舒尔有线界面话筒　SHURE　MX391

产品介绍

精巧的外型设计及卓越的声音还原能力，Microflex界面话筒是会议室理想的选择方案。具有可编程功能、无声薄膜开关、可互换话筒头、逻辑输入和输出以及LED指示灯等特性，Microflex界面话筒在各种应用场合都能够提供高品质声音。

■ 心型、超心型及无指向性
■ 黑色或白色型号可供选择
■ 可编程、无声薄膜开关
■ 逻辑输入和输出端子
■ LED指示灯

提供型号：

MX391W C/S/O 白色，串联前置放大器，配有具有4－pin mini接头的电缆

C＝心型，S＝超心型，O＝无指向性

MICROPHONE SPECIFICATIONS

Polar Pattern: Cardioid (MX391/C, MX391W/C, MX391LP/C, MX391WLP/C); Supercardioid (MX391/S, MX391W/S, MX391LP/S, MX391WLP/S); Omnidirectional (MX391/O, MX391W/O, MX391LP/O, MX391WLP/O)
Environmental Requirements: Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F); Relative Humidity: 0 to 95%
Dimensions: See User Guide

PREAMPLIFIER SPECIFICATIONS MX391 ONLY

These specifications apply only to the MX391/MX391W microphones when used with the supplied preamplifier. All measurements taken with the microphone mounted on a 76.2 cm x 76.2 cm (30 in. x 30 in.) wooden surface and with the sound source incident at 30 . with respect to the surface plane.

Frequency Response: 50 to 17,000 Hz
Output Impedance (at 1000 Hz): 180 ohms actual (rated at 150 ohms)
Open Circuit Sensitivity 1 kHz ref. 1 V per Pascal *: Cardioid: -29.6 dB (33.5 mV); Supercardioid: -28.3 dB (38.5 mV); Omnidirectional: -21.5 dB (81.4 mV); All settings -12 dB at 0 gain; *1 Pascal = 94 dB SPL
Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 k ohm load): Cardioid: 118.8 dB; Supercardioid: 117.5 dB; Omnidirectional: 110.7 dB; All settings +6 dB at 0 gain
Signal to Noise Ratio (referenced at 94 dB SPL): Cardioid: 71.4 dB; Supercardioid: 72.7 dB; Omnidirectional: 79.5 dB
Equivalent Output Noise (A-weighted): Cardioid: 22.6 dB SPL; Supercardioid: 21.3 dB SPL; Omnidirectional: 14.5 dB SPL
Dynamic Range at 1 k ohm Load: 96.2 dB; 100 dB at 0 gain
Common Mode Rejection: 45 dB minimum, 10 Hz to 100 kHz
Preamplifier Output Clipping Level: -6 dBV (0.5 V); 12 dB at 0 gain
Polarity: Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of the preamplifier XLR output connector.
Power Requirements: 11 to 52 Vdc phantom; 2.0 mA current consumption