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Old 9th October 2012, 03:20 PM   #21
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In the near future will be available a module to modify the configuration of the ES9018 with infrared remote control.

The main functions:
- input selection spdif, toslink, dsd and i2s
- volume
- mute

Last edited by audiodesign; 9th October 2012 at 03:31 PM.
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Old 12th October 2012, 06:45 AM   #22
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Quote:
Originally Posted by audiodesign View Post
In the near future will be available a module to modify the configuration of the ES9018 with infrared remote control.

The main functions:
- input selection spdif, toslink, dsd and i2s
- volume
- mute
hi! audiodesign , you finis write code for volume DAC!
thanks
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update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
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Old 12th October 2012, 06:48 AM   #23
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I have complete kit DAC-END 32, I am very pleased with the sound of it!
Invite the doctor to see the pictures!
Thanks
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update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
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Old 25th October 2012, 05:49 AM   #24
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Hi Audiodesign!
You can take the test images DAC-END 32 up for all to see!
Thank you!
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update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
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Old 25th October 2012, 05:58 AM   #25
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Looking for a good I/V for this project I have started a series of test with output transformers.

There is another thread about ES9018 and transformers.
Buffalo II & transformers

The trasformers can be placed bofore or after the resistors of the I/V.

I have modified the schematic of Joe Rasmussen.
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Old 25th October 2012, 06:00 AM   #26
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In the measurements the second solution give better performances but ....

(see the name of files)
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Old 25th October 2012, 06:19 AM   #27
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The 200ohm should seen on primaries like a 200 / (4 * 4) = 12.5 ohm

but if we add also the static resitance of the primaries and secondaries

the new calculation give:

(200 + 605 + 605 / (4 * 4)) + (33 + 33) = 154 ohm (to divide for 2 prim.)

so probably the frequency response is better with the I/V resistor after the transformer becasue the ES9018 is working in voltage and not current.
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Last edited by audiodesign; 25th October 2012 at 06:34 AM.
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Old 25th October 2012, 06:22 AM   #28
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I will make some more test with LL1684 1+1:1 this evening but until now I don't consider a good idea to use the transformer on output of ES9018.

The frequency response is too bad on low frequency.
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Old 25th October 2012, 03:43 PM   #29
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I used a pair of Jensen output transformers directly connected to the ES9018 output and was quite happy with the sound. I selected the Jensen because they seemed to be built on science and theory not snake oil. Jensen also has a well written book on audio transformers on their website. I used the JT-10KB-D step down transformer to give me 0.6 V output, which was perfect for the gain of my amp. Also, I picked a slightly higher resistance than recommended on the output and loaded it with my amp input impedance in parallel to give the right value. It worked really well and I was quite happy with the low end. I had tried another configuration with an I/V stage before the transformer but found the low end frequency response to be rolled off. Maybe just try different configurations with the transformers you have to see if you can get the sound you are looking for.
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Old 25th October 2012, 05:45 PM   #30
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reactivepower, Have you measure it ?

Many DIY use transformers without measurements and they think to ear a good sound but in reality they are losing many details because there is many problems on frequency response.

Certainly I don't know if you have these problems and I don't know if you are using the ES9018 as voltage output.

The trasformes and choke have many many bad effects on frequency band and only with a set of measurements these can be found.
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