QRV-06 The Current Feedback Headphone Amplifier with SMD Diamond Buffer

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The performance is very good. See the technical data!

Interesting features:

1. Extremely low distortion, approx: 0.00046%
2. Extremely fast, > 25 MHz, 3000 V/µs
   
3. The pcb fits virtually any SOT23 small signal transistor and almost any SOT223 power transistor.
4. The emitter loads have cascodes in order to increase linearity.
5. SMD caps, including electrolytic caps.
6. SMD parts which makes the buffer very small and thin.
7. Input LP-filter if you have problems with RF interference, if not just omit it.
8. Professional pcb with groundplane which establish good cooling and shielding.