7Band Audio Equalizer with Integrated Preamplifier and Headphone Amplifier Achieve precise sound control and enhanced audio clarity with this performance 7band equalizer. Designed with quality components and versatile connectivity, it is ideal for music enthusiasts, audio professionals, and anyone seeking customized sound. Key Features and Benefits: **Wide Control Range** Finetune your audio across seven frequency bands ranging from deep bass to crisp highs: 60Hz, 150Hz, 400Hz, 1KHz, 3KHz, 6.5KHz, and 15KHz. The circuit offers ±12dB adjustment per band, enabling accurate sound shaping to match any listening environment. ** Audio Components** Built using TI or ST TL074 ICs for stable and reliable performance, delivering consistent audio quality. **Builtin Preamplifier Gain** Features a 4580 classic operational amplifier providing 5X amplification (14dB), enhancing audio signal strength for cleaner, more dynamic sound output. **Optimized Input and Output Impedance** Input impedance: 20K ohms Output impedance: 600 ohms Engineered for compatibility with a wide range of audio equipment, ensuring proper signal matching and minimal distortion. **Quality Headphone Amplification** Uses the NE5532 to drive a balanced headphone amplifier (47 headphone driver circuit), capable of powering a variety of headphone models with adjustable height for comfort and fit. **Flexible Connectivity** Equipped with a 3.5mm input interface supporting 4pole plugs for headsets with a microphone, allowing seamless voice calls when connected to mobile phones. Also includes RCA output terminals for easy integration with other audio systems. Practical Applications: 1. **Home Audio Systems** sound profiles for movies, music, or gaming, delivering a tailored audio experience that enhances immersion and clarity. 2. **Studio and Recording Environments** Shape and control audio frequencies during mixing or playback, ensuring balanced sound across all tracks. 3. **Portable Listening Solutions** Pair with headphones for onthego fidelity listening, with the ability to adjust audio levels to suit preferences. Designed for precision, durability, and ease of use, this 7band equalizer with integrated preamplifier and headphone amplifier is a reliable solution for anyone looking to achieve professionallevel audio control and performance.