I’m building a headphone amplifier, with USB-DAC if I can fit it in the enclosure he chose. The enclosure is a clone of the Lehmann BCL enclosure.
The headphone amplifier is my version of the XP-7 (I think it’s called), with an AD797 and a buffer. I chose the LME49600 instead of the BUF634 in this build.
I’ve added a C-L-C filter to the original design, and the PCB’s are mono so two are needed.
I’ll use PPS capacitors and 0.1% minimelf resistors, the larger capacitors will be Panasonic very low ESR.
For the +/-12V supply, I’ll use TPS7A4700 and TPS7A3301 ultra low noise LDO’s.
I will add a USB-DAC if there’s room in the enclosure. For this I’m going with basic parts, PCM2706 and ESS 9023.
If I can fit the USB-DAC in the enclosure, I’ll use another TPS7A4700 for the +5V supply for these boards.
More to follow…
/Mayday 2021/03/25
Search engine nonsense:
Headphone amplifier, dac TPS7A4700 TPS7A3301 LME49600 AD797 USB D/A
Mayday DIY audio 