Boosts mic signal with +28 dB gain and low noise to solve the problem of low volume from low-sensitivity mics. Active built-in preamplifier inserted between the preamplifiers of passive ribbon or dynamic microphones. Plug-and-play: simply connect the microphone amplifier to the microphone's XLR output port. CLASS-A amplifier circuit design with a high-order MP5+ transistor delivers lower output impedance and stronger load capacity for stable, clear audio. Compatibility: designed for passive ribbon and dynamic microphones. Compact inline design for easy integration into existing mic setups. Use scenarios - Home studio: boost low-output vocal or instrument mics for clearer, fuller sound. - Live performance or rehearsal: maintain consistent gain across varying mic levels. - Field recording: inline gain boost before the main preamps in portable rigs for better signal integrity.