CMXM 系列会议话筒-隐蔽式及多拾音头界面话筒 (有线和无线).docx

Technical Specifications技术指标MX395 B/CLow Profile Boundary Microphone(小型界面话筒)performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：Cardioid Output Impedance: 180 ohms actual (EIA rated at 150 ohms) Sensitivity (At 1,000 Hz, open circuit voltage*): -35.0 dBV/Pa (18 mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 121 dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 28.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 66.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：心型输出阻抗：有效阻抗为 180 欧姆（EIA 额定为 150 欧姆）灵敏度（1,000 Hz，开路电压*）：-35.0 dBV/Pa (18 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：121 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：28.0 dB 声压级信噪比（参考 94 dB 声压级）：66.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。电源要求：11 至 52 Vdc，幻象，2.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395 B/C-LEDLow Profile Boundary Microphone(小型界面话筒)performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：Cardioid Output Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -35.0 dBV/Pa (18 mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 121 dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 28.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 66.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: 5-Pin XLR: Positive sound pressure on diaphragm produces positive voltage on pin 4 relative to pin 2 of output XLR connector.Logic Connections:LED IN: Active low (1.0V), TTL compatible. Absolute maximum voltage: -0.7V to 50V.Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：心型输出阻抗：有效阻抗为 170 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-35.0 dBV/Pa (18 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：121 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：28.0 dB 声压级信噪比（参考 94 dB 声压级）：66.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：5-Pin XLR:：振膜上的正声压会在输出XLR插头针脚4处产生相对于针脚2的正电压。逻辑连接:LED 输入: 启动低位 (1.0V), 兼容晶体管逻辑电路，电压最大绝对值：-0.7V 至 50V.电源要求：148Vdc，幻象8.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395 B/OLow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：OmnidirectionalOutput Impedance: 180 ohms actual (EIA rated at 150 ohms) Sensitivity (At 1,000 Hz, open circuit voltage*): -28.0 dBV/Pa (42mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 114dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 21.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 73.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：全指向型输出阻抗：有效阻抗为 180 欧姆（EIA 额定为 150 欧姆）灵敏度（1,000 Hz，开路电压*）：-28.0 dBV/Pa (42 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：21.0 dB 声压级信噪比（参考 94 dB 声压级）：73.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。电源要求：11 至 52 Vdc，幻象，2.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395 B/O-LEDLow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：OmnidirectionalOutput Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -28.0 dBV/Pa (42mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 114 dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 28.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 73.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Logic Connections:LED IN: Active low (1.0V), TTL compatible. Absolute maximum voltage: -0.7V to 50V.Power Requirements: 48Vto 52 Vdc phantom, 8.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：全指向型输出阻抗：有效阻抗为 170 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-28.0 dBV/Pa (48mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：28.0 dB 声压级信噪比（参考 94 dB 声压级）：73.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。逻辑连接:LED 输入: 启动低位 (1.0V), 兼容晶体管逻辑电路，电压最大绝对值：-0.7V 至 50V.电源要求：11V-52Vdc，幻象8.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395AL/CLow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：CardioidOutput Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -35dBV/Pa (18mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 121 dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 28.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 66.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: 5-Pin XLR: Positive sound pressure on diaphragm produces positive voltage on pin 4 relative to pin 2 of output XLR connector.Logic Connections:LED IN: Active low (1.0V), TTL compatible. Absolute maximum voltage: -0.7V to 50V.Power Requirements: 11Vto 52 Vdc phantom, 8.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：心型输出阻抗：有效阻抗为 170 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-35.0 dBV/Pa (18mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：121dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：28.0 dB 声压级信噪比（参考 94 dB 声压级）：66.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：5-Pin XLR:：振膜上的正声压会在输出XLR插头针脚4处产生相对于针脚2的正电压。逻辑连接:LED 输入: 启动低位 (1.0V), 兼容晶体管逻辑电路，电压最大绝对值：-0.7V 至 50V.电源要求：11V-52Vdc，幻象8.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395AL/OLow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：OmnidirectionalOutput Impedance: 180 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -28.0 dBV/Pa (42mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 114dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 21.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 73.