DAC chips by themselves, at least the ones I'm used to, doesn't have the output drive capability to drive a speaker or headphone.
As for DAC *boxes* by themselves, they might... it all depends on your definition of a DAC, and my own definition is a box which has digital input and line level out.
So lets say you put a higher power amplifier (headphone, speaker, whatever) inside a DAC box. You'll obviously then need a volume control, the ability to switch between different inputs would be nice.. and finally if you keep adding features you eventually end up with something that isn't a DAC by my definition but rather something closer to a home theatre receiver. 😀
So, what's a DAC?
As for DAC *boxes* by themselves, they might... it all depends on your definition of a DAC, and my own definition is a box which has digital input and line level out.
So lets say you put a higher power amplifier (headphone, speaker, whatever) inside a DAC box. You'll obviously then need a volume control, the ability to switch between different inputs would be nice.. and finally if you keep adding features you eventually end up with something that isn't a DAC by my definition but rather something closer to a home theatre receiver. 😀
So, what's a DAC?
rfbrw said:
This thread ?
"totally ridiculous digital amplifier (power DAC) idea"
http://www.diyaudio.com/forums/showthread.php?s=&postid=343185&highlight=#post343185
I have made a DAC that directly drives headphones. See http://www.diyaudio.com/forums/showthread.php?threadid=24992&highlight=
for details.
This project was completed over a year ago and has been in continuous use since. It's been very worthwhile as filterless direct drive makes a real improvement in the sound.
However, this design only really works with Sennheiser HD25 phones (70 ohm and very high sensitivity). I'm working on a 20 TDA1543 version with higher power supply voltages which should be compatible with a wider range of headphones - I'll report back when it is completed.
Enjoy!
for details.
This project was completed over a year ago and has been in continuous use since. It's been very worthwhile as filterless direct drive makes a real improvement in the sound.
However, this design only really works with Sennheiser HD25 phones (70 ohm and very high sensitivity). I'm working on a 20 TDA1543 version with higher power supply voltages which should be compatible with a wider range of headphones - I'll report back when it is completed.
Enjoy!
Intermod said:
I think about a DAC that delivers something between 1W and 100W.
Multibit and without I/V conversion.
Bernhard said:Is this possible ?
Maybe somebody already is working on it, over the hills and far away
I'm working on a DAC that will hopefully drive headphones directly. A 16-way paralleled DDDAC1543. I'll know in a few days what it'll do to a set of regular Sony MDR-V6s. After that I'll try some more difficult to drive headsets.
I'm driving these TDA1543s at 8.5V so there will be a lot more juice coming from them than in the other unit linked above. How much better it'll be I don't know until trying it.
Peter
Re: Re: DAC directly drives headphones & speakers ?
What do you do for volume control?
pburke said:
What do you do for volume control?
rfbrw said:
Who can ?*
Can You deliver such implementation ?
Please no excuse ! 😀
*that is what the thread is about.
But is 'that' this
A.
or this
B.
If it is A., then pburke and intermod have already done the work for you with their multi-dac designs. Personally, I'd take a leaf out of Wadia's book and let the I/V stage do the hard work.
If it is B., then I have to ask if you have actually thought about what would be required. Perhaps you have scribbled a few numbers and done a calculation or two. Perhaps you have read the odd paper or two on current driven loudspeakers. In short, do you know what you are asking for?
A.
Bernhard said:
or this
B.
Bernhard said:
If it is A., then pburke and intermod have already done the work for you with their multi-dac designs. Personally, I'd take a leaf out of Wadia's book and let the I/V stage do the hard work.
If it is B., then I have to ask if you have actually thought about what would be required. Perhaps you have scribbled a few numbers and done a calculation or two. Perhaps you have read the odd paper or two on current driven loudspeakers. In short, do you know what you are asking for?
Assuming you mean option B., then it is possible in much the same way it is possible to walk from Le Harve to Vladistok.
Frankly I am amazed that one would ask such a question. Consider what you wrote; 1W - 100W, Multibit ,No I/V. It is simply beyond me how you came to put the three together to ask the question in the first place. At this point I must stop 'cause I fear my head will explode if I try to put myself in a position where I am capable of understanding how one can ask such a question.
Frankly I am amazed that one would ask such a question. Consider what you wrote; 1W - 100W, Multibit ,No I/V. It is simply beyond me how you came to put the three together to ask the question in the first place. At this point I must stop 'cause I fear my head will explode if I try to put myself in a position where I am capable of understanding how one can ask such a question.
Thanks.
Finally we have an answer to my question and I assume that if somebody should walk from LH to V, he would be the first to do so.
rfbrw said:
Finally we have an answer to my question and I assume that if somebody should walk from LH to V, he would be the first to do so.
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