Spdif cable construction.

See this article.

http://www.positive-feedback.com/Issue14/spdif.htm

I've compared longer to shorter and at least 3 various designs and it's very hard to tell the difference, cable theory notwithstanding...I use a .5 meter silver solid core AQ (VDM5) from the streamer and an almost silver one meter (VDM3) from the CD spinner...swapped 'em, compared 'em, and the result was they both work very well to get them little digits to the DAC...the DAC washes the digits, dries them, irons their tiny shirts, organizes them into properly disciplined little lines headed for the exit, and off they go.

The only reason I asked was I read multiple places about having 1.5 meters is ideal? Is this true?

Yes it's true...or maybe not...

Depends on the input receiver of the DAC. I have had coax runs of 30 ft and heard no diff.