Hello Just bought me a new digital speaker management box (Marani Dpa 480)
My networkplayer have both analog balanced out and spdif out. I am planning to use the spdif.
Spdif is 75 ohm and aes is 110 ohm.
Can i use a 75 ohm cable without trouble or do i need som transformer feks this ?
My networkplayer have both analog balanced out and spdif out. I am planning to use the spdif.
Spdif is 75 ohm and aes is 110 ohm.
Can i use a 75 ohm cable without trouble or do i need som transformer feks this ?
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You need the same type SPDIF interface at both ends of your connection, or else you may need an adapter like the one in your post.
The adapter you show is for balanced-line AES type of SPDIF which is 110-ohm characteristic impedance (consumer SPDIF is typically 75-ohm). Mostly AES is only used for professional applications where there may be long cable runs and or in some potentially rather electrically noisy environment. Using it requires a different type of cable than normal home SPDIF coaxial cable.
For most home use, conversion to the balanced AES version of SPDIF is not needed. Also, some of the non-audio data bits in professional AES type SPDIF have different meaning from that used in the more common consumer version of SPDIF. That may or may not be a problem in a particular situation. In addition, there is an unbalanced 75-ohm version of AES. Voltage levels between professional and consumer versions of SPDIF may be different, so some level changing circuitry might be needed to interface the different standards depending on the requirements of particular audio devices being interfaced.
The above is a very quick answer, so please do ask if there are more questions.
The adapter you show is for balanced-line AES type of SPDIF which is 110-ohm characteristic impedance (consumer SPDIF is typically 75-ohm). Mostly AES is only used for professional applications where there may be long cable runs and or in some potentially rather electrically noisy environment. Using it requires a different type of cable than normal home SPDIF coaxial cable.
For most home use, conversion to the balanced AES version of SPDIF is not needed. Also, some of the non-audio data bits in professional AES type SPDIF have different meaning from that used in the more common consumer version of SPDIF. That may or may not be a problem in a particular situation. In addition, there is an unbalanced 75-ohm version of AES. Voltage levels between professional and consumer versions of SPDIF may be different, so some level changing circuitry might be needed to interface the different standards depending on the requirements of particular audio devices being interfaced.
The above is a very quick answer, so please do ask if there are more questions.
Agree to above, like to add that often there's is also a level issue.
The official voltage levels of S/PDIF are much too low for an AES input with their official sensititvity.
That said, often it works fine, because many practical AES inputs are sensitive enough for an S/PDIF output.
But if it doesn't work, this may be a cause.
Jan
The official voltage levels of S/PDIF are much too low for an AES input with their official sensititvity.
That said, often it works fine, because many practical AES inputs are sensitive enough for an S/PDIF output.
But if it doesn't work, this may be a cause.
Jan