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Maybe it's already been said, in which case I apologize. What is the advantage of pairing two DAC chips into an unbalanced device?
Using one DAC for each channel.Maybe it's already been said, in which case I apologize. What is the advantage of pairing two DAC chips into an unbalanced device?
Ok, but this simply shifts the question without solving it: why should pairing two DAC channels to obtain an unbalanced channel improve performance?Using one DAC for each channel.
Every doubling of DAC chips reduces noise by 3dB.Ok, but this simply shifts the question without solving it: why should pairing two DAC channels to obtain an unbalanced channel improve performance?
Jitter yes, but definitely no loss of coherence:It seems this could lead to a loss of coherence in the digital splitting of the two channels to be sent to the pair of DACs, and in fact in his measurements Amir found jitter problems.
I have to think about this.Every doubling of DAC chips reduces noise by 3dB.
That's because the signal sums coherently (+6dB) whereas noise sums incoherently (+3dB). Result is an effective 3dB reduction in noise relative to the signal.
Was this achieved from USB or does it S/PDIF?Jitter yes, but definitely no loss of coherence:
View attachment 314459
Both channels match perfectly in amplitude and phase.
Doubling the signal amplitude (in Volt) gives you 4 times the power (V*V/Z)I have to think about this.
Why should coupling two identical and perfectly in-phase final stages lead to quadrupling the power (+6 dB) and not simply doubling it (+3 dB)?
I hadn't taken into consideration the series connection of the two branches of the AK4493S because I thought it was a prohibited configuration, obviously I was wrong.Doubling the signal amplitude (in Volt) gives you 4 times the power (V*V/Z)
Until you find it there must be sure be a way to reset it to the original FW.Hi
Can someone please help and provide me with the correct firmware version for this DAC?
I wanted to update the firmware and downloaded wrong file (for E30ii lite) and now the unit is not working. It displays only "auto and -3" and is not reacting. There is no any on topping website
According to Topping, your E30 II should be bricked, requiring being sent back to Topping for repair:Hi
Can someone please help and provide me with the correct firmware version for this DAC?
I wanted to update the firmware and downloaded wrong file (for E30ii lite) and now the unit is not working. It displays only "auto and -3" and is not reacting. There is no any on topping website
Yes it does it displays the e30IIAccording to Topping, your E30 II should be bricked, requiring being sent back to Topping for repair:
View attachment 319591
Does the firmware update tool still recognize your E30 II?
That's ridiculous,how can that be so easy?According to Topping, your E30 II should be bricked, requiring being sent back to Topping for repair:
Have you tried contacting them at [email protected]?Yes it does it displays the e30II
In FAQ they recommend to switch to previous firmware but i cant find any
Topping's update tool does not check for firmware compatibility before writing that firmware to the device.That's ridiculous,how can that be so easy?
Isn't there a failsafe to all this?
please do not worry. Your E30 ll can be restored.Hi
Can someone please help and provide me with the correct firmware version for this DAC?
I wanted to update the firmware and downloaded wrong file (for E30ii lite) and now the unit is not working. It displays only "auto and -3" and is not reacting. There is no any on topping website
many thanks!!!please do not worry. Your E30 ll can be restored.
The original FW version is V1.13. I had it sent to me by Topping some time ago and I keep it there.
Click on the attached file E30 II_FW1.13.bin.zip to download and delete the .zip in the file name. Or download and unzip E30 II_FW1.13.zip.
You can return to the original FW by specifying E30 II_FW1.13.bin using the E30 ll Lite FW tool and performing the same operation.
ASR does not allow you to directly upload .bin files, so I upload them with .zip as the attached file name.
Topping's FW display is very misleading. I'm sure there are other people who install it by mistake.
postscript
After starting the update tool ToppingUsbAudioDfu.exe, specify E30 II_FW1.13.bin in Browse.
I'm glad I was able to help you.many thanks!!!
it helped and now it is working again
best regards