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Pro-Ject Pre Box S2 digital DAC

Discussion in 'audio' started by miero, May 9, 2017.

  1. left channel

    left channel Well-Known Member

  2. JohnW

    JohnW Trade: Lakewest

    Hey, statements like that can get you into trouble! :p
     
    BertilR likes this.
  3. left channel

    left channel Well-Known Member

    :) Yes. One must be carefully PC around the Blue Meanies.
     
    BertilR likes this.
  4. lonek

    lonek Member

    Thanks Left channel, I feel such relief :)
     
  5. lonek

    lonek Member

    Hi again;
    Tell me please one more your secret :)
    What "language" is native for S2 DAC - DSD I guess?
    Because I want to send "him" exactly what "he" likes the most (except MQA manipulations of course) :)
    Stream that must be minimally preprocessed inside S2 - before converting to analog.
     
  6. left channel

    left channel Well-Known Member

    Everyone's ears are different. Find what sounds best to you. This feature-packed little DAC will allow you to explore. Some cannot hear a difference between 320k MP3 and Hi-Res 24/192 FLAC files, while others will not go lower than 24/96. Some love MQA, while others find it too loud and overdriven. Some love the detail in DSD, while others find it too cold and analytical. Take your time and enjoy exploring all the features of your Pre Box S2 Digital.
     
  7. left channel

    left channel Well-Known Member

    Using the external power supply makes a big improvement to the USB sound. Adding a USB REGEN makes an additional small improvement, but not as much as the external power. As an experiment I've ordered a linear (non-switching) adapter to replace the stock adapter. I'll post a report here.

    Oh and one more thing: I officially can no longer call this product the "S2". Because I've placed an order for a Pro-Ject Amp Box S2.
     
  8. MagnusH

    MagnusH Well-Known Member

    I ordered and got an iFi iPower, and have tested it today. Even with the improved power I had before from the iFi nano iUSB, the iFi iPower took the DAC to a new level. So now I have the iFi nano iUSB3 for USB reclocking and cleaning, and iFi iPower for stable power (connected to the micro USB om the DAC). Probably a little overkill, but it sound awesome :)

    I did some quick A/B also, if the S2 DAC sounds like a 5 directly connected to the computer, adding the iFi iPower took it to 8, adding USB reclocking and cleaning took it to 9. I reserve the 10 for a high end quality linear power or something like a ultraRendu (which would be totally overkill and costs more than the DAC, but still)
     
    left channel likes this.
  9. lonek

    lonek Member

    Hi.
    Could you send also to me the newest beta firmware (DSD swap)?

    Thank you;
    Lonek
     
  10. left channel

    left channel Well-Known Member

    Happy to. PM sent. Please let us know how your unit sounds after updating.
     
  11. the_bat

    the_bat pfm Member

    I know this thread is about the pre-box, but is there any information on the S2 DAC only box? The info on the pre-box stresses the dual mono construction and the Sabre ESS9038 dual DAC. Is it a reasonable assumption that the DAC only version doesn't have these, and how much difference is it likely to make in practice?
     
  12. left channel

    left channel Well-Known Member

    You mean the DAC Box S2 + (with a space between "S2" and "+"...)? We'll have to ask @JohnW — eureka, the XenForo tagging works! — but this appears to be another of his designs.

    The data sheet says "D/A converter...1x ESS9038Q2M", so yes it has the same chip but not the dual DAC design of the Pre Box S2 Digital. On that line the data sheet also says "32-bit PCM 768kHz / DSD512", but this is clarified in the user guide as being only via USB, while optical and coaxial are limited to PCM up to 24b/192 kHz, which are the same specs as the Pre Box S2 Digital. It also has USB filtering like the Pre Box S2 Digital design.

    Contrary to what some retailers have been claiming in their advance offers, it does not do MQA. Overall this product contains a subset of the Pre Box S2 Digital features, and may be all many customers will ever need.
     
  13. lonek

    lonek Member

    Thanks a lot :)
     
  14. MagnusH

    MagnusH Well-Known Member

    I also think its single ESS9038, while the S2 Digital has dual mono ESS9038. Not sure how much of a difference that makes though.
     
  15. BertilR

    BertilR Member

    Not everyone has got the nice capacitor, my ones are blue but of a slightly poorer specification from the company KEMET K50. http://www.mouser.com/ds/2/212/KEM_A4067_A750-1102650.pdf
     
  16. BertilR

    BertilR Member

  17. BertilR

    BertilR Member

    Not everyone has got the nice capacitor, my ones are blue but of a slightly poorer specification from the company KEMET K50. http://www.mouser.com/ds/2/212/KEM_A4067_A750-1102650.pdf
     
  18. Bourneendboy

    Bourneendboy pfm Member

    Would this be the recommendation for a headphone system or would the head box S2 digital be the better option? Is the DAC the same in both?
     
  19. JohnW

    JohnW Trade: Lakewest

    Left Channel,

    If thats you in your profile picture them I'm MORE then happy to come over in person to check your DAC has the correct Caps fitted :D
     
  20. JohnW

    JohnW Trade: Lakewest

    The S2 Digital is the better DAC due to the dual ESS's & extra PSU's.
     

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