Headphone Amplifier Design
Building dedicated headphone amplifiers for optimal listening quality.
Headphone amplifiers require careful design to drive a wide range of headphone impedances with low distortion and adequate power. From portable designs to desktop units, the principles remain consistent.
Objectives
- Understand headphone impedance and sensitivity specifications
- Design amplifiers with appropriate output impedance
- Calculate power requirements for different headphone types
- Implement ground loop prevention
- Build both single-ended and balanced outputs
Key Takeaways
- Output impedance should be <<headphone impedance
- Power requirements vary widely with headphone efficiency
- Damping factor affects bass control
- Portable designs prioritize battery life