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Item # 270171 | Customer Ratings: Ratings ( 5 Based on 7 reviews)

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Shure SM81 Condenser Mic
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      Shure SM81 Condenser Mic (270171)
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A studio standard for miking acoustic guitar, piano, and cymbals.

The Shure SM81 Condenser Mic is a unidirectional cardioid mic with studio, broadcast, and sound reinforcement versatility. Its wide frequency response, low noise, low RF susceptibility, and rugged construction allow it to excel in all applications. It is furnished with a swivel adapter, 10dB attenuator with locking switch, a 3-position low-cut filter, foam windscreen, and a case for carrying and storage.

The SM81 requires phantom power.

Shure SM81 Condenser Mic Features:

  • 20Hz-20kHz frequency response
    Flat response curve for accurate reproduction of sound sources
    Low noise and high output clipping level
    Low distortion over a wide range of load impedances
    Cardioid polar pattern with maximum rejection and minimum coloration of off-axis sounds
    Low RF susceptibility
    Selectable low-frequency response: flat, 6, or 18dB/octave roll-off
    Phantom powering
    Rugged steel construction
    Field-usable over a wide range of temperatures and humidities


Shure SM81 Condenser Mic Specifications:

  • Type: Condenser (electret bias)
    Frequency Response: 20 to 20,000Hz
    Polar Pattern: Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis
    Output Impedance: Rated at 150O (85O actual)
    Recommended minimum load impedance: 800O (May be used with loads as low as 150O with reduced clipping level)
    Output Configuration and Connector: Balanced, transformer-coupLED output; male XLR connector
    Sensitivity (at 1,000Hz): Open Circuit Voltage: -45dBV/Pascal (5.6 mV), (1 Pascal = 94dB SPL)
    Clipping Level (at 1,000Hz): 800O Load: -4dBV (0.63 V), 150O Load: -15dBV (0.18 V)
    Total Harmonic Distortion: Less than 0.5% (131dB SPL at 250Hz into 800O load)
    Maximum SPL: (at 1,000Hz): 800O load: 136dB (attenuator at 0) 146dB (attenuator at -10), 150O load: 128dB (attenuator at 0) 138dB (attenuator at -10)
    Hum Pickup: -3dB equivalent SPL in a 1 mOe field (60Hz)
    Self-Noise (equivalent sound pressure levels; measured with true rms voltmeter) 16dB typical, A-weighted, 19dB typical, weighted per DIN 45 405
    Signal-to-Noise Ratio: 78dB (IEC 651)* at 94dB SPL, *S/N ratio is difference between 94dB SPL and product's equivalent self noise (SPL A-weighted)
    Overvoltage and Reverse Polarity Protection: Max. external voltage applied to pins 2 and 3 with respect to pin 1: +52 VDC, Reverse polarity protection: 200 mA max. (diode-clamped)
    Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3
    Cartridge Capacitance: 54 pF
    Low Frequency Response Switch Positions: Flat; -6dB/octave below 100Hz; -18dB/octave below 80Hz
    Attenuator Switch Positions (Lockable): 0 or -10dB
    Power: Supply Voltage: 11 to 52 VDC, positive, pins 2 and 3, Current Drain: 1.2 mA max
    Environmental Conditions:
    Temperature:
    Storage: -29° to 74° C (-20° to 165° F)
    Operating: -6.7° to 49° C (20° to 120° F)
    Humidity:
    Storage 0 to 95% relative humidity at room temperature (72° to 80° F, 22° to 27° C)
    Case: Steel construction with vinyl metallic paint finish and stainless steel screens
    Dimensions (D x W): 212mm x 23.5mm, 8.3" x .93"
    Weight Net: 230g (8oz.)


Shure SM81 Condenser Mic

One year warranty on wireless mics, mixers, and circuitry products.
2 year warranty on wired mics.
Warranty terms vary. Check with manufacturer for specific product warranty.

Get your gear covered!

Now you can get added warranty protection for your new gear. Pro Coverage steps in where the manufacturer's "normal wear and tear" ends. Our PRO COVERAGE program offers you UPGRADED COVERAGE if your product ever fails!

Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
Product Reviews
(Based on 7 reviews)
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Viewing Reviews 1 - 3 of 7 |
  • Outstanding

    As reviewed by TomD on 8/9/2010

    I own a number of pairs of high quality condenser mics. The Shure SM 81 is extremely neutral in its sound. It is quiet, has extremely fast transient response and reproduces acoustic guitar, drum cymbals, and violins more naturally than any other mic I've tried.

    3 of 3 people found this review helpful.
    Was this review helpful?
  • Fantastic and Versatile

    As reviewed by Sheridan on 4/17/2009

    This microphone has been an absolute pleasure to work with. Our church owns 4 and has used them for everything from miking the piano (which we don't do anymore) to miking women's ensemble to children's choir. We've been amazed how one mic can project 8 women. These mics work well with the stereo mic clip too.

    3 of 3 people found this review helpful.
    Was this review helpful?
  • Throw away all other drum mics

    As reviewed by Jim on 4/13/2011

    Just got 2 81s to use as drum overheads in the studio....if you have 2 of these and a kick mick (I have an AKG D112) you are set. The 81s give you a true acoustic drum sound and even more importantly when EQing them on an analog board, you can easily separate cymbals, toms and snare to give your mix an outstanding sound. You may never close mic again.

    2 of 2 people found this review helpful.
    Was this review helpful?
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