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{"id":4652643778641,"title":"SM81 Instrument Microphone","handle":"sm81-instrument-microphone","description":"\u003cp\u003eThe Shure SM81 is a high-quality, unidirectional condenser microphone designed for studio recording, broadcasting, and sound reinforcement. Its wide frequency response, low noise characteristics, and low RF susceptibility have made it a standard for applications involving acoustic instruments, especially guitar, piano, and cymbals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSM81-LC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- With windscreen, no cable. Phantom power required.\u003c\/p\u003e\n\u003cp\u003eThe SM81 is ruggedly constructed. It operates on phantom power and performs over a wide range of temperatures and humidity conditions. It is furnished with a swivel adapter, attenuator-switch lock, foam windscreen, and case for carrying and storage. Other accessories are available.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"innoindentin\"\u003e\n\u003cli\u003e0 Hz to 20 kHz frequency response\u003c\/li\u003e\n\u003cli\u003eFlat response curve for accurate reproduction of sound sources\u003c\/li\u003e\n\u003cli\u003eLow noise and high output clipping level\u003c\/li\u003e\n\u003cli\u003eLow distortion over a wide range of load impedances\u003c\/li\u003e\n\u003cli\u003eCardioid polar pattern, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis sounds\u003c\/li\u003e\n\u003cli\u003eLow RF susceptibility\u003c\/li\u003e\n\u003cli\u003eSelectable low-frequency response: flat, 6 or 18 dB\/octave rolloff\u003c\/li\u003e\n\u003cli\u003e0 dB\/10 dB lockable attenuator switch\u003c\/li\u003e\n\u003cli\u003ePhantom powering (DIN 45 596 voltages of 12 to 48 Vdc)\u003c\/li\u003e\n\u003cli\u003eRugged steel construction for durability\u003c\/li\u003e\n\u003cli\u003eField-usable over wide range of temperature and humidity conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eCondenser (electret bias)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e20 to 20,000 Hz\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003ePolar Pattern\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eCardioid (unidirectional) response-uniform with frequency, symmetrical about axis\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eRated at 150 ohms (85 ohms actual)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdd\u003eRecommended minimum load impedance: 800 ohms (May be used with loads as low as 150 ohms with reduced clipping level)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eOutput Configuration and Connector\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eBalanced, transformer-coupled output; male XLR connector\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eSensitivity (at 1,000 Hz)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eOpen Circuit Voltage: -45 dBV\/Pascal (5.6 mV\u003cbr\u003e(1 Pascal = 94 dB SPL)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eClipping Level (at 1,000 Hz)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e800 ohm Load: -4 dBV (0.63 V)\u003c\/dd\u003e\n\u003cdd\u003e150 ohm Load: -15 dBV (0.18 V)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eTotal Harmonic Distortion\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eLess than 0.5% (131 dB SPL at 250 Hz into 800 ohm load)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eMaximum SPL (at 1,000 Hz)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e800 ohm load: 136 dB (attenuator at 0) 146 dB (attenuator at -10)\u003c\/dd\u003e\n\u003cdd\u003e150 ohm load: 128 dB (attenuator at 0) 138 dB (attenuator at -10)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eHum Pickup\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e-3 dB equivalent SPL in a 1 mOe field (60 Hz)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\n\u003cstrong\u003eSelf-Noise\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(equivalent sound pressure levels; measured with true rms voltmeter)\u003c\/dt\u003e\n\u003cdd\u003e16 dB typical, A-weighted\u003c\/dd\u003e\n\u003cdd\u003e19 dB typical, weighted per DIN 45 405\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eSignal-to-Noise Ratio\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e78 dB (IEC 651)* at 94 dB SPL\u003c\/dd\u003e\n\u003cdd\u003e*S\/N ratio is difference between 94 dB SPL and product's equivalent self noise (SPL A-weighted).