External Power Supply For My Audiolab 6000CDT CD Transport

+1 for upgrading to a better transport instead. To make up your mind just compare the internal components of 6000 CDT to, for example Teac VRDS 701T or Jays Audio transports. 

A properly designed SMPS may have lower noise than a linear supply, but how much noise do they radiate to other equipment?

So, you want to ensure that every piece of gear, wire, and cable is properly shielded. Aside from that, I also dislike the heat generated by LPS. I had a 5V/1A LPS before, and the heat it produced was unbelievable—worse than my Class A/B amp. Btw, the toroidal transformer inside may hum.

@invalid Let me offer this - all power supplies are SMPS (they switch and the power is delivered in narrow current spikes with width dependent on the load). Some operate at 120Hz others at 100kHz and the best (like Rowland) at 1MHz. In linear supplies rectifier diodes get reverse polarized at the peak of 120Hz wave. For a moment they conduct in opposite direction creating big current spike. Faster diodes like Schottkys won’t help much since fast recovery (dv/dt) is even more dangerous. Narrow spike (fast snap back) contains pretty much all frequencies and will couple to any, even smallest inductance (like piece of trace). Some rectifiers like HEXFREDS offer slower snap back (softness of the diode). I don’t want to bother you with technical nonsense - just want to say that things are not as simple as they appear to be. Ears are the best guide.