Topping D50
Aug 16, 2019 at 2:05 AM Post #826 of 1,054
After reading so much about I got the idea this DAC has analytical digital sound with listener fatiguing. If so it would not be good match for me and my focal clear. Any idea it is better with new D50s?
Making conclusions about sound impact of one of the sound system (source-to-ear) component based on READING does not sound correct :)
To me D50 sounds very musical and detailed at the same time. Not fatiguing at all. I listen to it with headphones. A900x, W5000 both sound differently but great.
 
Aug 16, 2019 at 2:08 AM Post #827 of 1,054
I'm feeding my Topping D50 from the USB output of my Raspberry, playing PiCorePlayer.

What I don't know if it's possible for the display to also show the files' bitrate too, besides the oversampling, which does show.
My D50 does not show PCM bitrate also. Out of the box. Looks like they removed bitrate display starting firmware 1.02.
 
Aug 20, 2019 at 2:02 AM Post #829 of 1,054
https://www.qualcomm.com/products/csr8675
In the specs of CSR 8675 they don't list LDAC.
So what's going on? Do they implement a way to convert LDAC into APTX HD within android platform?
If so any loss of audio bit data in the process?
 
Aug 22, 2019 at 11:34 AM Post #830 of 1,054
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.

This will vary from device design to device design. Depending on the quality of the D50 design, it may be able to deal with the power fluctuations that are very common with cheap USB power supplies, or it may not. I personally did not notice a difference between a supposedly-good power supply (iFi iPower) and a cheap one with the D50, but I didn't A/B it, and don't care to. The better power supplies (particularly for DC->AC conversion, like in UPS systems) seem to help with the longevity of the equipment, which is important to me.
 
Aug 23, 2019 at 10:49 AM Post #831 of 1,054
After testing few opamps on my amp with D50 found OPA2111KP to have best synergy it pairs very well with OPA1612A (DAC)
second best-OPA2134PA ,Topping A30 (2xOPA2134PA+2xOPA1611) should pair well also
other opamps tested :
OPA2107 (recessed vocals)
MUSES8820 (doesn't pair well -too much bass)
LME49860NA ( -- I I -- )
OPA2604 (sad)

not yet tested
Burson dual V5i
OPA1612AID



Discrete Op Amp :
Sparcos SS3602 dual (fail/DOA awaiting replacement)
Sonic Imagery Labs 994Enh-Ticha DUAL (incoming)

I apologize if this is an old question, but havent been able to find information on this - with the D50 and rolling opamps, is it easy to do (simply pull/plug and play) or harder (soldering required)? Thanks.
 
Aug 23, 2019 at 2:00 PM Post #834 of 1,054
There is a third option too, which I think is the best in all aspects: provide balanced outputs directly from the DAC to outside the Topping.

Then implement a proper linear supply to start with for the output stage, and experiment both with discrete and opamps options.

Hopefully that is the path I will follow.
 
Aug 23, 2019 at 2:37 PM Post #835 of 1,054
There is a third option too, which I think is the best in all aspects: provide balanced outputs directly from the DAC to outside the Topping.

Then implement a proper linear supply to start with for the output stage, and experiment both with discrete and opamps options.

Hopefully that is the path I will follow.

Is there a thread or website that elaborates on this? I am not sure I understand --is it like almost somehow bypassing the Op Ams/output stage onboard the Topping into another board of some sorts?
 
Aug 23, 2019 at 3:08 PM Post #836 of 1,054
Is there a thread or website that elaborates on this? I am not sure I understand --is it like almost somehow bypassing the Op Ams/output stage onboard the Topping into another board of some sorts?

No thread yet, maybe when I modify mine.

Yes, you bypass the whole output stage, which is powered by DC-DC supply.
 
Aug 27, 2019 at 7:36 PM Post #838 of 1,054
Aug 28, 2019 at 9:59 AM Post #839 of 1,054
DS50s is live at Drop for $200! My Atom is screaming for it...:)
 

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