\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eOvervoltage and Reverse Polarity Protection\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eMax. external voltage applied to pins 2 and 3 with respect to pin 1: +52 Vdc\u003c\/dd\u003e\n\u003cdd\u003eReverse polarity protection: 200 mA max. (diode-clamped)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003ePolarity\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003ePositive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCartridge Capacitance\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e54 pF\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eLow Frequency Response Switch Positions\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFlat; -6 dB\/octave below 100 Hz; -18 dB\/octave below 80 Hz\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAttenuator Switch Positions (Lockable)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e0 or -10 dB\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSupply Voltage: 11 to 52 Vdc, positive, pins 2 and 3\u003c\/dd\u003e\n\u003cdd\u003eCurrent Drain: 1.2 mA max.\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eEnvironmental Conditions\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e\n\u003cdl\u003e\n\u003cdt\u003eTemperature:\u003c\/dt\u003e\n\u003cdd\u003eStorage: -29 degrees to 74 degrees C (-20 degrees to 165 degrees F)\u003c\/dd\u003e\n\u003cdd\u003eOperating: -6.7 degrees to 49 degrees C (20 degrees to 120 degrees F)\u003c\/dd\u003e\n\u003cdt\u003eHumidity:\u003c\/dt\u003e\n\u003cdd\u003eStorage 0 to 95% relative humidity at room temperature (72 degrees to 80 degrees F, 22 degrees to 27 degrees C)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCase\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSteel construction with vinyl metallic paint finish and stainless steel screens\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSee User Guide\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNet: 230 grams (8 oz)\u003c\/dd\u003e\n\u003cdd\u003ePackaged: 740 grams (1 lb 10 oz)\u003c\/dd\u003e\n\u003c\/dl\u003e","published_at":"2020-07-13T11:29:42-04:00","created_at":"2020-07-13T11:29:41-04:00","vendor":"Shure","type":"Microphone","tags":["audio","microphone","Shure"],"price":48900,"price_min":48900,"price_max":48900,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":32460552437841,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"SHURSM81LC","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"SM81 Instrument Microphone","public_title":null,"options":["Default Title"],"price":48900,"weight":771,"compare_at_price":null,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/0261\/0364\/4241\/products\/SM81.png?v=1594654182"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/0261\/0364\/4241\/products\/SM81.png?v=1594654182","options":["Title"],"media":[{"alt":null,"id":7542902915153,"position":1,"preview_image":{"aspect_ratio":1.1,"height":1180,"width":1298,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0261\/0364\/4241\/products\/SM81.png?v=1594654182"},"aspect_ratio":1.1,"height":1180,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0261\/0364\/4241\/products\/SM81.png?v=1594654182","width":1298}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eThe Shure SM81 is a high-quality, unidirectional condenser microphone designed for studio recording, broadcasting, and sound reinforcement. Its wide frequency response, low noise characteristics, and low RF susceptibility have made it a standard for applications involving acoustic instruments, especially guitar, piano, and cymbals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSM81-LC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- With windscreen, no cable. Phantom power required.\u003c\/p\u003e\n\u003cp\u003eThe SM81 is ruggedly constructed. It operates on phantom power and performs over a wide range of temperatures and humidity conditions. It is furnished with a swivel adapter, attenuator-switch lock, foam windscreen, and case for carrying and storage. Other accessories are available.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"innoindentin\"\u003e\n\u003cli\u003e0 Hz to 20 kHz frequency response\u003c\/li\u003e\n\u003cli\u003eFlat response curve for accurate reproduction of sound sources\u003c\/li\u003e\n\u003cli\u003eLow noise and high output clipping level\u003c\/li\u003e\n\u003cli\u003eLow distortion over a wide range of load impedances\u003c\/li\u003e\n\u003cli\u003eCardioid polar pattern, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis sounds\u003c\/li\u003e\n\u003cli\u003eLow RF susceptibility\u003c\/li\u003e\n\u003cli\u003eSelectable low-frequency response: flat, 6 or 18 dB\/octave rolloff\u003c\/li\u003e\n\u003cli\u003e0 dB\/10 dB lockable attenuator switch\u003c\/li\u003e\n\u003cli\u003ePhantom powering (DIN 45 596 voltages of 12 to 48 Vdc)\u003c\/li\u003e\n\u003cli\u003eRugged steel construction for durability\u003c\/li\u003e\n\u003cli\u003eField-usable