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：全指向型输出阻抗：有效阻抗为 180 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-28.0 dBV/Pa (42 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：21.0 dB 声压级信噪比（参考 94 dB 声压级）：73.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。电源要求：11 至 52 Vdc，幻象，2.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395W/OLow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：OmnidirectionalOutput Impedance: 180 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -28.0 dBV/Pa (42mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 114dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 21.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 73.0 dB Dynamic Range at 1 k ohm load: 93 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：全指向型输出阻抗：有效阻抗为 180 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-28.0 dBV/Pa (42 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：21.0 dB 声压级信噪比（参考 94 dB 声压级）：73.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。电源要求：11 至 52 Vdc，幻象，2.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395B/BILow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：Bidirectional (Figure 8)Output Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -37.0 dBV/Pa (14mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 123dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 29.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 65.0 dB Dynamic Range at 1 k ohm load: 94 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：双指向型（“8字型”）输出阻抗：有效阻抗为 180 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-37.0 dBV/Pa (14 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：29.0 dB 声压级信噪比（参考 94 dB 声压级）：65.0 dB1 千欧负载时的动态范围：94dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。电源要求：11 至 52 Vdc，幻象，2.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395AL/BILow Profile Boundary Microphone(小型界面话筒)performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：Bidirectional (Figure 8)Output Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -37.0 dBV/Pa (14mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 123dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 29.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 65.0 dB Dynamic Range at 1 k ohm load: 94 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 11 to 52 Vdc phantom, 2.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：双指向型（“8字型”）输出阻抗：有效阻抗为 180 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-37.0 dBV/Pa (14 mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114 dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：29.0 dB 声压级信噪比（参考 94 dB 声压级）：65.0 dB1 千欧负载时的动态范围：94dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：振膜上的正声压会在输出接头的针脚 2 上产生正电压（相对于针脚 3）。电源要求：11 至 52 Vdc，幻象，2.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX395B/BI-LEDLow Profile Boundary Microphone(小型界面话筒) performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：BidirectionalOutput Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -37.0 dBV/Pa (14mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 123 dB ，All values +6 dB at 0 gain Equivalent Output Noise (A-weighted): 29.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 65.0 dB Dynamic Range at 1 k ohm load: 94 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: 5-Pin XLR: Positive sound pressure on diaphragm produces positive voltage on pin 4 relative to pin 2 of output XLR connector.Logic Connections: LED IN: Active low (1.0V), TTL compatible. Absolute maximum voltage: -0.7V to 50V.Power Requirements: 48Vto 52 Vdc phantom, 8.0mA Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F) Relative Humidity: 0 to 95% 类型：电容（电介质偏压）频率响应：50 至 17,000 Hz拾音模式：双指向型（“8字型”）输出阻抗：有效阻抗为 170 欧姆（EIA 额定为 150 欧姆）输出特性:有源平衡灵敏度（1,000 Hz，开路电压*）：-28.0 dBV/Pa (48mV)1 Pa = 94 dB 声压级最大声压级（1 kHz，1% 总谐波失真，1 千欧负载）：114dB0 增益时，所有值均为 +6 dB等效输出噪声（A 权重）：28.0 dB 声压级信噪比（参考 94 dB 声压级）：73.0 dB1 千欧负载时的动态范围：93 dB共模抑制：最小为 45.0 dB前置放大器输出限幅电平（1% 总谐波失真）：-8.0 dBV (0.4 V)极性：5-Pin XLR:：振膜上的正声压会在输出XLR插头针脚4处产生相对于针脚2的正电压。逻辑连接:LED 输入: 启动低位 (1.0V), 兼容晶体管逻辑电路，电压最大绝对值：-0.7V 至 50V.电源要求：11V-52Vdc，幻象8.0 mA环境要求：使用温度范围：-18 至 57 摄氏度（0 至 135 华氏度）相对湿度：0 至 95%Technical Specifications技术指标MX396/C-DUALMulti-Element Boundary Microphone(多单元界面麦克风)performance parameters性能参数Type: Condenser (electret bias)Frequency Response:50 to 17,000 Hz Polar Pattern ：2 x CardioidOutput Impedance: 170 ohms actual (EIA rated at 150 ohms) Output Configuration: Active balancedSensitivity (At 1,000 Hz, open circuit voltage*): -37.0 dBV/Pa (14mV) 1 Pascal = 94 dB SPL Maximum SPL (1 kHz at 1% THD, 1 k ohm load): 122dB Equivalent Output Noise (A-weighted): 28.0 dB SPL Signal to Noise Ratio (referenced at 94 dB SPL): 66.0 dB Dynamic Range at 1 k ohm load: 94 dB Common Mode Rejection: 45.0 dB minimum Preamplifier Output Clipping Level (1% THD): -8.0 dBV (0.4V) .-12 dBV at 0 gain Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector. Power Requirements: 48to 52 Vdc phantom, 2.0mA Logic Connections：LED IN: Active low (1.0V), TTL compatible. Absolute maximumvoltage: -0.7V to 50V.LOGIC OUT: Active low (1.0V), sinks up to 20mA, TTL compatible.Absolute maximum voltage: -0.7V to 50V (up to 50V through 3k).Mute Switch Attenuation：-50 dB minimumCable：6.1 m (20 ft) attached unte