3KHz Low Pass Filter for Headphone AMP schema using LM368, MF6-50

Filter for Headphone AMP schema

Filter for Headphone AMP schema

Headphone Amplifier Schematic

I built a portable headphone amplifier for testing purposes. Each channel uses a single Burr-Brown LM368, MF6-50 opamp in inverting configuration. It has adequate current capability to drive most headphones without an output stage. I have used it with Sennheiser 465s (94dB SPL) and achieved ear-splitting volume. The amplifier is ideal as a booster for power-conserving sources such as portable CD players and for interfacing with volume controls