a) Galvanic isolation of data transfer and local power feeding (separate earths) of both sides.
b) Local clock, local buffer and with minute long filter to keep up with source.
as opposed to the usual usb -> i2s board usage where it's connected to a dac chip straight away more or less.
//
b) Local clock, local buffer and with minute long filter to keep up with source.
as opposed to the usual usb -> i2s board usage where it's connected to a dac chip straight away more or less.
//
I am using the DIYINHK module with very satisfactory results. I seem to have only very minor pops, if at all, when playing tracks with different sample rate.
I am powering mine with a compact regulator board from member mravlca (TPS7A4700).
I'm stepping out.
Anybody intrested in a used dam1021-05?
Some connections were tined but holes are clean. Supplied connectors were never installed.
The circuit is untouched and the board works well.
See picture, half of new value (excluding postage). PM me if intrested.
Anybody intrested in a used dam1021-05?
Some connections were tined but holes are clean. Supplied connectors were never installed.
The circuit is untouched and the board works well.
See picture, half of new value (excluding postage). PM me if intrested.
An externally hosted image should be here but it was not working when we last tested it.
Hi all,
I'm planning to build a DAC based on v2 of the DAM, with an input board, switch board and mute board by Normundss and a Anamero USB board. I'm not sure what a good way to power this all is, and I'm hoping you can help me along. Here are some questions I have:
- Is it wise to use a BiB with 12V +- to power the DAM?
- Is it wise to use a Reflektor D with 3.3V to power ISO?
- Do I need any additional Reflektors to power the DAM or Anamero?
- Any other things I need to take into account?
Thanks for your help!
Best regards,
Erik
I'm planning to build a DAC based on v2 of the DAM, with an input board, switch board and mute board by Normundss and a Anamero USB board. I'm not sure what a good way to power this all is, and I'm hoping you can help me along. Here are some questions I have:
- Is it wise to use a BiB with 12V +- to power the DAM?
- Is it wise to use a Reflektor D with 3.3V to power ISO?
- Do I need any additional Reflektors to power the DAM or Anamero?
- Any other things I need to take into account?
Thanks for your help!
Best regards,
Erik
Hi,
The V2 input board (not to be confused with V2 DAM) includes onboard regulators for 3.3V and 5V. You only need to supply 7-8V unregulated isolated DC power to it. A 10-15 VA transformer with 6V or 6.3V AC output will be perfect. Use some snubbered rectifiers (preferably soft recovery) with a couple of filter caps, that is all that is needed. It is possible to use fancier external regulators, but they are not required.
3.3V is used for the input board itself, DAM ISO power, and can be used for Amanero if it is modified not to use USB power.
By default Amanero is powered from USB bus and will supply 3.3V power for the entire input board and DAM ISO. This is the easiest setup option, but probably also the noisiest.
The 5V output is not used by the input board itself, but can be used to power the muting board, and attached microcontrollers such as Raspberry Pi or Arduino.
Two dumm questions from one who is interested in buying one soekris dac
1) Is there any test review now available? What are your true real opinion about dynamic, sound, ...
2) I read the thread and everybody is tuning and tuning. Is this a sign that it sound not as good as aspected?
Thank you for honest answers.
Kind regards
KT
1) Is there any test review now available? What are your true real opinion about dynamic, sound, ...
2) I read the thread and everybody is tuning and tuning. Is this a sign that it sound not as good as aspected?
Thank you for honest answers.
Kind regards
KT
Hallo KT,
there are no "official" test reviews... it is DIY after all and some share their listening experience. Those are the real, true opinions that are scattered across the thread.
Yes, many are in process of "improving" the DAM... again this is what DIY is all about. But get the latest revision from Soekris and build a decent power supply to go
with it and you can 🙂)) be happy for a while.
I am enjoying mine a lot.
there are no "official" test reviews... it is DIY after all and some share their listening experience. Those are the real, true opinions that are scattered across the thread.
Yes, many are in process of "improving" the DAM... again this is what DIY is all about. But get the latest revision from Soekris and build a decent power supply to go
with it and you can 🙂)) be happy for a while.
I am enjoying mine a lot.
