7Band Equalizer and Headphone Amplifier Experience precise sound shaping with a versatile 7band equalization circuit, designed for professional audio control and optimized listening. Key Features: Adjustable Control Range: 7 frequency bands with ±12dB control for fine tone adjustments. Frequencies covered: 60Hz, 150Hz, 400Hz, 1kHz, 3kHz, 6.5kHz, and 15kHz. Built using original TI or ST TL074 components for reliable, quality performance. Powerful Sound Processing: Integrated 4580 op amp delivers 5x amplification gain (14dB), providing clear, strong audio output. Input impedance of 20K ensures compatibility with source devices, while 600ohm output impedance supports various audio equipment. Dedicated Headphone Compatibility: NE5532based headphone amplifier with type 47 driver circuit easily powers all headphone types. Adjustable and low frequency levels offer customized listening for different genres and sound preferences. Flexible Connectivity: 3.5mm input interface supports 4pole plugs. Output connects to headsets with microphones, enabling normal voice calls via smartphones. Additional group interface available for alternative connections. Applications: 1. Home Audio Systems – Precisely tailor music playback to suit your listening environment and taste. 2. Professional Audio Work – Ideal for studio mixing and mastering, offering clear frequency reference and dependable amplification. 3. Mobile Use – Connect directly to smartphones with compatible headsets for enhanced listening and clear communication during calls. This compact, quality equalizer and headphone amplifier delivers professionalgrade audio control, making it suitable for music enthusiasts, audio engineers, and everyday listeners seeking refined sound.