over wide range of temperature and humidity conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eCondenser (electret bias)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e20 to 20,000 Hz\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003ePolar Pattern\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eCardioid (unidirectional) response-uniform with frequency, symmetrical about axis\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eRated at 150 ohms (85 ohms actual)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdd\u003eRecommended minimum load impedance: 800 ohms (May be used with loads as low as 150 ohms with reduced clipping level)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eOutput Configuration and Connector\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eBalanced, transformer-coupled output; male XLR connector\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eSensitivity (at 1,000 Hz)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eOpen Circuit Voltage: -45 dBV\/Pascal (5.6 mV\u003cbr\u003e(1 Pascal = 94 dB SPL)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eClipping Level (at 1,000 Hz)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e800 ohm Load: -4 dBV (0.63 V)\u003c\/dd\u003e\n\u003cdd\u003e150 ohm Load: -15 dBV (0.18 V)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eTotal Harmonic Distortion\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eLess than 0.5% (131 dB SPL at 250 Hz into 800 ohm load)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eMaximum SPL (at 1,000 Hz)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e800 ohm load: 136 dB (attenuator at 0) 146 dB (attenuator at -10)\u003c\/dd\u003e\n\u003cdd\u003e150 ohm load: 128 dB (attenuator at 0) 138 dB (attenuator at -10)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eHum Pickup\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e-3 dB equivalent SPL in a 1 mOe field (60 Hz)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\n\u003cstrong\u003eSelf-Noise\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(equivalent sound pressure levels; measured with true rms voltmeter)\u003c\/dt\u003e\n\u003cdd\u003e16 dB typical, A-weighted\u003c\/dd\u003e\n\u003cdd\u003e19 dB typical, weighted per DIN 45 405\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eSignal-to-Noise Ratio\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e78 dB (IEC 651)* at 94 dB SPL\u003c\/dd\u003e\n\u003cdd\u003e*S\/N ratio is difference between 94 dB SPL and product's equivalent self noise (SPL A-weighted).\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eOvervoltage and Reverse Polarity Protection\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eMax. external voltage applied to pins 2 and 3 with respect to pin 1: +52 Vdc\u003c\/dd\u003e\n\u003cdd\u003eReverse polarity protection: 200 mA max. (diode-clamped)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003ePolarity\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003ePositive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCartridge Capacitance\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e54 pF\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eLow Frequency Response Switch Positions\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFlat; -6 dB\/octave below 100 Hz; -18 dB\/octave below 80 Hz\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAttenuator Switch Positions (Lockable)\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e0 or -10 dB\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSupply Voltage: 11 to 52 Vdc, positive, pins 2 and 3\u003c\/dd\u003e\n\u003cdd\u003eCurrent Drain: 1.2 mA max.\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eEnvironmental Conditions\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e\n\u003cdl\u003e\n\u003cdt\u003eTemperature:\u003c\/dt\u003e\n\u003cdd\u003eStorage: -29 degrees to 74 degrees C (-20 degrees to 165 degrees F)\u003c\/dd\u003e\n\u003cdd\u003eOperating: -6.7 degrees to 49 degrees C (20 degrees to 120 degrees F)\u003c\/dd\u003e\n\u003cdt\u003eHumidity:\u003c\/dt\u003e\n\u003cdd\u003eStorage 0 to 95% relative humidity at room temperature (72 degrees to 80 degrees F, 22 degrees to 27 degrees C)\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCase\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSteel construction with vinyl metallic paint finish and stainless steel screens\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSee User Guide\u003c\/dd\u003e\n\u003cdd\u003e \u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNet: 230 grams (8 oz)\u003c\/dd\u003e\n\u003cdd\u003ePackaged: 740 grams (1 lb 10 oz)\u003c\/dd\u003e\n\u003c\/dl\u003e"}

