2. DSD upgrade to hard solution, DSD64 \\ 128 \\ 256 are hard solution 3. Upgrade to an independent OP275 LPF circuit
Luxury Metal unibody, Fashion Aluminum alloy casing
4. Upgrade the op amp power supply system is plus or minus 13V, a total of 26V power supply. 5. Upgrade the amp amp as LM4562NA Feature:

Product Brand : DIY Zishan MP3 Music Play

Wooeasy DIY MP3 Zishan Z2 Player Lossless Music MP3 HiFi Music Player Support Headphone Amplifier DAC AK4490 Z1 Upgrade VERSION
1. DAC upgrade to AK4490, million level AK38O is also using the DAC.
Max Support :256GB TF/Micro Card Z2 support lossless format, 192k 32b vocal, DSD hard solution, DSD ISO, folder operation; independent audio crystal + AK4490 DAC program, the real Lineout output, plus or minus 13V high pressure ear Can be replaced with op amp design, fever capacitors, indicators HIFI, large thrust; life 8 hours