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COAX Cable length 1.5 meters

There are many threads and articles suggesting the optimal length for a digital coax cable to be 1.5 meters (or a very short length). Now, what I am submitting to the those in the know, couldn't that length change depending on the materials used to manufacture the cable? Let's assume the cable has BNC connectors and measures exactly 75 ohms.

Belden coax w/ BNC uses a copper conductor and a tinned copper braid and a double-sided aluminum-on-polyester foil shielding. Recommended length by users is 1.5 meters.

The cable I am interested in comes terminated as 1.3 meters. It is OYAIDE from Japan.
http://www.oyaide.com/ENGLISH/AUDIO/products_category/digital_cable/pg532.html
The conductor is pure silver, with a Teflon dielectric and Foamed Polyethylene insulation. Shield is Copper foil + Silver plating copper. So, I ask you, wouldn't the materials influence the timing of the signal and thus the optimal length?
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lowrider57 OP
5,418 posts
 
Very nicely explained, Al. Thank you. In the case of the cable I have been reading about, it seems as though the manufacturer in Japan decided on a 1.3m length when it was added to their product line.
All of which is why I have said in a number of past threads that the recommendation of 1.5 meters (or a bit longer)
Yes, I’ve seen your post before.
After reading about the Japanese cable in question, the many positive user reviews, and their willingness to publish specs, perhaps they have found their cable performs best at this length. It is the only length available for BNC. The variable in the tests would be the DACs and power supplies being used.
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