The problem with CDPs is on-the-fly reading. If you added antiskip option to help the CDP not skip during errors or heavy vibration, the sound was compressed (I'm not commenting if this is audible). Sony (the company who invented
ESP) decided to leave out any circuitry solution and just make a 20kg player with a barrage of clever structural engineering solutions to battle the vibration issue. So did Denon, Philips, Pioneer etc. One has to ask himself if they went to all that trouble just to fill in their brochures. Not as simple or cheap as adding two binding posts and writing a marketing blob about bi-wiring.