A few months ago, I replaced my Teac UD-501 with a Gustard x20Pro/Singxer SU-1 combo.
It was a huge leap in sonic performance. I've since cleaned up the SU-1s' power supply by installing the 4.5V SBooster Ultra board between the internal power supply and Singer main board.
It was a huge leap in sonic performance. I've since cleaned up the SU-1s' power supply by installing the 4.5V SBooster Ultra board between the internal power supply and Singer main board.