Replacement upgrade microphone core for KTV and stage mics, designed as a plugin upgrade for existing handheld microphones. Sound profile: clear midrange with extended frequency response; thick, natural sound; appearance. Build and production: exquisite workmanship; produced using German professional acoustic equipment production processes. Vocal reproduction and performance: thorough vocal reproduction; accurate directionality; wide frequency range. Key benefits: enhances clarity and presence of vocals, improves mic reliability in live settings, and offers a grade look suitable for professional environments. Use scenarios: 1) Upgrading aging KTV stage microphones in karaoke venues to improve vocal clarity and overall sound quality. 2) Replacing the core in professional live sound setups to achieve more accurate vocal directionality and broader frequency response. 3) Upgrading microphone cores in home studios or rehearsal spaces to emulate stageperformance fidelity for practice and recording.