28 dB gain with low noise to address the problem of low microphone volume caused by low sensitivity. Active builtin preamplifier inserted between the preamplifiers of passive ribbon or dynamic microphones, enhancing the signal at the source. Simple plugandplay connection: just plug the microphone amplifier into the microphone's XLR output port. CLASSA amplifier circuit design with a MP5 transistor, delivering lower audio output impedance and stronger load capacity for clearer, more robust audio. Compatible with passive ribbon and dynamic microphones, providing a practical gain boost without introducing extra noise. Performance focus: improves gain, maintains signal integrity, and supports a more reliable frontend for lowoutput mics. Use scenarios Instudio recording with passive ribbon or dynamic microphones that have low output, to achieve usable levels without excessive gain on downstream equipment. Live sound to ensure consistent vocal or instrument levels from dynamic mics, with improved headroom and reduced noise. Home studio or podcast setups where microphones have limited sensitivity, enabling clearer voice capture with minimal equipment changes.