Electret Microphone Preamplifier with Adjustable Gain and Multiple Output Options This microphone preamplifier is designed for clear, quality audio amplification, versatile connectivity, and practical use in various sound applications. Key Features and Benefits: • Compatible Microphone Input: 3.5 mm biasenabled input supports electret microphone heads or 3.5 mm capacitor microphones. Provides reliable connection for common microphone types used in recording and broadcasting. • Adjustable Power Supply and Gain: Operates on DC 5–12 V, allowing flexible power options. Built with the MC33202 railtorail operational amplifier for audio performance, offering low distortion and consistent gain across the voltage range. • Versatile Output Interface: Output via 3.5 mm port can be connected to microphone inputs on other devices, auxiliary inputs, or LINElevel inputs. Not suitable for direct headphone listening through the preamp output, ensuring signal integrity for audio equipment. • Multiple Output Ports and Mixing Capability: Three output ports deliver independent or mixed signals. Mixed output port can directly drive headphones when needed, enabling realtime listening and monitoring without additional amplification equipment. Performance Highlights: • Clean, lownoise amplification for voice and music signals. • Flexible connectivity supporting various audio setups. • Compact design for easy integration into portable or stationary systems. Applications: 1. Home recording setups – connect an electret or capacitor microphone to boost audio clarity for podcasting, streaming, or voiceovers. 2. Educational or conference environments – amplify speech from a microphone for connection to PA systems or recording devices. 3. DJ and music performance – mix live microphone audio with background music for direct headphone monitoring without complex mixing equipment. This electret microphone preamplifier offers dependable amplification, versatile connections, and control over gain for both casual and professional audio projects.