Key features

• •Ultra-miniature electret amplifier module, ultra-small size, support 5 ~ 12V DC power supply, input can be directly connected to the electret microphone without any bias circuit, the sound can be fine-tuned on-board trimmer, the output OUT can drive 8-32ohm(0.5 ~ 35W) speakers, the output power of 750mW, very suitable for DIY various vocal amplifier, pickup, amplifiers, cable walkie-talkie and so on.
• •Parameter: Operating voltage: 5V-12V DC; Operating current: 1mA (static) -150mA (max); Output power: 750mW, instantaneous value 1.5W(max); Output speaker impedance: 4 Ω-32 Ω(impedance high-sound, high efficiency); PCB size: 22x13x7.4mm/0.87x0.51x0.29inch(LxWxH);
• •Input support: electret, microphone, condenser microphone, moving coil microphone, audio signal; Support the speaker power: 0.5W-25W (supported speakers power does not mean that it can emit a loud enough sound, it is generally recommended to add a power amplifier to increase the output power);
• •Default gain: 100db, the potentiometer gain is adjustable: 0 to 100db continuously adjustable, modify the ADD gain capacitor gain can be modified from 20db to 200db;
• •Used for microphone preamplifier effect good, noise and AC ripple is very low, the output signal voltage greater than 1V or more, to promote the power amplifier signal strength.