![Image](https://i.imgur.com/Cj1cuhU.jpeg)
On the floor (l-r): SBooster PSU (DAC), CD player with Tomanek PSU on top (Tinkerboard) and the Sabaj monoblocks.
Middle shelf: Schiit Wyrd, Tinkerboard, Alva Duo phono stage on top of DacMagic DAC, P50sa preamp.
Geek talk: USB cables are AQ Carbon from TB to Wyrd, DH Labs Silver Sonic from Wyrd to DAC.
I upgraded the Tinkerboard to Volumio V3, the new OS has markedly better SQ and is faster. Compared it directly with the Allo DigiOne SIG and the USB-connected Tinkerboard was a clear winner.
Also briefly tried the Sabaj A10d DAC here and the results are promising, unfortunately the USB input requires a USB-C connection and the smartphone charge lead I had to use was not allowing the DAC a fair chance to give its best. Off to Amazon for a suitable cable.
With the Tinkerboard in place, overall sound quality has also taken a solid step in the right direction and the Class D amplification is responding nicely with a slowly-emerging refinement.
![Uber Geek :ugeek:](./images/smilies/icon/ugeek.gif)