SM81 Instrument Microphone

Product Description

The Shure SM81 is a high-quality, unidirectional condenser microphone designed for studio recording, broadcasting, and sound reinforcement. Its wide frequency response, low noise characteristics, and low RF susceptibility have made it a standard for applications involving acoustic instruments, especially guitar, piano, and cymbals.

SM81-LC - With windscreen, no cable. Phantom power required.

The SM81 is ruggedly constructed. It operates on phantom power and performs over a wide range of temperatures and humidity conditions. It is furnished with a swivel adapter, attenuator-switch lock, foam windscreen, and case for carrying and storage. Other accessories are available.

Features:

  • 0 Hz to 20 kHz 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, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis sounds
  • Low RF susceptibility
  • Selectable low-frequency response: flat, 6 or 18 dB/octave rolloff
  • 0 dB/10 dB lockable attenuator switch
  • Phantom powering (DIN 45 596 voltages of 12 to 48 Vdc)
  • Rugged steel construction for durability
  • Field-usable over wide range of temperature and humidity conditions

Specifications:

Type
Condenser (electret bias)
 
Frequency Response
20 to 20,000 Hz
 
Polar Pattern
Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis
 
Output Impedance
Rated at 150 ohms (85 ohms actual)
 
Recommended minimum load impedance: 800 ohms (May be used with loads as low as 150 ohms with reduced clipping level)
 
Output Configuration and Connector
Balanced, transformer-coupled output; male XLR connector
 
Sensitivity (at 1,000 Hz)
Open Circuit Voltage: -45 dBV/Pascal (5.6 mV
(1 Pascal = 94 dB SPL)
 
Clipping Level (at 1,000 Hz)
800 ohm Load: -4 dBV (0.63 V)
150 ohm Load: -15 dBV (0.18 V)
 
Total Harmonic Distortion
Less than 0.5% (131 dB SPL at 250 Hz into 800 ohm load)
 
Maximum SPL (at 1,000 Hz)
800 ohm load: 136 dB (attenuator at 0) 146 dB (attenuator at -10)
150 ohm load: 128 dB (attenuator at 0) 138 dB (attenuator at -10)
 
Hum Pickup
-3 dB equivalent SPL in a 1 mOe field (60 Hz)
 
Self-Noise (equivalent sound pressure levels; measured with true rms voltmeter)
16 dB typical, A-weighted
19 dB typical, weighted per DIN 45 405
 
Signal-to-Noise Ratio
78 dB (IEC 651)* at 94 dB SPL
*S/N ratio is difference between 94 dB 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; -6 dB/octave below 100 Hz; -18 dB/octave below 80 Hz
 
Attenuator Switch Positions (Lockable)
0 or -10 dB
 
Power
Supply Voltage: 11 to 52 Vdc, positive, pins 2 and 3
Current Drain: 1.2 mA max.
 
Environmental Conditions
Temperature:
Storage: -29 degrees to 74 degrees C (-20 degrees to 165 degrees F)
Operating: -6.7 degrees to 49 degrees C (20 degrees to 120 degrees F)
Humidity:
Storage 0 to 95% relative humidity at room temperature (72 degrees to 80 degrees F, 22 degrees to 27 degrees C)
 
Case
Steel construction with vinyl metallic paint finish and stainless steel screens
 
Dimensions
See User Guide
 
Weight
Net: 230 grams (8 oz)
Packaged: 740 grams (1 lb 10 oz)
Sku: SHURSM81LC
Vendor: Shure
$489.00
Maximum quantity available reached.

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