I'm not very good at describing the subtleties of different dacs at this level. I think once our systems have reached a certain point in quality, for me atleast, the changes are maybe too subtle for me to hear. Why bother you ask?! Indeed I do ask myself that sometimes.
It was Abraxalito Dorati that I had in before. Truly amazing little thing. I think if it was your only DAC you wouldn't be disappointed.
I'm sure the Miro 1862 should sound better. Better SNR and all that, so I shall listen good and hard over the next few days!
It was Abraxalito Dorati that I had in before. Truly amazing little thing. I think if it was your only DAC you wouldn't be disappointed.
I'm sure the Miro 1862 should sound better. Better SNR and all that, so I shall listen good and hard over the next few days!
You mean one board? Technically yes, as long as you cool down regulators properly. Would it be wise, no 🙂
Yes one PSU2 with several AD1862 boards, I would like to try multichannel with digital crossovers.
I did a search I and think at least the draw/temp should be ok. Vunce measured draw @ around 22/30mA on 12V w/ OPA1611 and 22/3.3 mA on 5V. According to the PSU2 BOM with 577102B04000G heatsinks temp should be ok up to 400 and 200 mA respectively.
Do you see powering three boards with a single psu as a problem? I've seen a few quite serious balanced DACs (two dac boards) being powered from a single PSU.
Jlsounds xmos chip supply heats quite a lot with 400mA load, and heatsink is 5°C/W. Finger on heatsink in summer, burns. Ans that is in an opened space, within enclosure it will be solidly higher. That should tell you how that little heatsink will behave, but you can calculate in general.
I can't tell you how it will sound, never done it. I prefer to single out my supplies for it's loads.
I can't tell you how it will sound, never done it. I prefer to single out my supplies for it's loads.
Just found that reclock is done by Xilinx inside of Jlsound card. Then probably external clock can improve quality.
I’ve been experimenting with making a more “finished” 1862 after my 1541 dac was no where near fitting inside of this case. -_-
While doing so I decided to roll some opamps as I haven’t tried some newer purchases with the 1862.
The 1655 is stunning to me, and for the price it’s unreal. I highly recommend it for anyone who has yet to try this combo.
To note, when I tried the 1655 with a 1541 I was unimpressed, but it seems to be a great fit for the 1862.
Using Ad1862 with Burson v6 classic. LJlsound usb stacked. Anyone experienced at beginning maybe 1h after switching on harsh and distorted sound. Problem is not Burson because is all time powered. Could be problem only with Jlsound. Jlsound is usb powered. I think oscillator need some time to reach operational temperature.
It is better for the JLS board to have its own independent power supply. That power supply from the PC is dirty, connects the DAC GND to the PC GND, and maybe there is not enough current for the card to work properly on the USB port. It does it somehow, but it's not the best it can be. When you have already invested all that in the DAC, invest a little more for the JLS power supply. Xmos part independently, galvanically separated from the rest.
Yes I know that jlsound is working better with independent psu. I'm preparing for order components for dual psu one for analog and another for digital part of jlsound. Strange is that after 2h sound is much better. Jlsound require total 500mA and probably is too much for pc.
Hello everyone
I'm just starting to solder the PCM58 DAC board
My plan is this: signal from I2S over USB FIO, initially powered from USB just to check if everything works.
The next step is to power the I2Sover USB from two independent power supplies (I have two Chinese ones, LT3042 and a 2x8V transformer) I know - I need to cut the jumper
Signals from I2S over USB:
BCK
LRCK
DL
DR
DATA not connected
What about the GND connection between I2S over USB and the DAC board?
DAC board
I will not solder the sift register
Do I have to cut the JP1 and JP2 jumpers?
Output stage To start with, for testing: in-board op-amp
Next step: external I/V stage I have very nice boards for tube stage ( SRPP 6N2P ) and discrete ( transistors) stage based on Eric Juaneda ( both gift form my friend from Poland)
Question:
Where is the best place to get the signal for external I/V? From the OP-AMP socket?
Do I need to desolder the conversion resistor (R8, R9) for external I/V or is it enough to remove the OP-AMP from the socket?
Are the values of decoupling capacitors for PCM58 - 47nF are critical or can I use, for example, 100nF?
What else should you pay attention to?
I apologize in advance for the beginner's questions, but I have no experience with digital technology yet
I'm just starting to solder the PCM58 DAC board
My plan is this: signal from I2S over USB FIO, initially powered from USB just to check if everything works.
The next step is to power the I2Sover USB from two independent power supplies (I have two Chinese ones, LT3042 and a 2x8V transformer) I know - I need to cut the jumper
Signals from I2S over USB:
BCK
LRCK
DL
DR
DATA not connected
What about the GND connection between I2S over USB and the DAC board?
DAC board
I will not solder the sift register
Do I have to cut the JP1 and JP2 jumpers?
Output stage To start with, for testing: in-board op-amp
Next step: external I/V stage I have very nice boards for tube stage ( SRPP 6N2P ) and discrete ( transistors) stage based on Eric Juaneda ( both gift form my friend from Poland)
Question:
Where is the best place to get the signal for external I/V? From the OP-AMP socket?
Do I need to desolder the conversion resistor (R8, R9) for external I/V or is it enough to remove the OP-AMP from the socket?
Are the values of decoupling capacitors for PCM58 - 47nF are critical or can I use, for example, 100nF?
What else should you pay attention to?
I apologize in advance for the beginner's questions, but I have no experience with digital technology yet
"What about the GND connection between I2S over USB and the DAC board?"
Yes. You are going to have all sorts of problems if you do not connect the ground of i2soverusb to the ground of the dac board.
"Do I have to cut the JP1 and JP2 jumpers?"
Yes. You should cut the traces.
"Where is the best place to get the signal for external I/V? From the OP-AMP socket?"
I would solder to the op amp socket pin.
"Do I need to desolder the conversion resistor (R8, R9) for external I/V or is it enough to remove the OP-AMP from the socket?"
With no op amp or any other devices that takes after the pinout format of single op amp, R8 and R9 should be 'floating'. Yet, i would want to remove them in case of absent-mindedly installing something in the future that may put them into the signal path and wondering why the dac does not work properly.
Yes. You are going to have all sorts of problems if you do not connect the ground of i2soverusb to the ground of the dac board.
"Do I have to cut the JP1 and JP2 jumpers?"
Yes. You should cut the traces.
"Where is the best place to get the signal for external I/V? From the OP-AMP socket?"
I would solder to the op amp socket pin.
"Do I need to desolder the conversion resistor (R8, R9) for external I/V or is it enough to remove the OP-AMP from the socket?"
With no op amp or any other devices that takes after the pinout format of single op amp, R8 and R9 should be 'floating'. Yet, i would want to remove them in case of absent-mindedly installing something in the future that may put them into the signal path and wondering why the dac does not work properly.
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