1. The voltage board can be applied to other triode front-mounted circuit boards, suitable for DIY use by friends with strong manual skills, friends who have no practical , buy front panel + polarizing plate2.60V single output, +-60V dual output, +60V dual input, +60V and +120V dual output, can be according to the voltage of the diaphragm, single output is suitable for single-layer, double-diaphragm microphones Output, suitable for dual-diaphragm microphone head3. It is recommended to use +60V and +120V dual output versions. If you feel that the sound is not strong enough, and the sensitivity is not high enough under 60V voltage, you can switch 120, and then you can connect a switchparameter:Product name: Microphone circuit boardMicrophone type used: diaphragm, -diaphragm condenser microphone (suitable for diaphragms with a diameter of 25mm or less)Frequency response: 40hz-16khzSensitivity: -48dbOutput impedance: 250 ohmsMaximum sound pressure level: 125dbSignal to noise ratio: 60dbPower supply: 15-48V phantom powerWorking current: 3.1ma: DIY production repair modified circuit boardColour:RedMaterial:PCB+metalSize:45x15.8mmPackage Contents:1* Microphone circuit boardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.