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Old 3rd April 2014, 07:14 PM   #21
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--- wrong post
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Old 3rd April 2014, 10:10 PM   #22
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Thumbs up Separating digital and analog regulator for AK4113

That's good news, Sunsun22. I only must make a start with modifying my dual AK4399 DAC, and you have done so much already...
I'm glad to hear that sound detail improved, that means less jitter with separated supplies for the AK4113.
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Old 3rd April 2014, 11:41 PM   #23
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Wake up in the morning and turn on the system immediately. Worths all the work.

The modification is good but the cost of reglators is a bit high. I just bought few pieces of ADM7150 (5V and 3.3V) which is having very good specs (>90db of PSRR at 400mA and 1.6uV of noise) on the paper. I am trying to build a PCB to accomodate all external capacitors with LM and 78xx pinout to replace those expensive regulators.

Details can be seen at
Interested in ADM7151 regulator?
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Old 7th April 2014, 11:05 PM   #24
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At what level the playing device X2 AK4399,with what had to compare?
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Old 10th April 2014, 08:01 AM   #25
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Hi I like what you have done to your dac pcb.
I have just ordered this pcb from hong kong on.
I am new to DIY electronics but I am planning to use this pcb with tube output from dac chips.
I am using two 6N6p output tubes with two 6u5c power suply tubes.
For tube circuit as per lampizator site.
The only part that confuses me is the outputs from the dac chips being dual mono.
Would I take the L+ L- from one AK4399 chip & the R+ R- from the other AK4399 chip or would I use both channels from both chips in what order.
I have only tried this with the behringer SRC 2496 which uses one dac chip.
Any help you can give me please.
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Old 10th April 2014, 10:54 AM   #26
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Hi Dave. On the 2xAK4399 PCB each single dac handles either the left or right channel and outputs result on both it's stereo outputs. So you have not 2 (balanced) but 2x2 outputs per channel. For tube output probably most people use only the + or - part of the balanced outputs, but using + and - with a differential output stage is better IMO.
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Old 10th April 2014, 11:46 AM   #27
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Thank you for your fast reply NinoSimona.
That's great news tube circuit I'm using is balanced it uses both + and - of each channel.
thanks again.
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Old 10th April 2014, 02:58 PM   #28
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Default Dual AK4399 DAC

I have the obtained the circuit from the developer as follows
Attached Files
File Type: pdf 4399X2.pdf (49.9 KB, 342 views)
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Old 10th April 2014, 03:02 PM   #29
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The circuit shows +-12V for opamps but it various depending on which opamp you use. I am using +-15V for my TO-99 LME49710HA.
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Old 10th April 2014, 06:19 PM   #30
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Thank you again.
I might even try it with op amps as well.
I will put a extra set go outputs so I can try both op amp and tubes.
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