pickup, recording, and even public address systems. Manufactured with precision, the 545SD is shipped with a low-impedance operation but can be adjusted for high-impedance for broader compatibility, ensuring it fits seamlessly into any audio setup. This instrument mic features a silent magnetic reed on/off switch with a convenient lock-on option, providing straightforward and reliable operation in any situation.

The 545SD Classic Unidyne Instrument Microphone is celebrated for its exceptionally uniform cardioid pattern, effectively minimizing feedback and background noise, making it ideal for both studio sessions and live performances. Its robust chrome-plated die-cast body complemented by an ARMO-DUR grille ensures durability, while the internal rubber vibration-isolator shock mount provides stable and clear sound capture even in high-energy environments. Whether you are a professional musician, a public speaker, or an audio enthusiast, the Shure Classic Unidyne 545SD promises unmatched performance, reliability, and clarity that will elevate your audio experience.

Key Features

• Exceptionally uniform cardioid pattern minimizes feedback
• Selectable dual-impedance operation
• Silent magnetic reed on/off switch with lock option
• Ideal for instrument pickup and recording
• Can be used on lecterns in public address systems
• Durable chrome-plated die casting with ARMO-DUR grille
• Internal rubber vibration-isolator shock mount

Specifications

• Type: Dynamic
• Frequency Response: 50 to 15,000 Hz
• Polar Pattern: Cardioid (unidirectional), uniform with frequency, symmetrical about axis
• Impedance: Dual; 150 ohms (250 ohms actual) for low impedance “High” for high-impedance input
• Output Level (at 1,000 Hz): L-58.0 dB (1.3 mV), H-35.0 dB (17.6 mV)
• Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 (with respect to pin 3)
• Switch: Built-in magnetic reed on/off switch with lockplate
• Cartridge Shock Mount: Internal rubber vibration-isolator
• Swivel Adapter: Adjustable through 90° from vertical to horizontal, 5/8”–27 thread
• Case: Chrome-plated die casting with ARMO-DUR grille and stainless steel screen
• Net Weight (less cable): 255 grams (9 oz)

Package Contents

• Shure Classic Unidyne 545SD Instrument Microphone
• Swivel Adapter
• User Manual