University Sound US649B Dynamic Omnidirectional Lavalier Mic 150 Ohm 1/8" Jack

University Sound US649B Dynamic Omnidirectional Lavalier Mic 150 Ohm 1/8" Jack

The University Sound US649B is a dynamic omnidirectional lavalier microphone manufactured by University Sound in Buchanan, Michigan, USA. It uses a dynamic capsule with an omnidirectional polar pattern, picking up sound evenly from all directions, and terminates in a 1/8" stereo jack at the end of a 30 ft cable — making it suitable for connection to portable amplifiers, mixing boards, and recording interfaces without requiring phantom power.

Specifications & What's Included

• Model: University Sound US649B
• Transducer Type: Dynamic
• Polar Pattern: Omnidirectional
• Frequency Response: 80 Hz – 10,000 Hz
• Impedance: 150 Ohms
• Output Level: -61 dB
• Connector: 1/8" (3.5mm) stereo jack with red strain-relief collar
• Cable Length: 30 ft (approx.), black rubber cable
• Capsule body: approx. 2 inches long, matte black finish
• Made in USA (Buchanan, Michigan)
• Includes: belt clip (wire spring-style), plastic adapter ring, and lanyard neck cord

Applications

Dynamic lavalier microphones like the US649B are standard tools for hands-free audio capture in presentations, lectures, educational settings, and live sound reinforcement. The omnidirectional pattern is well suited for speakers who move their head while talking, as it does not require precise mic positioning. The 150-ohm impedance and -61 dB output level are compatible with most consumer and semi-professional mixing equipment and portable PA systems. University Sound was a well-regarded American microphone manufacturer, and its lavalier mics were widely used in public address, educational, and broadcast-adjacent applications through the 1970s, 1980s, and into the 1990s. The included lanyard and belt clip allow the mic to be worn around the neck or clipped discreetly to clothing. The long 30 ft cable supports use in auditoriums and classrooms where the speaker may be at some distance from the amplifier or mixer. This type of dynamic lavalier remains useful today for any application requiring a simple, passive wired lapel mic without phantom power.