HiFace RCA v HiFace BNC
Posted by: Holty on 16 July 2010
Are there any differences? Times when one would be better suited than the other?
Posted on: 16 July 2010 by Guido Fawkes
BNC is my favourite connector - it always seems a very assured connection.
Posted on: 16 July 2010 by JYOW
The main reason for BNC is its ability to maintain 75 Ohm impedance which is the SPDIF spec. RCA connectors in general are not 75 Ohm.
I believe this concept is pioneered by Chris Sommovigo of Audiovox Illuinati fame.
Cannot post link here but google Black cat cable and 75 Ohm and there is an article explaining this concept.
I believe this concept is pioneered by Chris Sommovigo of Audiovox Illuinati fame.
Cannot post link here but google Black cat cable and 75 Ohm and there is an article explaining this concept.
Posted on: 17 July 2010 by pcstockton
quote:Originally posted by JYOW:
RCA connectors in general are not 75 Ohm.
How about Toslink?
Posted on: 17 July 2010 by JYOW
Not sure, I am not an engineer but TOSLINK is optical, not electrical. So there should not be any impedance issue, may be wavelength related
Posted on: 17 July 2010 by pcstockton
good to hear.
No impedance issues, no ground loop issues, apparently "quieter", why doesn't everyone prefer it?
No impedance issues, no ground loop issues, apparently "quieter", why doesn't everyone prefer it?
Posted on: 17 July 2010 by rich46
quote:Originally posted by pcstockton:the whole concept of 75 ohm impedence is a difficult concept for non electrical customers, bnc is a good connector but the phono is also in the area of audio. the main considerations is the construction and the quiality of parts.quote:Originally posted by JYOW:
RCA connectors in general are not 75 Ohm.
i bet that the sale of naim increased when they added phono, why customers wanted it
How about Toslink?
Posted on: 19 July 2010 by Elektrostat
WBT claims that their NextGen-Cinch-connectors are true 75 Ohm and can be used for Digital and Video. Link:
http://www.wbt.de/index.php?id...ID=77&tt_products=64
For best results the connector and the RCA-socket should be WBT-NextGen. On both sides for example HDX and DAC.
http://www.wbt.de/index.php?id...ID=77&tt_products=64
For best results the connector and the RCA-socket should be WBT-NextGen. On both sides for example HDX and DAC.
Posted on: 19 July 2010 by JYOW
Yes I remember those plugs are very good. But I didn't know they were 75 Ohm all along.
I recall reading the Impedance is determined by the distance/circumference of the different strands, and that RCA just could not achieve that?
I recall reading the Impedance is determined by the distance/circumference of the different strands, and that RCA just could not achieve that?
Posted on: 19 July 2010 by JYOW
there is actually an article in Blue Jeans cable web site with the title
"Is there Really a True 75 Ohm RCA Plug?"
"Is there Really a True 75 Ohm RCA Plug?"
Posted on: 19 July 2010 by Andy S
As to the question about why not optical. I believe it's because there is more jitter inherent due to the need to convert to/from optical.
Posted on: 23 July 2010 by AMA
This does not explain why various tosslinks sound differently. This suggests that multiple reflections can be a source of distortion/jitter and the material/treatment of fibers does matter.
Posted on: 23 July 2010 by Andy S
The signal goes through a glass (or plastic) interface a few times. I'd expect that to add to jitter if the ends are not well made as the light will be scattered slightly as it goes through the interface. By how much I don't know though....quote:Originally posted by AMA:
This does not explain why various tosslinks sound differently. This suggests that multiple reflections can be a source of distortion/jitter and the material/treatment of fibers does matter.
Posted on: 23 July 2010 by Justin9960
Chaps,
Any thoughts if sound quality would reduce significantly with a 7 metre length of BNC from iMac to DAC?
Thanks
Justin
Any thoughts if sound quality would reduce significantly with a 7 metre length of BNC from iMac to DAC?
Thanks
Justin
Posted on: 23 July 2010 by js
yes. If it's a requirement, get a streamer like SB touch, Sonos or better.
Posted on: 24 July 2010 by AMA
quote:quote:
Originally posted by AMA:
This does not explain why various tosslinks sound differently. This suggests that multiple reflections can be a source of distortion/jitter and the material/treatment of fibers does matter.
The signal goes through a glass (or plastic) interface a few times. I'd expect that to add to jitter if the ends are not well made as the light will be scattered slightly as it goes through the interface. By how much I don't know though....
Agree, the quality of fiber tips play the key role in transmission. But I believe the fiber material and reflection quality of the fiber shield are also contributing to transmission quality. As far as I know building high quality tosslink is more complicated than regular coaxial.