Up until maybe 3 years ago, I had a PD 65 with extensive Musical Concepts mods (including an outboard PS), which I was using as a transport, but the laser finally died and no longer made.
I replaced it with a Marantz HD CD-1 but also use a Oppo 105 exclusively for SACD/DVD-A, but a couple years ago on Ebay, I came across upgraded Linear Power Supplies/Modules for it. First I replaced the OEM IEC with a Furutech rhodium with a pure silver tail that connects to the power supply board and a jumper to replace the 110/220 switch. After breaking that in I compared red book to the HD CD-1: no longer using the HD CD 1, which saved me from using a preamp and the associated power cord and interconnect, shelf, vibration control...
I replaced it with a Marantz HD CD-1 but also use a Oppo 105 exclusively for SACD/DVD-A, but a couple years ago on Ebay, I came across upgraded Linear Power Supplies/Modules for it. First I replaced the OEM IEC with a Furutech rhodium with a pure silver tail that connects to the power supply board and a jumper to replace the 110/220 switch. After breaking that in I compared red book to the HD CD-1: no longer using the HD CD 1, which saved me from using a preamp and the associated power cord and interconnect, shelf, vibration control...