Sound Pure's Take

The Shure SM81-LC is a classic, no-nonsense small-diaphragm condenser microphone that belongs in every studio locker. If you need a transparent, ruler-flat microphone that captures acoustic guitars, drum cymbals, and pianos with total fidelity and zero artificial hype, the SM81 is a time-tested reference standard.

This one has a replacement mic clip.

From Shure

The Shure SM81-LC is a industry-standard, small-diaphragm electret condenser microphone engineered specifically for critical studio recording, broadcast, and high-end live sound reinforcement. Renowned for its exceptionally flat, extended frequency response and precise polar consistency, the SM81 is a reference choice for acoustic instruments—including acoustic guitar, piano, brass, woodwinds, and drum overheads or cymbals—where uncolored, natural sound reproduction is paramount.

Built with a high-grade transducer and advanced transformerless output stage, the SM81 delivers precise transient response, low distortion, and exceptional RF immunity. It features a 3-position low-frequency response switch (flat,$6\text{ dB/octave}$ roll-off, or $18\text{ dB/octave}$ cut) to mitigate proximity effect and low-frequency rumble, alongside a lockable $10\text{ dB}$ attenuation pad for handling high sound pressure levels. Housed in a heavy-duty steel structure, the SM81 operates reliably over a wide range of temperature and humidity conditions.

Key Features

  • Exceptionally Flat Frequency Response: Delivers precise, uncolored reproduction of acoustic instruments, percussion, and classical ensembles across a broad $20\text{ Hz to } 20,000\text{ Hz}$ range.

  • Precise Cardioid Polar Pattern: Uniform directional pickup maximizes gain before feedback while providing excellent off-axis rejection of ambient room noise.

  • 3-Position Low-Frequency Response Switch: Selectable low-end control (flat,$6\text{ dB/octave}$ slope, or $18\text{ dB/octave}$ cut) eliminates mechanical rumble, wind noise, and excessive proximity effect.

  • Lockable 10 dB Attenuation Pad: Built-in attenuator switch increases maximum SPL handling capability to $146\text{ dB SPL}$ for high-volume sources like drum overheads and brass.

  • Rugged Steel Construction: Vinyl-coated steel casing and robust internal shock isolation ensure reliable performance across demanding touring and studio environments.

  • Phantom Powered Flexibility: Operates on standard $11\text{V to } 52\text{V DC}$ phantom power (DIN 45596) with low internal noise floor ($16\text{ dB-A}$).

Element Type
Electret Condenser
Polar Pattern
Cardioid
Frequency Response
$20\text{ Hz to } 20,000\text{ Hz}$
Output Impedance
$150\ \Omega$ rated ($85\ \Omega$ actual)
Sensitivity
$-45.0\text{ dBV/Pa}$ ($5.6\text{ mV}$) at $1\text{ kHz}$ ($1\text{ Pa} = 94\text{ dB SPL}$)
Maximum SPL
$136\text{ dB SPL}$ ($146\text{ dB SPL}$ with pad engaged) at $1\text{ kHz}, 800\ \Omega$ load
Signal-to-Noise Ratio
$78\text{ dB}$ ($S/N = 94\text{ dB SPL} - \text{noise}$)
Equivalent Output Noise
$16\text{ dB-A}$ (typical, A-weighted)
Dynamic Range
$120\text{ dB}$
Clipping Level
$-4\text{ dBV}$ ($0.63\text{ V}$) at $1\text{ kHz}, 800\ \Omega$ load
Power Requirements
$11\text{V to } 52\text{V DC}$ Phantom Power ($1.2\text{ mA}$ current drain)
Connector
3-pin XLR male
Dimensions
$212\text{ mm}$ length $\times 23.5\text{ mm}$ diameter ($8.35" \times 0.93"$)
Weight
$230\text{ g}$ ($0.5\text{ lbs}$)
Sound Pure Studios Control Room A — Durham, NC

Sound Pure Studios · Durham, NC

Come hear it in our control rooms.

Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.

$265