Product Description This performance 7band sound equalizer and preamplifier is designed for audio enthusiasts, musicians, and professionals seeking precise sound control, enhanced clarity, and reliable compatibility with a wide range of devices. Engineered with quality components and robust circuitry, it delivers consistent, accurate audio adjustment and powerful headphone driving capability. Key Features and Benefits 3.5mm Interface with 4Pole Plug Support Compatible with headsets equipped with a microphone, allowing seamless voice calls on mobile phones without sacrificing audio quality. Includes an additional interface terminal for broader connectivity options. Wide Control Range for Sound Offers a ±12dB control range across its 7band equalization circuit, enabling precise tone adjustments. Frequency bands covered: 60Hz, 150Hz, 400Hz, 1kHz, 3kHz, 6.5kHz, and 15kHz. Built with dependable TI or TL074 components for stable and clean sound performance. Quality Preamplification Utilizes the classic 4580 operational amplifier for 5X amplification (14dB), ensuring rich and detailed sound reproduction. Input impedance of 20K and output impedance of 600 ohms deliver performance across different setups. Powerful Headphone Amplification Integrated NE5532 balanced earphone amplifier based on the proven 47 headphone driver circuit. Easily drives a wide variety of headphones with adjustable output height for comfortable, distortion listening. Performance Highlights Clear, adaptable audio control for both professional and use Built with reliable, industryrecognized amplifier chips for stable operation Compact design suitable for integration into existing audio setups Applications Professional audio mixing: Adjust multiple frequency ranges to achieve studiolevel balance during music production or live sound work. music enjoyment: Finetune bass, midrange, and treble to match taste whether listening through headphones or external speakers. Mobile communication: Use with compatible headsets for crystalclear voice calls while maintaining full equalization capability. This equalizer and amplifier unit delivers precise audio shaping, strong compatibility with common devices, and the ability to drive a wide range of headphones with ease, making it a practical choice for anyone seeking better sound control and quality.