产品介绍
MX412 C/S/N
12英寸(30.5厘米),配有前置放大器
Microflex标准鹅颈话筒鹅颈长度更长,灵活性增强,可满足演讲厅、教学以及法庭等环境中的相关应用。四种型号可提供不同鹅颈长度和安装类型,Microflex鹅颈话筒具有高灵敏度,无变压器平衡输出设计对电磁交流声及射频干扰具有最大的隔离能力,即便使用长也可获得高质量的声音。
■ 提供12英寸(30.5厘米)以及18英寸(45.7厘米)不同长度的鹅颈选择
■ 可互换话筒单元为不同应用场合提供正确指向性选择
■ 缩紧式法兰安装件,可将话筒持久稳固于表面
■ 贴合式泡沫防风罩
■ 防震底座可隔离超过20dB的来自表面的振动噪音
■ 有附带前置放大器、串联前置放大器或桌面底座供选择
提供型号:
MX412 C/S/N
12英寸(30.5厘米),配有前置放大器
MX412S C/S/N
12英寸(30.5厘米),配有前置放大器,静音开关
MX412SE C/S/N
12英寸(30.5厘米),串联前置放大器,10英尺(3米)长的侧面引出电缆
MX412D C/S/N
12英寸(30.5厘米),具有10英尺(3米)电缆的桌面底座
(C=心型,S=超心型,N=无话筒单元)
Microphone Specifications:
Frequency Response
50 to 17,000 Hz
Output Impedance
180 ohms actual (EIA rated at 150 ohms)
Sensitivity (At 1,000 Hz, open circuit voltage*)
Cardioid: -35.0 dBV/Pa (17.8 mV)
Supercardioid: -33.5 dBV/Pa (21.1 mV)
Omnidirectional: -27.5 dBV/Pa (42.2 mV)
All values -12 dB at 0 gain; *1 Pascal = 94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1 k ohm load)
Cardioid: 124.2 dB
Supercardioid: 122.7 dB
Omnidirectional: 116.7 dB
All values +6 dB at 0 gain
Equivalent Output Noise (A-weighted)
Cardioid: 28.0 dB SPL
Supercardioid: 26.5 dB SPL
Omnidirectional: 20.5 dB SPL
Signal to Noise Ratio (referenced at 94 dB SPL)
Cardioid: 66.0 dB
Supercardioid: 67.5 dB
Omnidirectional: 73.5 dB
Dynamic Range at 1 k ohm load
96.2 dB
100 dB at 0 gain
Common Mode Rejection
45.0 dB minimum
Preamplifier Output Clipping Level (1% THD)
-6.0 dBV (0.5 V)
-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, 2.0 mA
Environmental Requirements
Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F)
Relative Humidity: 0 to 95%
Dimensions
See User Guide.