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DAC-END R (ES9018) full assembled board

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R

rredline

Member
Joined 2004
With the high sound resolution of this DAC, I have a feeling that my amp can't keep up with it. I‘m thinking of upgrading the LM7815 and LM7915 power regulators that are powering the preamp to extract more details. Do you think it is possible for Quanghao to produce some 3-terminal shunt regulators (based on the IV Stage HAK-shunt design) for us to upgrade our LM7815/7915? Thanks :)
 

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  • Shunt LM7815 LM7915.png
    Shunt LM7815 LM7915.png
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A

audiodesign

Banned
Joined 2005
rredline said:
With the high sound resolution of this DAC, I have a feeling that my amp can't keep up with it. I‘m thinking of upgrading the LM7815 and LM7915 power regulators that are powering the preamp to extract more details. Do you think it is possible for Quanghao to produce some 3-terminal shunt regulators (based on the IV Stage HAK-shunt design) for us to upgrade our LM7815/7915? Thanks :)
Click to expand...

I suggest you to eliminate the pre-amp
 
S

smoothquark

Member
Joined 2010
I am using my DAC as a pre-amp now, replacing my Arcam C31. It does sound better! However, there is a hum on my loudspeakers when there is nothing playing, and I can just about hear it when playing music. I am pretty sure I cannot hear the hum when the DAC is connected via the pre-amp. I assume this is due to the power supply? Will a mains conditioner help? How about a separate dc peer supply? Can I feed dc to the DAC and output boards? Thanks.
 
A

audiodesign

Banned
Joined 2005
smoothquark said:
I am using my DAC as a pre-amp now, replacing my Arcam C31. It does sound better! However, there is a hum on my loudspeakers when there is nothing playing, and I can just about hear it when playing music. I am pretty sure I cannot hear the hum when the DAC is connected via the pre-amp. I assume this is due to the power supply? Will a mains conditioner help? How about a separate dc peer supply? Can I feed dc to the DAC and output boards? Thanks.
Click to expand...

Are you using DAC version 1 with op-amp output stage ?
 
A

audiodesign

Banned
Joined 2005
rredline said:
With the high sound resolution of this DAC, I have a feeling that my amp can't keep up with it. I‘m thinking of upgrading the LM7815 and LM7915 power regulators that are powering the preamp to extract more details. Do you think it is possible for Quanghao to produce some 3-terminal shunt regulators (based on the IV Stage HAK-shunt design) for us to upgrade our LM7815/7915? Thanks :)
Click to expand...

We can think about
 
R

rredline

Member
Joined 2004
rredline said:
I use this PIC programmer to upgrade the firmware, cheaper than Pic-KIt.
Search in eBay or Aliexpress for "K150 PICPRO", it costs about $12.67.
.....
I have uploaded the driver, programming software and a simple tutorial here:
BAITE K150 PICPRO Programmer Drv & SW.zip
Click to expand...

The previous link is gone, I have re-uploaded these files into another cloud, for those who need it:
BAITE K150 PICPRO Programmer Drv & SW.zip

In my latest flashing attempt, I can flash it within a minute.

audiodesign said:
We can think about
Click to expand...

Thanks, no matter what.:)
 
R

rredline

Member
Joined 2004
This ES9018+Amanero combination is phenomenal, I managed to play DSD 256 and DSD 512 audio on it!

However, when I play DSD 256 audio, the LCD only shows PCM11289Hz,
and when I play DSD 512 audio, it shows PCM22579Hz.
Nothing wrong but it would be much more elegant to show it as "DSD 256" and "DSD 512".

Is it possible to update the firmware to display "DSD 256" and "DSD 512" properly? I noticed that the ESS-Amanero-base LKS DAC can display it. Thanks.

(For info, the official DSD Spec is: DSD 256 - 11.2896MHz, DSD 512 - 22.5792MHz)
 

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  • dsd 256 512 dac display.jpg
    dsd 256 512 dac display.jpg
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A

audiodesign

Banned
Joined 2005
rredline said:
This ES9018+Amanero combination is phenomenal, I managed to play DSD 256 and DSD 512 audio on it!

However, when I play DSD 256 audio, the LCD only shows PCM11289Hz,
and when I play DSD 512 audio, it shows PCM22579Hz.
Nothing wrong but it would be much more elegant to show it as "DSD 256" and "DSD 512".

Is it possible to update the firmware to display "DSD 256" and "DSD 512" properly? I noticed that the ESS-Amanero-base LKS DAC can display it. Thanks.

(For info, the official DSD Spec is: DSD 256 - 11.2896MHz, DSD 512 - 22.5792MHz)
Click to expand...

Can you upgrade the firmware ?
 

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  • ES9018_10MHz_2x16_64a_VFD.zip
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R

rredline

Member
Joined 2004
audiodesign said:
Can you upgrade the firmware ?
Click to expand...

Hi Andrea,

Loaded the firmware.
Now the LCD shows DSD 256 and DSD 512 properly!

But it has these bugs:

1) The volume is very very soft (for PCM and DSD). At 0dB, I need to turn my amp knob to 2pm (instead of of 8am) to hear some soft sound . Your last firmware (v64a @ your post #2154) also has this problem. The latest firmware that the volume works properly is v58a @ post #2019.

2) The start-up default source should not be "Optical", it should be "USB link".
 
Last edited:
A

audiodesign

Banned
Joined 2005
rredline said:
Hi Andrea,

Loaded the firmware.
Now the LCD shows DSD 256 and DSD 512 properly!

But it has these bugs:

1) The volume is very very soft (for PCM and DSD). At 0dB, I need to turn my amp knob to 2pm (instead of of 8am) to hear some soft sound . Your last firmware (v64a @ your post #2154) also has this problem. The latest firmware that the volume works properly is v58a @ post #2019.

2) The start-up default source should not be "Optical", it should be "USB link".
Click to expand...

1) I have compared now the code 58a and 64a but there is no difference in volume setting so both will work in the same mode

2) to set the default source after the switch-on enter in setting mode and press power/lcd botton to save this configuration
 
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