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‘Double Dac?’

Discussion in 'audio' started by Ian Stafford, Nov 17, 2020.

  1. Ian Stafford

    Ian Stafford Active Member

    Sorry if this is a stupid question:
    I have a Fiio x5 3rd gen that I play straight into my amp. If I play it through an Arcam irDAC will that effectively ‘double dac’ it or does the Fiio dac become disabled?
  2. htm_1968

    htm_1968 pfm Member

    Not sure I understand the question here. A DAC is a digital to analogue converter, so it outputs an analogue signal. For the Fiio to output a digital signal to your Arcam DAC it cannot be passing the signal through its own DAC by definition.
  3. Vinny

    Vinny pfm Member

    A DAC can only read and decode a digital signal input, so the Arcam will be fed what it "sees as nonsense".

    That apart, what voltages are involved? Unless a digital signal voltage is at or higher than line level, you will potentially damage the Arcam by sticking line level volts into the digital in. I appreciate that I could search for the voltage of a digital signal, online, but I have no idea otherwise.
  4. Amber Audio

    Amber Audio This is the Day

    Fiio X5 use a 3.5mm CoAxial adapter cable or Mini USB to Mini USB cable to iRDAC

    Fiio in DAC mode - check the User Guide for how

    Fiio is them just acting as a Digital Network Player/Streamer and all the DAC action happens within the Arcam
  5. Ian Stafford

    Ian Stafford Active Member

    Told you it may be a stupid question!
    The signal out from the fiio must be analogue and therefore using its inbuilt dac. I suppose I’m wondered if I could use the arcam dac instead if the fiio’s.
    I think I’ve answered my own question after some googling, I need to use the digital (usb out) out to the arcam.
  6. Ian Stafford

    Ian Stafford Active Member

    Thank you, it’s now clear!
  7. Amber Audio

    Amber Audio This is the Day

    No worries, the only stupid question is the one left unasked - so I was told by a wise man
    Salamander and Vinny like this.
  8. Vinny

    Vinny pfm Member

    Not stupid, but poorly worded unless the reader is very familiar with the kit, and nothing is ever obviously poorly worded by the writer.
  9. Beobloke

    Beobloke pfm Member

    You could always buy a small Analogue To Digital converter and use this to re-digitse the analogue output of the Fiio so that you can then use the Arcam to turn it back to analogue again.

    That could be fun. :)
  10. Amber Audio

    Amber Audio This is the Day

    Like a baby crying out for its father

  11. mansr

    mansr Objectionist

    S/PDIF is 0.5 Vpp, but it's very unlikely that a receiver would be damaged by normal line level signals.
  12. deebster

    deebster Half Man Half Biscuit

    This is what I do with a Behringer UCA222 (cheapo Chinese DAC, which also functions as an ADC) - run USB into it and optical out to a Rega DAC, so the Behringer acts only as a USB to SPDIF converter.

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