This is a professional three-way crossover module for tweeter, midrange and bass, designed for KTV and live stage use. It also functions as a DIY upgrade tool to enhance audio quality. - Three-way crossover: Splits the mixed analog audio signal into high, mid, and low bands and routes each to the corresponding driver (tweeter, midrange, bass) to achieve clearer, more accurate sound quality. - High quality capacitors: Low loss and reliable, addressing common electrolytic capacitor issues to improve long-term performance. - Quality build and protection: High temperature resistant wiring, wire-wound ceramic resistor, and imported metal-film resistors. Includes overcurrent protection, with clean wiring and a sensible component layout. A small switch allows adjusting the highs, typically adding about 3 dB. - Adjustable high frequency level: The switch provides treble/highs adjustment to tailor the sound to different rooms and audiences. - Compatibility and applications: Designed for three-way speaker configurations in KTV setups and DIY audio projects; suitable for upgrades in professional stage systems or personal builds. Use scenarios - Live karaoke setup: Improve vocal clarity and overall sound separation in small to medium venues. - DIY speaker upgrade: Integrate into a three-way speaker project to achieve better high/mid/low separation and improved dynamics. - Small venue sound reinforcement: Enhance tonal balance and reduce distortion by delivering well-separated frequency bands to each driver. This unit provides a practical, reliable upgrade path for three-way speaker systems, with robust components and a simple adjustment option to tailor high-frequency response.