Y pa' que veas que no hablo por hablar...
1. What is S-Video?
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S-Video is one of the high quality methods of transmitting a television signal
from a device such as a Camcorder, VCR, or a game machine (PSX/Saturn/SNES
etc). It separates the color information (Chrominance) from the brightness
(Luminance), which prevents nasty things like color bleeding and dot crawl,
and helps increase clarity and sharpness. You can greatly improve the image
quality of the PSX by simply converting to S-Video.
2. What are other options besides S-Video?
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A. Composite (most common)
By default, most electronic devices that hook up to your television send a
"Composite" Signal. This is by far the most common of all 4 outputs. The
cable has 3 jacks: yellow,white,and red. One jack sends the audio (left),
the second the stereo (right), and the third the video, respectively. The
picture quality is decent but pales in comparison to S-Video or RGB. The
US PSX only comes with a Composite Cable.
B. R/F lead
R/F is the worst you can get in terms of picture quality. It hooks up to
your cable, and the picture sucks.
C. RGB
RGB is the absolute best in picture quality. Better than S-Video. The
reason why RGB looks so great is because there is no additional decoding
involved by the monitor. (The PSX inherently uses an RGB color system)
http://www.vidgames.com/ps/hints/svideo.html 
Por que mi XBox (PAL) traia ese cable y luego aparte un adaptador scart(euroconector). Con este cable ya flipo con los graficos. 
