From top to bottom:
Music Server built with Raspberry Pi 3, 192khz / 24bit DAC, HD 500Gb and amber LCD Display. The player is Volumio 2.
Pre Amplifier with gain and tone control.
Power Amplifier with 2 x LM1875 (2 x 20W RMS). VUs rebuilt from units purchased in the net. The scales were cut to fit the cabinet size.
Metal case with brushed acrylic panel. The panel measures 24cm x 5cm.
Golden knobs originally made for guitar.
Separate 2 x 25V power source for Power Amplifier.
https://www.youtube.com/watch?v=eqxT0qkwPDU
Cool