Gustard X20proThe dac has no usb The 120/240v switch was removed
The fuse was removed
The on off switch was removed All these mods were done BY Ric Shultz The dac was fully modded by Tweakaudio Ric Shultz 1. bypass the fuse holder for even better sound. 2. Remove the hardware from the transformers and raise them off
the chassis using doubled up carboard donuts.
3. Twist all AC wires tightly (both into and out of both transformers and between front and back boards).
4. Remove the input AC filter. 5. Remove the 110/220 volt selector switch. 6. Remove 5 AC connectors inside the unit. 7. Remove the power switch. 8. WA Quantum Chips on power supply caps.....noticeably more detailed and transparent. 9. Damping of loose mounted caps, many electrolytic, clock, etc...... more focused and clear and real. 10. Changing rectifying diodes on output board to damped soft recovery types......OMG, so much more 3D and inner detail 11. Remove the digital cable between the board and install low jitter Crystek clock right at the DAC with modified Wima bypass cap with WA Quantum chip installed. Ric also added his discrete output stage The dac has some light scratches I would rate it 8 out of 10 $30 for shipping
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