ZK-PRO1 is a fever-grade HIFI audio front tone control board. It serves as an audio pre-processing module between signal source and power amplifier. Equipped with five independent adjustable knobs for Volume, Treble, Midrange, Bass and Balance. Optimized low-noise operational amplifier circuit with premium audio capacitors, effectively reducing distortion and delivering rich, layered sound. Matched with 30cm extension cables for flexible cabinet installation. Widely used for DIY HIFI amplifiers, active speaker upgrades and audio equipment modification.

✅ 5-Way Independent Tone Adjustment Separate knobs for Main Volume, Treble, Midrange, Bass and Left/Right Balance. Freely tune timbre to suit different music styles. ✅ Fever-Grade Low Noise Circuit High-quality audio capacitors and low-noise op-amps are adopted. Low background noise and small signal distortion, restore delicate music details. ✅ Separated Potentiometer Design Comes with 30cm connecting cables, allowing knobs to be mounted on the cabinet panel easily. ✅ Stereo Dual Channel Design Left and right channel symmetric circuit layout, ensuring consistent stereo sound field. ✅ Wide Compatibility Works perfectly with various digital amplifier boards, analog power amplifiers and active speakers. ✅ Multiple Reserved Interfaces Standard XH2.54 terminals for audio input, output and potentiometer connection, simple wiring.