Optimus Black Omnidirectional High-Sensitivity Boundary Microphone (33-3022)
Open box gently used Optimus Black; Omnidirectional High-Sensitivity Boundary Microphone (33-3022). The Optimus Omnidirectional Boundary Microphone (originally sold under the RadioShack brand name) is a vintage, low-profile electret condenser microphone designed primarily for capturing clear ambient audio across flat surfaces. Most commonly found as models 33-3020 or 33-3022, these microphones are highly regarded in budget audio communities as inexpensive alternatives to professional Crown PZM (Pressure Zone Microphone) units.