Does the 1.5m 75ohm rule apply to 110ohm?

rja


Yes there is a thing to watch for and that’s digital reflection (jitter?) this is said to be reduced when the interconnect is no shorter than 1.5mt, I think this would also apply to aes/ebu.
Can you link Al’s (rip) post on this please?

Cheers George

IMHO the digital reflection on SPDIF cables is primarily due to the impedance mismatch when using RCA connectors. If using 75 ohm bnc connectors this "reflection" should be very minimal and length should not be much of an effect. Length should also not be important for aes/ebu cable if the 110 ohm spec is respected.

Because you have heard it many times from audiophiles and cable vendors doesn't make it true.

mike, thanks for your useless input on this subject.
Please don’t post to my threads if you intend to be negative.

1. I’ve never heard it from a cable vendor.
2. There was at least one scientific paper pointed out by Al Marg concerning this issue.
His insights were frequently useful, always lucid. I believe he was an EE and audiophile so he knew his stuff.

oldears, I agree that bnc connections are probably better than rca because they are generally 75ohm although they come in other values as well.