Hi all,
I have one ES9018S and one ES9018K2M DAC board from DIYINHK since 2015 or so.. I was using the ES9018S board with non isolated XMOS USB board (also from DIYINK) until now.
Recently I bought a Marantz NA6005 network player and I did not like its analogue outputs because of the noise problem. Then I decided to connect it to my ES9018S via optical board (also from DIYINHK)...
By the way, my DAC is connected to my Peerless LCPF600 amplifier module wich is really silent amplifier. And also its very very noise free with my ES9018S DAC..
However,
When I connect my DAC to the optical receiver (I2S inputs are open) from LRCK input (as mentioned in ES9018S datasheet as LRCK is Auto SPDIF input) a low level hum noise appeared ! So the SPDIF input works correctly but with some noise..
I have tested the same with my ES9018K2M board and the result was the same.
What do you think about that?
Can you help me please?
I have one ES9018S and one ES9018K2M DAC board from DIYINHK since 2015 or so.. I was using the ES9018S board with non isolated XMOS USB board (also from DIYINK) until now.
Recently I bought a Marantz NA6005 network player and I did not like its analogue outputs because of the noise problem. Then I decided to connect it to my ES9018S via optical board (also from DIYINHK)...
By the way, my DAC is connected to my Peerless LCPF600 amplifier module wich is really silent amplifier. And also its very very noise free with my ES9018S DAC..
However,
When I connect my DAC to the optical receiver (I2S inputs are open) from LRCK input (as mentioned in ES9018S datasheet as LRCK is Auto SPDIF input) a low level hum noise appeared ! So the SPDIF input works correctly but with some noise..
I have tested the same with my ES9018K2M board and the result was the same.
What do you think about that?
Can you help me please?
Shamely I cannot add any photos to this forum 😡
I hope this time I can;
20211201_140711 by Özgür Kolay, on Flickr
This is my configuration with USB board. All boards from DIYINHK, ultra low noise psu's (with LT3045) a XMOS USB board, a ES9018 board; IV converters OPA1641 and the output buffer with LME49990..
I hope this time I can;
20211201_140711 by Özgür Kolay, on FlickrThis is my configuration with USB board. All boards from DIYINHK, ultra low noise psu's (with LT3045) a XMOS USB board, a ES9018 board; IV converters OPA1641 and the output buffer with LME49990..
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And this ist the SPDIF input board. (optical receiver is removed after test)
2021-12-01_02-24-57 by Özgür Kolay, on Flickr
Fed from DAC boards 3v3 and connected directly to LRCK input of DAC..
And this is the optical receiver; TORX147 equivalent I believe;
192K Optical SPDIF receiver - DIYINHK
2021-12-01_02-24-57 by Özgür Kolay, on FlickrFed from DAC boards 3v3 and connected directly to LRCK input of DAC..
And this is the optical receiver; TORX147 equivalent I believe;
192K Optical SPDIF receiver - DIYINHK
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Does the optical SPDIF input work okay with sources other than the Marantz? In other words, is it the Marantz that is producing the hum?
Troubleshooting! Disconnect everything from the mains electricity supply, and run all your components from batteries. If the hum has gone, reconnect your components to the mains one by one until the offending component is identified.
Either replace or consider power supply cleaner device. It sounds like electromagnetic interference. Also consider Toslink cables which doesn't suffer from EM interference.
Either replace or consider power supply cleaner device. It sounds like electromagnetic interference. Also consider Toslink cables which doesn't suffer from EM interference.
DAC with I2S input = works like charm + deadly silent !
DAC with I2S inputs open = HUM,
DAC with valid OPTICAL SPDIF (so EMI is not a problem) input, BCK, MCK, DATA pins OPEN = HUM but DAC works with SPDIF signal !
Should I pull down all other I2S pins to GND? 😕
DAC with I2S inputs open = HUM,
DAC with valid OPTICAL SPDIF (so EMI is not a problem) input, BCK, MCK, DATA pins OPEN = HUM but DAC works with SPDIF signal !
Should I pull down all other I2S pins to GND? 😕
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Hum is usually caused by a floating analog input or by some ground problem. Sometimes an open ground can do it, other times a ground loop is involved. IME a floating digital input doesn't usually cause hum, although some CMOS devices should not be left with floating inputs for other reasons.
For CMOS inputs its usually sufficient to tie them to ground or to Vcc with a 10k resistor. Having a resistor there of that value all the time does not usually affect normal circuit operation.
Thats interesting;
Pulled down I2S inputs to GND with jumpers and all noise is gone !
Thanks for your helps..
Pulled down I2S inputs to GND with jumpers and all noise is gone !
Thanks for your helps..