XA7ES is a great player, no doubt. The SCD1 is better (I have both) but it's a lot more $ too. IMHO, forget all the silly tweaks above (incl. power cord), and if you want to adjust the sound, just get an outboard DAC. Something like the KandKaudio.com RAKK DAC would be my recommendation. Still, the internal DAC is very nice in XA7ES. Note the XA7ES has a true differential balanced output, none of the current sony players do that (incl. SCD-1 - it derives the balanced out from some chips at the end of the signal chain).
-Ed
-Ed