The best Byerdynamic A1 headphone amplifier DIY kit,4 pairs output transistor,Low cost but high performance.
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1. Two pair output transistors in parallel connection to improve better control and drive ability,Make solid low range and bigger soundstage, Original A1 headphone amplifier only use one pair output transistor for each channel, It can not work perfectly with AKG and Sennheiser headphones.
2. Special 300mv headphone amplifier with discrete components,No like other A1 headphone amplifier with UPC1237 protective IC which designed for speakers and act at 1.2V DC output.
3. Genuine OMROM relay with lower contact resistance and signal loss
4. Using separate power regulator for OPamps,Make better crosstalk.
5. Optimized layout with ground,Archive better S/N ratio.