Sell DC 3.8V-15V AD828 Stereo Dynamic Microphone Preamplifier Board MIC Preamp Module Amplifier Board best price

Small size design, SMT process, input and output coupling capacitor using imported non-polar brand capacitors, op amp using fever-level AD828 chip. Notice: the board without voltage regulation function, it is best to use a regulated power supply or battery-powered, otherwise there may be interference. Working Voltage: DC 5V-15V Board Size: 33mm x 25mm You can change the magnification, as follows: R7 and R5 are the gain set resistances (delivery gain default is about 5). However you can change the audio gain according to your needs by changing these two resistors from 5k to 47K, The greater the resistance, the higher the audio gain will be. If you are using radial lead resistors, then remove the original chip resistors from the circuit board and solder the leads into both sides of the pads provided on the circuit board.