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(Unofficial) Topping D50 III DAC review and measurements

Thanks, so eventually it might indeed be possible to route the SPDIF through the XMOS, but for good reasons developers hesitate to try to get this going.
In case XMOS would develop an example application that people can copy things may be different. This clearly would be added value for the XMOS.
In the case of the D50-III, I don’t even know if SPDIF is routed through the XMOS chip.
 
Too bad that this model will most probably show OLED display burn in like D50s, since the same screen is displayed permanently even on AUTO mode
 
Too bad that this model will most probably show OLED display burn in like D50s, since the same screen is displayed permanently even on AUTO mode
It's not an OLED display, it's LCD. You can see the screen on even when the unit is OFF just to display a dot in the lower right corner.
This doesn't have the contrast of an OLED display.
 
Too bad that this model will most probably show OLED display burn in like D50s, since the same screen is displayed permanently even on AUTO mode

Sorry to be rude, but did you read the manual? If you want the D50s screen to turn off after 30 seconds you don't put it in AUTO!
Screenshot 2024-05-22 125450.png
 
It's not an OLED display, it's LCD. You can see the screen on even when the unit is OFF just to display a dot in the lower right corner.
This doesn't have the contrast of an OLED display.

The Topping manuals for the D50s & D50 III both claim its an OLED screen.

I've read a few places this is the screen for the D50s.
 
The Topping manuals for the D50s & D50 III both claim its an OLED screen.

I've read a few places this is the screen for the D50s.
There is no way an OLED has this poor black levels. All the lights are off in the room, only some faint light comes from further away.
Unit is off:
IMG_20240522_201904.jpg
IMG_20240522_201716.jpg

The whole screen emits some light just because of the dot in the corner is active. This is typical LCD behavior with no mini-LED zones.
 
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There is no way an OLED is has this poor black levels. All the lights are off in the room, only some faint light comes from further away.
Unit is off:
View attachment 370806View attachment 370807
The whole screen emits some light just because of the dot in the corner is active. This is typical LCD behavior with no mini-LED zones.
could also be a poorly designed GUI which doesn't make use of OLED's per-pixel illumination by having a gray background :)
 
New firmware with special instructions, safest is to install 1.28 first then 1.3
From what I read, the only functionalities changed since v1.21 are
---------------------------------------------------
**V1.23 HV:2.5 (May 13, 2024)**
---------------------------------------------------
1. Added the option to switch between preamp mode and DAC mode.
2. Added the option to switch between UAC1.0 and UAC2.0.
3. Added the function of saving PEQ settings in user-defined settings C1 and C2.

Rest is bug fixing.
 
New firmware with special instructions, safest is to install 1.28 first then 1.3
Probable mistake in the firmware instruction notes:

Important Note: For D50 III product users with serial numbers starting with 2310, 2403, or 2405 and firmware version V1.28 or earlier, it is crucial to upgrade to V1.30 before updating to V1.28. Directly upgrading to V1.30 might cause UAC1.0 to fail to start.​


Says that its crucial to upgrade to V1.30 before updating to V1.28 and this is likely (?) revearsed. Rather it should say (I think) "....it is crucial to upgrade to V1.28 before updating to V1.30".
 
Rest is bug fixing.
Well, that's great. Who wants bugs?

1.28 will obviously be needed for future versions to expand how much can be written in the firmware.

1.3 fixed DSD sound problems as well

Also note:
"To upgrade the firmware, the product must be set to DFU mode: Power on while holding down the button on the left side of the front panel to enter DFU mode."
 
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