贵州话筒销售的专业型，专业麦克顾名思义是有别于普通民用麦克风。
贵州话筒销售从功能大概主要分三类：
第*，演出用麦克风，主要使用动圈麦克风和电容麦克风（主要根据使用场合和要求不同而选择）。
第二，录音用麦克风，主要使用电容麦克风和铝带话筒，录音用电容话筒不包括驻极体麦克风。
第三，会议用麦克风，主要使用驻极体和少量的动圈麦克。
Model CA650
Power
8Ωstereo power 650W*2
4Ωstereo power 1300W*2
8Ωbridge power 3000W*2
4Ωbridge power 4500W*2
Other specification
Frequency response 20Hz-20KHz
THD+N ＜0.05%
S/N rate ＞80dB
Damping Factor ＞200
Crosstalk ＞60dB
Slew Rate ＞13V/μs
Input Sensitivity 0.77V/1.0V/32dB
Input Impedance(bal/unbal) 20KΩ/10KΩ
Voltage gain(sensitivity:8ohm) 32dB
Output circuitry Class ITM
Cooling Air flow from front to rear
Protection Soft start,DC,short circuit,over load,
clip limit,over heat, progressive volume,VHF
Connector
Input Balance input XLR-F,Balance output XLR-M
Output Two red and black Binding posts,NL4 SPEKON
Function
Front panel Indicator Front panel indicator:signal,clip,
protect,power indicator, bridge,parallel
LCD display screen Front panel lcd:State attenuating
level of volume control, State operating temperature,
State general maintenance method,State malfunction type.
Front panel Power switch,volume control knob
Rear panel Stereo/parallel/bridge switch,
input sensitivity switch, low pass filter,high
pass filter, grouding switch
Dimension/weight
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