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Topping D50

Discussion in 'Dedicated Source Components' started by junki, Apr 8, 2018.
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  1. carlmart
    Of course Topping is using a DC-DC stage for the output amp stage, converting 5v into +/-8v. Nobody is denying that, on the contrary. That was talked here several months ago.

    My suggestion was to use an external output stage altogether, straight from the DAC, which can still have linear DC if you use a linear power supply on the Topping.

    As the output from the DAC is balanced there shouldn't be much trouble. Then connect that to an external analog stage, with a fully regulated linear supply, higher voltage, like +/-15v.
    Last edited: Aug 4, 2019
  2. System54
    I measure Noise on the switching rails:
    40mv -8v
    20mv +8v
    50mv 1v xmos
  3. Ripper2860
    I won't argue that a Linear Power Supply is better than a switcher. My question is how much of an audible difference can a 'better' LPS like the Topping P50 ($119) really have over something like a Jameco wall-wart LPS ($15). Where is the point of diminishing returns when a 'better' LPS is used with a $250 DAC? :thinking:
    Last edited: Aug 5, 2019
    Baten likes this.
  4. KonstantinN
    Which (if your measurements are correct) with OPA1612 PSRR of 120-140 dB means 4-40 uV noise impact on the output - peanuts.
    Baten likes this.
  5. carlmart
    Has anyone used or is using a Topping D50 connected to a Raspberry running PiCorePlayer?
  6. KonstantinN
    Why? Any issues? I used to use it with Synology NAS and iPhone - works like a charm.
  7. carlmart
    Yes, some issues. The one I have right now is how to make the Raspberry USB output work to feed the Topping.

    For some reason no sound comes out of it.

    The PiCorePlayer configuration is done through the web, and one thing you can select is your audio output.

    Only a few Raspberry plugable DACs are listed, but there's an "USB audio" output you can select. That's what I did.

    The results was no sound.

    I did change to "Analog audio" output, and connected the Raspberry headphone socket to the power amp, and the audio was there alright.

    So I wonder what might be happening.
    Last edited: Aug 8, 2019
  8. carlmart
    OK, I could solve that problem thanks to a helping friend here.

    That was lucky, because the folks at the LMS PiCorePlayer forum are not very helpful and quite arrogant with those than don't seem to know the basics.

    In any case, you do have to add the D50 data on the setting. Let me know if you have that problem.

    When done that I could get very high quality audio.

    There are two thing I couldn't solve yet: how to handle DSD signals with PCP and how to make it identify cue files, for those CDs that you ripped as one whole recording.
  9. carlmart
    Can anyone answer for sure if the D50 is really native DSD or if they make a conversion?
  10. Baten
    It's ESS Sabre chip. The implementation of it is basically secret.

    But, Mishka from HQplayer showed increased performance and THD with DSD256 and DSD512 so it for sure doesn't hurt anything.

    Delta sigma can easily process DSD anyway, the 9038(mobile) chip surely does it in a proper way I wouldn't worry~
  11. kaushama
    Can this be powered by IFi Iusb 3 and achieve better sound quality than LPS? Topping P50 power supply too very appealing. However Iusb 3 is claimed to supply very clean USB power and there are two power only USB ports.
    Is this better than IFI IDSD BL as a standalone DAC?
  12. Baten
    Don't believe all the bull**** online, man. It's 5V power, it's NOT rocket science lol.
    The D50s and D50 have linear regulators already filtering the power input. "improving" on it will do absolutely nothing unless you are feeding it absolute crap.
  13. kaushama
    Really? So many of this threads posts are about improvements in sound quality they got changing the power supply.
  14. Slade01
    Listen, I have my d50 plugged into my samsung charger/adapter which is a 5v plug and its clean and fine. Lol.
    Baten likes this.
  15. Baten
    *Maybe* for bigger psu but not for teeny tiny 5V power
    Last edited: Aug 14, 2019
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