Part of Sony's worldwide bestsellers.
It also seems the xx9 units were the ones that sold better, better than the CDP-X555ES or ultimate CDP-X505ES...
For half the price, you'd get 90% of a CDP-X779ES.
What you did not get was ultimate details : Twin-Core transformer, XLR outputs, the coaxial digital out or a super-beefy power-supply.
What you did get on top of a truly unbeatable bargain was a complex system of CD filing called "Custom File", all sorts of programming modes... and a lot more buttons on the front.
However, the rest is nearly the same as a CDP-X779ES : "G" base drive, "G" tray, GIC analog LPF, sapphire bearing and BSL motor, copper-plated chassis 'n all - and the bargain worked very well for there are thousands of X559ES and 555ESA still playing around the world.
The digital filter is a CXD-2560 ; the digital to analogue chip is a CXD-2562 and the laser block a KSS-272A, the latter being used on all players of the series (X779ES, X559ES, X339ES) and quite a few others.
Available as CDP-X559ES worldwide and as CDP-555ESA in Japan ; the X559ES in black with matte square sideburns or gold with shiny rounded sideburns, the 555ESA with rounded sideburns whether the player was black or champagne.
12,5 kilos of long-lasting and affordable high-end.
Nudies of the CDP-555ESA .