DAC gallery

My DAC is finished! PCM1794 with three output modes. "Digital filter" is for typical oversampling, "OFF" is for NOS a la DDDAC and "Passive" is NOS with Abraxalito's Chelibidache filter -my preference.

Ten separate Salas' shunt regulators, a small TPA6120a2 headphone amp and a display https://www.diyaudio.com/community/...logic-display-for-wave-io.371967/post-6644547

It's a 2U rack chassis and there is no room for anything else inside...
 

Attachments

  • Front.JPG
    Front.JPG
    259.7 KB · Views: 421
  • Uncovered.JPG
    Uncovered.JPG
    618.4 KB · Views: 436
  • 3⁄4.JPG
    3⁄4.JPG
    456.1 KB · Views: 436
  • Stack.JPG
    Stack.JPG
    525.3 KB · Views: 386
  • Display.JPG
    Display.JPG
    138.6 KB · Views: 388
  • Like
Reactions: 9 users

Attachments

  • IMG_20230813_140350.jpg
    IMG_20230813_140350.jpg
    193.1 KB · Views: 221
  • IMG_20230813_142029.jpg
    IMG_20230813_142029.jpg
    324.9 KB · Views: 225
  • IMG_20230813_142057.jpg
    IMG_20230813_142057.jpg
    284.9 KB · Views: 219
  • IMG_20230813_142111.jpg
    IMG_20230813_142111.jpg
    293.8 KB · Views: 189
  • IMG_20230813_144154.jpg
    IMG_20230813_144154.jpg
    175.6 KB · Views: 177
  • IMG_20230813_144159.jpg
    IMG_20230813_144159.jpg
    240.7 KB · Views: 155
  • IMG_20230813_144206.jpg
    IMG_20230813_144206.jpg
    261.3 KB · Views: 149
  • IMG_20230813_144216.jpg
    IMG_20230813_144216.jpg
    259 KB · Views: 184
  • Like
Reactions: 3 users
My DAC is finished! PCM1794 with three output modes. "Digital filter" is for typical oversampling, "OFF" is for NOS a la DDDAC and "Passive" is NOS with Abraxalito's Chelibidache filter -my preference.

Ten separate Salas' shunt regulators, a small TPA6120a2 headphone amp and a display https://www.diyaudio.com/community/...logic-display-for-wave-io.371967/post-6644547

It's a 2U rack chassis and there is no room for anything else inside...
Nice build! Can't imagine it was easy to route all the internal cabling that nice and tidy.
 
Here’s my first Ian Canada build. RPI 4 8g, StationPi Pro, ReceiverPi Pro II, FifoPi Q7, ES9038q2m dual mono II, OPA 631 I/V, LifePO4 MkIII.

Took me about 3 months to design, and resource the parts.
 

Attachments

  • IMG_1049.jpeg
    IMG_1049.jpeg
    468.5 KB · Views: 88
  • IMG_1048.jpeg
    IMG_1048.jpeg
    550.9 KB · Views: 85
  • IMG_1082.jpeg
    IMG_1082.jpeg
    567.9 KB · Views: 81
  • IMG_1052.jpeg
    IMG_1052.jpeg
    457.1 KB · Views: 87
  • IMG_1042.jpeg
    IMG_1042.jpeg
    430.3 KB · Views: 83
  • IMG_1078.jpeg
    IMG_1078.jpeg
    496.1 KB · Views: 90
  • Like
Reactions: 1 user
Here is my streamer and DAC.
Based on:
1. RPI4 + shieldpi + Fifopi Q7
2. OS: Volumio + Tidal connect
3. PSU XFMR: 2 custom toroidy suppreme 60VA, each 6 secundairy voltages. 30Va R-core xfmr for RPI PSU
4. PSU: LM317 preregulator + 9 Jung-Didden supperregulators. All with sense connections up to millimeters from load, meaning mOhms of PSU output resistance
5. Salas L-adapter for 5V RPI (shielpi is having high capacity hybrid elektrolytics on board as well)
6. AD1862 DAC (based on MIRO's design). (PSU scoped at DAC powerpins is a flat line.)
7. IV- converter. Mirror based design with J-fet B1 output buffer at 10mA. +-2...4mV output offset. No global feedback.
8. Power management board:
- 4sec pressing ON-button = all switches on and RPI is starting up
- Once RPI switched on, output relay is activated (relay can be seen on IV PVB)
- Again pressing On/off button = all switches OFF, except for RPI
- RPI is safely shutting down. Once current consumption drops below set value, R-core xfmr for RPI is switched off as well.


In the weekend directly compared with my bluesound Node 2I. My DIY build has clearly more transparancy, when switching between Bluesound and my build using input selection on my preamp. The difference is quite clear, as if a piece of fabric is placed over the speakers with the bluesound.


Now I can start building the enclosure.
It will be very similar as the rest of my DIY system: https://www.diyaudio.com/community/...d-state-pics-here.96192/page-368#post-7159684
Plan is to have +-Diameter 50mm smoked grey polycarbonate window for the display.
 

Attachments

  • IMG_4926.jpg
    IMG_4926.jpg
    451.7 KB · Views: 85
  • IMG_4930.jpg
    IMG_4930.jpg
    417.8 KB · Views: 87
  • IMG_4928.jpg
    IMG_4928.jpg
    647.4 KB · Views: 81
  • IMG_4881.jpg
    IMG_4881.jpg
    716.3 KB · Views: 89
Last edited:
  • Like
Reactions: 3 users