Obtaining a ready built module is not DIY IMO. Never mind. Just like diyinhh I also wonder why many need to modify their DAM and some mods are even mandatory to make it work as it should. I wanted one as well but became quite reluctant after reading th first reviews and the need to having to mod a device straight out of the box (especially the 4 mV ripple voltage on the ladder network made me frown). Therefore I follow the thread with eagle eyes for the results of the newest revision of the DAM. It is a very nice design and if all the small issues have been solved it should be a real winner and one of the first new designs to better the TDA oldies 🙂 Just when I write this I realize the DAM is about as expensive as one TDA1541A S2 chip.
Please elaborate on the "decent power supply" Oliver. It is just connecting the right transformer isn't it ? (7 to 8V AFAIK) ?
Please elaborate on the "decent power supply" Oliver. It is just connecting the right transformer isn't it ? (7 to 8V AFAIK) ?
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Just an FYI - Soren was at RMAF last weekend, showing off two products:
1) A new, reworked (smaller) DAM.
2) A complete, portable R-2R DAC with a discrete headphone amp and USB receiver built in.
The latter supported DSD (I think via DOP, could be wrong here), and will sell for $650, available in November. This is a complete, retail product.
The new, reworked DAM is amazingly small. I didn't catch when it would be available, but the board there looked like a final article.
1) A new, reworked (smaller) DAM.
2) A complete, portable R-2R DAC with a discrete headphone amp and USB receiver built in.
The latter supported DSD (I think via DOP, could be wrong here), and will sell for $650, available in November. This is a complete, retail product.
The new, reworked DAM is amazingly small. I didn't catch when it would be available, but the board there looked like a final article.
OK, that is interesting. I thought the announcement was that the rev.2 DAM would be the same as rev.1 but with the mods done in the factory. I don't want to start confusion but is this new smaller one a rev. 3 then ?
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Hi Jean Paul,
There are two ways to power the DAC both are utilizing the same input.
7 volt transformer or
12v DC power supply the choice is yours.
Hi fi duino suggests that regulated psu is providing better sound. He also provides quite comprehensive build guide. See R2R for the rest of us at hifiduino
Sent from my ONE A2003 using Tapatalk
There are two ways to power the DAC both are utilizing the same input.
7 volt transformer or
12v DC power supply the choice is yours.
Hi fi duino suggests that regulated psu is providing better sound. He also provides quite comprehensive build guide. See R2R for the rest of us at hifiduino
Sent from my ONE A2003 using Tapatalk
The new dac sounds interesting. I'll finish my 5 version build any way. And will wait for the new version than.
Planning to run existing one with SSR4 power supply
Sent from my ONE A2003 using Tapatalk
Planning to run existing one with SSR4 power supply
Sent from my ONE A2003 using Tapatalk
Sorry - I really can't add much more to it; I only got to spend a little time at his booth, and most of my time was listening to the R-2R DAC/AMP. He did show me what he called his 'OEM' board, which looked like a miniature DAM. I was chatting with his partner (might have been his brother?) who commented that Soren really loves to make things smaller and smaller.
Some questions to Soeren than.
Would the new implementation entities have an I2S I out still?
What type of power supplies should be used with the new version.
Jean Paul from what I am hearing from Mister Rogers it looks like new product, rather than just a new revision.
Because it has been put in a new price category and it looks like was redesigned
Sent from my ONE A2003 using Tapatalk
Would the new implementation entities have an I2S I out still?
What type of power supplies should be used with the new version.
Jean Paul from what I am hearing from Mister Rogers it looks like new product, rather than just a new revision.
Because it has been put in a new price category and it looks like was redesigned
Sent from my ONE A2003 using Tapatalk
JP, the father of this DAC says that AC is fine... but as you know in DIY everybody has his/her own opinion. Some are only happy when they have employed multiple Salas regs to power everything 🙂
Joking aside, I am using a leftover DC supply for the moment and have no issues soundwise. My final built will have a DC supply based on the DIYaudio super regulator (because I had a board).
About your remark as to what is DIY... you know that people will dissect everything and try to improve it. That is DIY, and I don't object. Whether it is worth it is another story. The DAC has a lot of potential as has been found on the thread. Some will be happy with how it came (Rev2 especially), some only after extensive mods. See above.
On a side note: do you know anybody willing to spend money for my really well built Subbu DAC? 😱
You can sell it to people that want a device that simply works and requires no programming etc. It is no more than that. Different category, different price, different users, different features (none but decoding L and R signal from SPDIF) whilst measuring and sounding well. "Install-and-forget" was the motto. If you want to sell the nice encased version I once saw on pictures it could be that the price of the case makes the total price too high for the complete device. This, of course, is merely an assumption. I still receive email asking for V3 DACs...
