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Wednesday, July 1, 2015

DSHA-2 Headphone Amplifier


The DSHA-2 Headphone amp is almost ready for production, so I thought I'd post a few pictures.





The amp is fully differential from front to back and utilizes transformers for gain. It uses the excellent Lundahl LL1544a (shown) or LL1545a for about 10dB gain, or it can use a LL1674 for about 16dB gain.

Input buffer is based around the LSK389 JFET while the output buffer uses the SSM2212 in a Sziklai pair.

The power supply is external, and it can use an off the shelf supply or one of our own to add some extra filtering.

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