Shure SM81

Beschrijving

Flat response curve for accurate reproduction of sound sources | Low noise and high output clipping level | Low distortion over a wide range of load impedance | 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 ) | 0dB/10dB lockable attenuator switch | Phantom powering (DIN 45 596 voltage of 12 to 48Vdc) | Rugged steel construction for durability | Field-usable over wide range of temperature and humidity conditions | Impedance : 150 ohm | Sensitivity : -45 dBV | Total Harmonic Distortion : Less than 0.5% (131dB SPL at 250Hz into 800 ohm load) | Width : 23.50 mm | Shipping Weight : 0.45 kg | Storage Humidity : 0 to 95% relative humidity at room temperature (72°F to 80°F 22°C to 27°C) | Power Supply Voltage : 11 to 52Vdc positive pins 2 and 3 | Regulatory Compliance : CE EMC | Polarity : Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 | Case : Steel construction with vinyl metallic paint finish and stainless steel screens | Furnished Accessories : Swivel Adapter A57F 10dB Attenuator Lock 34A830 Carrying/Storage Case 65A1797 Windscreen 49A111 | Hum Pickup : â??3dB equivalent SPL in a 1 mOe field (60Hz) | Recommended Minimum Load Impedance : 800 ohms (may be used with loads as low as 150 ohms with reduced clipping level) | Cartridge Capacitance : 54 pF | Clipping Level at 1000Hz : 800 ohm load: â??4dBV (0.63 V); 150 ohm load:15dBV (0.18 V) | Self-Noise : 16dB typical A-weighted; 19dB typical weighted per DIN 45 405 (equivalent sound pressure levels; measured with true rms voltmeter) | Output Configuration and Connector : Balanced transformer-coupled output; male XLR connector | Overvoltage and Reverse Polarity Protection : Maximum external voltage applied to pins 2 and 3 with respect to pin 1: + 52Vdc Reverse polarity protection: 200mA maximum (diode-clamped) | Low Frequency Response Switch Positions : Flat -6dB/octave below 100Hz -18dB/octave below 80Hz | Attenuator Switch Positions (Lockable) : 0 or -10dB | Power Current Drain : 1.2 mA maximum | Maximum SPL (Sound Pressure Level) : 136 dB | Product Weight : 0.23 kg | Wireless : No | Minimum Frequency Response (Bandwidth) : 20 Hz | Maximum Frequency Response (Bandwidth) : 20 kHz | Signal to Noise Ratio : 78 dB | Operating Temperature (Maximum) : 74 C | Operating Temperature (Minimum) : 29 C