"Paul L" wrote in message
om...
My DVD player and my digital reciever have both coaxial and optical jacks.
Which connection should I use to get better sound quality or are they all
equal?

The coaxial connection is superior, although modern digital receiver chips
have narrowed the difference.

In the service manuals for certain digital preamps, Sony instructs that the
adjustment for harmonic distortion must be performed with a signal source
delivered by the coaxial input. This shows that in some cases, the digital
input receiver can suffer with an optical connection, in a measurable way.