@PeteB, @rastus: I just received delivery of the linear power supply as the photo on post #37 above (previous page) that it made me very surprised, the sound background now is really quite, sound stage is really thick, sound image is full, more detailed, solo sound by guitar, flutes,... I was very crazy when making decision due to its price but I am really happy.
Its output is 9VDC-3A feeding for my USB DAC SMSL M8.