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OLD THREAD DAC End by Andrea Ciuffoli

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#1,702
Nikon1975 said:
Quanghao,

Can you post the size of the new dac board, I understand that now dac and ps are on the same board.

Thanks,

D.
Click to expand...

this is layout and size PCb DAC-end 2 updat
 

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#1,704
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set dac end 2 pcb)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
12. morpheous
13. hotzman (2 x full set new dac end 2 pcb)
14. le´flu (one complete set of new DAC-pcb)
15. klie (1 set)
16. Yomanze (1 set)
 
#1,705
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set dac end 2 pcb)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
12. morpheous
13. hotzman (2 x full set new dac end 2 pcb)
14. le´flu (one complete set of new DAC-pcb)
15. klie (1 set)
16. Yomanze (1 set)
17. Ferrari (1 set)
 
#1,708
PCB updat for DAC-end2

DAC board :After success with the PCB for placement DAC-end2, Tl431 used to separate the sources, and used for the inputs Salas low shunt. I removed all replaced with Tl 431 by shunt Salas.

I/V stage: I use Salas hight shunt for IV, and I use tube 9 pin: 6h30 or 6h6 or 6dj8…
The criuit:
http://www.diyaudio.com/forums/group-buys/155960-dac-end-andrea-ciuffoli-group-buys-169.html

http://www.diyaudio.com/forums/group-buys/155960-dac-end-andrea-ciuffoli-group-buys-168.html

The image :
http://www.diyaudio.com/forums/group-buys/155960-dac-end-andrea-ciuffoli-group-buys-167.html

A. Information
1. The DAC-end up dat
Material: FR4 – 1.6mm
Layers: 2
Board size: 118 x 230 mm
Surface finish: Immersion Gold
Soldermask: Both sides – RED
Silkscreen: Legend on top

2. PCBI/V stage ( Salas HV shunt + IV use tube 6h30, 6h6, 6dj8 parallel )
Material: FR4 – 1.6mm
Layers: 2
Board size: 140 x 230 mm
Surface finish: Immersion Gold
Soldermask: Both sides – RED
Silkscreen: Legend on top

B.The price: Board set
1. The DAC-end up dat : 40$
2. PCb I/V stage : 40$
Total : 80$

The price:
including shipping by mail to many countries
Shipping from Vietnam: US$ 6 (surface mail)
Payment fee (PayPal) at 3.5%: US$

My pay pal: quanghao168@yahoo.com.vn
 
#1,709
adamus said:
there is no point, each dac will sound slightly different depending on

operating point of IV
tubes
singal caps
LEd mod or not
cathode bypass cap type + size
CCS or not
filterectomy or not

so many variations and each will sound slightly different.

Warm and syrupy (what many would call 'tubey or valve sound' )? Then use the stock BOM with the filter, use bypass caps in the cathodes. Loose warm bass but lovely mids and liquid highs.

Slightly warm but clearer? use the LED cathode mod (getting rid of the cathode resistors and bypass caps) and ditch the filter. Bass tighter and better defined, mids still great (but not quite as euphonic) and the highs a little clearer (but still warm).

Accurate with even tighter bass? Then drop the B+, use a CCS as the anode load, use a the LED mod, ditch the filter.

All subjective, but thats how i heard things.

I prefer it to the cambridge audio dac magic, its more natural to my ears, but then the parts alone cost as much as the complete dacmagic, so one would expect it to perform to a similar standard.
Click to expand...

What I think.. Undoubtely I trust the creator of DE2 and all of you.. But...
I guess this Dac looks like a provocation.. Very simple digital part... I don't tell that it's not good. But I see many modern schematics.. All of creators try to reduce jitter, to resample the data, ASRC, and so on. In fact yesterday I listened to one of this DAC. The sound was very and very fabulous. But assembling of this DAC is very expensive and hard. PCB has 4 layers. Very small SMD. I think it's very difficult to assemble it at home.
What was tested:
Transport TEAC, further I2S connection to DAC, than one of very expensive Plinius amp and than Elac FS247. At the moment this is the best sound I've ever heard.

When I read this thread I try to understand. Why many people try to create very difficult and multi-component DACs with many mathematic calculations concerning the digital data if there is a simple way - to assemble DAC END 2.

I'd like to understand. If you can help me, I'll be so happy.

And very important question. The components of this DAC are not cheap. If you didn't listen to it why did you make a decision to assemble?

Undoubtly I'm interested in assembling. But I'm not sure of sound. I cannot make my final decision. Help me. What is the magic of DE2?
 
Last edited:
#1,713
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set dac end 2 pcb)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
12. morpheous
13. hotzman (2 x full set new dac end 2 pcb)
14. le´flu (one complete set of new DAC-pcb)
15. klie (1 set)
16. Yomanze (1 set)
17. Ferrari (1 set)
18. Sugden (1 set)

Hi Quanghao, may i know when is the payment due date?

Best Regard.
 
#1,717
sugden said:
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set dac end 2 pcb)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
12. morpheous
13. hotzman (2 x full set new dac end 2 pcb)
14. le´flu (one complete set of new DAC-pcb)
15. klie (1 set)
16. Yomanze (1 DAC PCB only)
17. Ferrari (1 set)
18. Sugden (1 set)

Hi Quanghao, may i know when is the payment due date?

Best Regard.
Click to expand...

Hi Quanghao, I have amended my details as I'll be building my own output stage, so just need 1x DAC PCB (the new version with integrated power supply).
 
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