Very Interested.
Would this be available as a kit with all the SMD devices mounted?
I would like to do a bit of DIY to save some money.
Would this be available as a kit with all the SMD devices mounted?
I would like to do a bit of DIY to save some money.
I am interested in this DAC also. But I cannot see where to register for Grouo Buy 2. Where can I register for Group Buy 2?
Please write your name in the list below and choose you want to:
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
20 the end .
add or remove options, like output stage, chasise transformers, Amanero usb module
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
20 the end .
add or remove options, like output stage, chasise transformers, Amanero usb module
audiodesign (Andrea) just created the list. You're first on the list.
A GB list is progressive; every new participant should ADD to the list.
A GB list is progressive; every new participant should ADD to the list.
Hi Quang Hao and Andrea,
I'm impatient for more information about the discrete output stage!
Earlier you indicated that the power supply is still being developed, but is the main circuit tested and working?
Are you happy with the sound?
What's the current draw?
I'm impatient for more information about the discrete output stage!
Earlier you indicated that the power supply is still being developed, but is the main circuit tested and working?
Are you happy with the sound?
What's the current draw?
linuxfan, where is this list that audiodesign created? I know, he probably put my name in it, but where is it?
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
Quanghao have tested the new shunt without op-amp on a single power supply of the first DAC module and the sound is good, no differences and less problems to keep it stable.
We have tested the new output stage with a prototype on one channel and the result is much better than op-amp.
In any case I think that Quanghao will produce a first little series of few pcb, 2 or 3 items, to test if all is ok.
Please write your name in the list below and choose you want to:
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
...
20 the end .
add or remove options, like output stage, chassie, transformers and Amanero usb module
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
...
20 the end .
add or remove options, like output stage, chassie, transformers and Amanero usb module
Here the PCB layout of the new output stage (We say : DCS V/Istage ), the main specifications:
- no feedback
- very low distortion because it work as current amplifier
- Vbe nonlinearity compensated using diamond buffer on output stage
- zero dc offset using dc servo loop
- variable voltage gain only changing a single resistor (I/V)
- high output current to drive any low impedance headphone in pure class A
- high output voltage to drive any high impedance headphone
- very low output impedance to drive any cable
- both un-balanced and balanced output
- differential configuration to reduce common mode DAC errors
- no feedback
- very low distortion because it work as current amplifier
- Vbe nonlinearity compensated using diamond buffer on output stage
- zero dc offset using dc servo loop
- variable voltage gain only changing a single resistor (I/V)
- high output current to drive any low impedance headphone in pure class A
- high output voltage to drive any high impedance headphone
- very low output impedance to drive any cable
- both un-balanced and balanced output
- differential configuration to reduce common mode DAC errors
Attachments
Please write your name in the list below and choose you want to:
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
5. villanueva DAC module +output stage
...
20 the end .
add or remove options, like output stage, chassie, transformers and Amanero usb module, see relative cost on post #2
1. adeveza DAC module + output stage
2. papapew DAC module + output stage
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
5. villanueva DAC module +output stage
...
20 the end .
add or remove options, like output stage, chassie, transformers and Amanero usb module, see relative cost on post #2
Hi Quanhao and Andrea,
What would be needed to use new discrete feedback stage in the "old" version of the DAC? Can I just replace the op-amps?
Great. What would be the price for the assembled output stage to use in my DAC? Is it USD 150? When will this be ready to ship?
Thanks.
1. adeveza DAC module + output stage
2. papapew DAC module + amanero + output stage + transformer
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
5. villanueva DAC module +output stage
2. papapew DAC module + amanero + output stage + transformer
3. smokingdog DAC module + output stage
4. gde3 DAC module + amanero
5. villanueva DAC module +output stage
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