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QRV-04 - The high performance SMD headphone amplifier with multiple feedback
Click on the picture to see a preview of the pcb.
- The pcb fits virtually any single opamp with or without offset trim.
- Room for good coupling caps (if you must or like), both SMD and regular hole mounted, if you are having trouble in finding big SMD caps.
- Input LP-filter if you have problems with RF interference (you should have a filter though).
- Room for DC removal cap (if you need this).
- Crossover distortion reducer for the opamp. This is a popular circuit in the DIY community.
- Current limitation inside the feedback loop (choose the value you like)
- High speed and high performance SMD buffer as output stage.
- Local feedback for stable performance (only if necessary).
- Multiple feedback as an option.
- High quality power supply with large smoothing caps and transformers on the pcb.
- Fits any headphone (except for electrostatic of course).
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