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DAC-END R (ES9018) full assembled board

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#304
You should totally ditch the 2134 and use OPA1612. I have done some extensive listening tests (me and many friends) and the OPA1611 (single) actually sounds better than the OPA627 and OPA1612 (dual but same as 1611 otherwise) is much better than the OPA2134.

Some people I know totally hate Opamps but are ok with the OPA1611/12. Also the OPA1641/42 are the J-Fet versions and they are excellent as well.

You should try them

Do
 
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#308
danielkol said:
Hi, Quanghao!
As far as I understand quiet a few members are interested in a board for tube I/V.
I have 3 questions concerning this:
1. When are you going to make the board?
2. Could you incorporate CCS on the board itself?
3. Could you make an option for Russian 6S3P valve (http://www.russiantubes.com/prop.php?t=12&p=291)?
Kina regards, Daniel!
Click to expand...

Hi, Quanghao and Andrea!
It seems my massage got lost among payment notifications.
Could you answer please?
Maybe it will make sense to wait a bit and ship dac base and valve PCB together.
Kind regards, Daniel.
 
#309
I have integrated in the firmware the rolloff setting, fast to slow.

You can change the setting by remote during play.

I am still working on phase change.
 

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#316
danielkol said:
Hi, Quanghao and Andrea!
It seems my massage got lost among payment notifications.
Could you answer please?
Maybe it will make sense to wait a bit and ship dac base and valve PCB together.
Kind regards, Daniel.
Click to expand...

At this time we don't think to create a pcb for the vacuum tube output stage.

You can ask to Quanghao for a pcb of the power supply
http://www.audiodesignguide.com/DACend2/Cricuit-Suply-for-IV.jpg
used in the old DAC End 2

The vacuum output stage is very simple so you can assemble on air with the CCS by kandaudio.

For the power supply it is easy create a passive solution like my Phono End
Hi-end phono preamplifier
 
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