Having a colored opinion I must say that the lack of power on plops, hiccups and no need to mod or flash filters must at least be appealing to some 🙂 Pun intended, let's wait for the first reports on the second revision of the DAM. From what I gather reading all stuff it appears the first revision was not really tested by using it in real life. Please don't tell me the rev. 2 has already been tested and reviewed...in that case I missed it.
Also a reason why I haven't bought one yet is that I switched to DDX a while ago and I really like the ease of use and the apparent simplicity that comes with it. Seeing what new affordable DDX products are launched recently things can get very interesting. It saves from buying a DAC and it saves from one conversion step which, at least on paper, has some technical advantages. To be honest I think DDX will be the future. One particularly bad aspect is that modding and/or DIYing are almost over with DDX amps except for the odd cap rolling or the RCA for BNC replacement 😀
BTW I meant that DIY for me means soldering a device yourself.
Having a colored opinion I must say that the lack of power on plops, hiccups and no need to mod or flash filters must at least be appealing to some 🙂 Pun intended, let's wait for the first reports on the second revision of the DAM. From what I gather reading all stuff it appears the first revision was not really tested by using it in real life. Please don't tell me the rev. 2 has already been tested and reviewed...in that case I missed it.
Also a reason why I haven't bought one yet is that I switched to DDX a while ago and I really like the ease of use and the apparent simplicity that comes with it. Seeing what new affordable DDX products are launched recently things can get very interesting. It saves from buying a DAC and it saves from one conversion step which, at least on paper, has some technical advantages. To be honest I think DDX will be the future. One particularly bad aspect is that modding and/or DIYing are almost over with DDX amps except for the odd cap rolling or the RCA for BNC replacement 😀
BTW I meant that DIY for me means soldering a device yourself.
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jean-paul
I understand your position.
I owned and modified a Rev1 Dam1021.
Yes, it sounds good to my ear.
However, it sounds better only after uploading new digital filters.
After modifying the power, I got my Dac burned.
Then, I ordered several Rev2 boards and measured one of them.
The THD figures look better than Rev1, even though I plugged an
ac transformer directly to Rev2. (I used Salas Shunt for my Rev1 and too got it
burned after the Vref mod.) The 2nd harmonic drops from -96dB (Rev1) to -102dB (Rev2). Nice.
Yet, no extensive listening at this moment so that I am not going to have subjective comment on the sound.
I am planning to make some PCB so that I can connect the Dam 1021 Dac with RF coaxial mini-BNCed wire.
And, trying to make a dual mono balanced version.
There are some hassle to make the Dac work better.
In this regard, it is a DIY project.
I understand your position.
I owned and modified a Rev1 Dam1021.
Yes, it sounds good to my ear.
However, it sounds better only after uploading new digital filters.
After modifying the power, I got my Dac burned.
Then, I ordered several Rev2 boards and measured one of them.
The THD figures look better than Rev1, even though I plugged an
ac transformer directly to Rev2. (I used Salas Shunt for my Rev1 and too got it
burned after the Vref mod.) The 2nd harmonic drops from -96dB (Rev1) to -102dB (Rev2). Nice.
Yet, no extensive listening at this moment so that I am not going to have subjective comment on the sound.
I am planning to make some PCB so that I can connect the Dam 1021 Dac with RF coaxial mini-BNCed wire.
And, trying to make a dual mono balanced version.
There are some hassle to make the Dac work better.
In this regard, it is a DIY project.
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Thank you for your reaction. I see my thoughts are right (I really wish it wasn't).
It seems a very nice product but having to do high risk work on a new product just is not right IMO. In your case you already lost a board which makes it an expensive exercise. It seems it does not excel measurement wise as well compared to recent DAC chips. Did you compare with older TDA chips and other R2R or even those diabolical Sigma Delta DACs, either with rev. 1 and/or rev. 2 ?
It seems a very nice product but having to do high risk work on a new product just is not right IMO. In your case you already lost a board which makes it an expensive exercise. It seems it does not excel measurement wise as well compared to recent DAC chips. Did you compare with older TDA chips and other R2R or even those diabolical Sigma Delta DACs, either with rev. 1 and/or rev. 2 ?
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