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Chinese ES9018K2M I2S DAC
Chinese ES9018K2M I2S DAC
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Old 20th October 2017, 02:09 PM   #191
zek is offline zek
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A new ES9038 Q2M board, has anyone tried it?
ES9038 Q2M DAC DSD Decoder Support IIS DSD 384KHz Coaxial Fiber DOP | eBay
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Old 20th October 2017, 03:00 PM   #192
androa76 is offline androa76  Slovenia
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Interesting ... it must be some lt3045 and other output stage installed for best result.
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Old 20th October 2017, 08:02 PM   #193
bongoman is offline bongoman  United Kingdom
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Quote:
Originally Posted by zek View Post
It looks similar to the ES9028 board but with some added features. It still appears to lack any kind of regulation on the power lines.
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Old 20th October 2017, 10:34 PM   #194
zek is offline zek
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From this site:
"Power supply: regulated DC voltage double 15V or regulated DC voltage single 15V
* It is recommended to use dual 15V power supply to play board best results"

Power supply must be regulated DC +/- 15V.
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Old 21st October 2017, 03:27 AM   #195
DRONE7 is offline DRONE7  New Zealand
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Mine may arrive next week... I will compare with my Diyinhk 9018 and report. (the ES9038Q2M is the mobile/phone version so S/N and Thd are similar to 9018k2m)
Highlights are the switchable input and volume control through on-board mcu so use as a digital preamp direct to power amp is possible.
Fir filters also accessible.


From another site the detail is better....
Quote:
ES9038Q2M DAC Selectable FIR Filter Support I2S DSD 384Khz Headphone RCA Out
Support DSD64 DOP input via coaxial&optical, DSD256 via I2S input


Up for sale is an assembled DAC board of ES9038Q2M, It is the latest product from ESS with improvements from ES9028Q2M, The DAC is under soft control with optimized code, No noise when switching DSD and PCM signal, Three ways input can be connected at same time and can be switched with jumper

High Lights

MCU controllor onboard, The DAC receive I2S and DSD input
Support coaxial and optical input, Support sampling rate from 44.1Khz to 192Khz and DSD64 DOP.
There is a connector for volume control, One 10K ohm potentiometer can be series connected to adjust volume.
ES9038Q2M is successor of ES9028Q2M, The sonic is more mellow and juicy,Support DOP input via optical and coaxial which only coaxial is possible for ES9028Q2M.
Default opamp is NE5532DD, Can be subsitutated with better opamps
Improted high precision oscillators
High quality gold plated RCA terminals, Shielded heapdhone output for low noise
With signal locking indicator and DSD signal indicator.
Support 3.5mm heapdhone out and RCA stereo output.

Note: NE5532 opamp can be upgraded to MUSES8920 or MUSES02, Pls contact us if you want.

Specifications

1)Size: 77mm*83mm

Power input:

2) single DC 15V 120ma

3) Dual DC 15V (15V-0-15V), +15V 120ma, -15V 10ma

Default product is dual 15V, Can be changed with jumper,Pls operate follow the table strictly

4)support sampling rate

Optical&coaxial input: DSD64 DOP

PCM:44.1KHz,48KHz,88.2KHz,96KHz,

176.4KHz,192KHz,352.8KHz,384KHz

DSD: 2.8 MHz (DSD64) - DoP,native

5.6 MHz (DSD128) - DoP,native

11.2 MHz (DSD256) - native
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Last edited by DRONE7; 21st October 2017 at 03:53 AM.
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Old 9th November 2017, 08:00 PM   #196
yogilla62 is offline yogilla62
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......Mine may arrive next week........
Have you tested already?

Last edited by yogilla62; 9th November 2017 at 08:10 PM.
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Old 11th November 2017, 03:45 AM   #197
DRONE7 is offline DRONE7  New Zealand
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Quote:
Originally Posted by yogilla62 View Post
......Mine may arrive next week........
Have you tested already?
Listening now.

First impressions... I am quite surprised... My Diyinhk 9018k2m with 3x custom power supplies is bested by this 9038q2m using a single 15+-0-15- supply. (plenty of opportunity here for upgrading )

It does not have the 'clinical' presentation I associate with ESS chips... and seems warmer and fuller yet without sacrificing detail.
Resolution and soundstage is noticeably better than the 9018k2m .

I have wired a 50k audio taper pot and can adjust volume. Not a big range but enough to use as a 'digital controller' direct to a power amp.
Using a rotary switch to change inputs. No switching noises ! Very smooth operation.

Will try switching filters next but can't see the need really. Who changes filter on a track by track basis? .
I would rather listen to one for a week then try another and eventually settle on a preferred filter then leave it jumpered.

Inputs tested ...Usb to i2s, optical, and coax all work.

Downsides ?
... so far no direct i2s driver to be found..:-(
I am using a usb to i2s (raspberry pi player) interface and this works ok mostly... lock not achieved unless the dac is switched on while the Pi boots. If it is on first the Pi does not recognise it.

If anyone finds a dtoverlay for this I would be most interested...
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Old 11th November 2017, 04:19 AM   #198
r_jik45 is offline r_jik45  Japan
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@ DRONE7,
Difficult to follow which model people ordered/are reviewing/etc...
Even more difficult for those who are not very familiar with the DAC chips world.
Would you mind leaving a link regarding what you are speaking about?
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Old 11th November 2017, 04:33 AM   #199
DRONE7 is offline DRONE7  New Zealand
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Quote:
Originally Posted by r_jik45 View Post
@ DRONE7,
Difficult to follow which model people ordered/are reviewing/etc...
Even more difficult for those who are not very familiar with the DAC chips world.
Would you mind leaving a link regarding what you are speaking about?
ES9038 Q2M DAC DSD Decoder Support IIS DSD 384KHz Coaxial Fiber DOP | eBay

...

Last edited by DRONE7; 11th November 2017 at 04:36 AM.
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Old 11th November 2017, 07:57 AM   #200
adrian311 is offline adrian311  United Kingdom
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Hi Drone7 - looks very interesting - are you using i2s or usb or..... and what software are you using? Thanks Adrian

Oops - I see you answered most in your earlier post - but just to clarify - you are not getting noise or glitches between tracks or on changing sample rate tracks - even on high res?

Last edited by adrian311; 11th November 2017 at 08:01 AM. Reason: should have read your earlier post better.....
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