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Topping D50

Discussion in 'Dedicated Source Components' started by junki, Apr 8, 2018.
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  1. starence
    Last edited: Jul 25, 2019
  2. Vosya
  3. ticoss
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  5. mikeypas
    Not too long ago received my Topping D50 and very happy with it. Matched it with Little Dot MkIII also from drop. Very happy with the sound. Despite the discussions here regarding its worth, I’m interested in the P50 even it improves SQ just a little my question is the P50 is clearly meant to match the D50, and I assume from the photos on the back of the unit, can be connected via the USB output. However, would the Little Dot mkiii also benefit from being powered by the p50? First of all, is it appropriately matched to power the ldmkiii? Second, since it’s not USB powered , would you need a special connector to go from the LD to the p50?
  6. Baten
    @mikeypas the P50 only does 15V and 5V, says right there in its specifications and description..
  7. mikeypas
    I apologize in advance for being very new at all of this. I’m not sure what the LDMKIII requires?
    I have gone to the specs but again I’m very green to all of this.

    That being said , would the p50 provide me benefit for the d50 if the ldmkiii is still using regular power?
  8. Baten
    I personally don't "believe" in upgrading power supplies especially for 5V power but others might not agree. It's not rocket science
  9. carlmart
    You may not believe it, but a power supply is one of the most important parts in audio.

    In this case the important thing is that the power supply does not introduce noise in to the Topping, that the voltage is accurate and steady, and that the current that the Topping gets is what it needs.

    Some subjective reports sustain that a linear supply is better place to start here than a switching one. But I haven't seen any curves or figures that support that.
  10. mabuk
    Light - Man and Baten like this.
  11. KonstantinN
    I am not going to lecture you. And do not want to offend you in any mean. Instead, let me ask you a question that may give you an idea: how do you think +5 volt that is supplied to D50 becomes -8 and +8 volts supply rails for D50 opamps?
  12. Ripper2860
  13. KonstantinN
    Well, someone may say switching power converter is a kind of magic (C).
    Ripper2860 likes this.
  14. 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
  15. System54
    I measure Noise on the switching rails:
    40mv -8v
    20mv +8v
    50mv 1v xmos
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