The SM81 is a precision cardioid condenser microphone designed for studio recording and live sound reinforcement of acoustic instruments. Its flat, neutral frequency response and low self-noise make it an industry standard for acoustic guitar, piano, cymbals, and orchestral ensembles. A 10 dB attenuator and three-position low-cut filter provide versatile gain staging in demanding environments.

Performance

• Flat, neutral response: Accurate reproduction across the full frequency range without coloration
• 10 dB attenuator: Allows placement close to loud sources such as drum overheads without distortion
• 3-position low-cut filter: Flat, 6 dB/octave at 100 Hz, or 18 dB/octave at 80 Hz for reducing rumble and proximity effect
• Low self-noise: Captures subtle detail in quiet acoustic recordings
• Cardioid pattern: Consistent pickup across the frequency range with excellent off-axis rejection

Specifications

• Type: Condenser
• Polar pattern: Cardioid
• Frequency response: 20 Hz to 20,000 Hz
• Sensitivity: -36.0 dBV/Pa (15.8 mV)
• Output impedance: 150 ohms
• Maximum SPL: 136 dB (146 dB with attenuator)
• Self-noise: 16 dB SPL-A
• Connector: 3-pin XLR
• Power: 48V phantom power required
• Dimensions: 216 x 20 mm (8.50 x 0.79 in)
• Weight: 257 g (9.1 oz)

In the Box

• Shure SM81 condenser microphone
• A57F adapter
• Foam windscreen
• Zippered carrying case