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Old 7th January 2005, 02:08 PM   #1
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Cool DAC directly drives headphones & speakers ?

Is this possible ?

Maybe somebody already is working on it, over the hills and far away
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Old 7th January 2005, 02:49 PM   #2
gmarsh is offline gmarsh  Canada
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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?
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Old 7th January 2005, 05:28 PM   #3
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Its been done before use the Search engine.
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Old 7th January 2005, 06:13 PM   #4
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Quote:
Originally posted by rfbrw
Its been done before use the Search engine.
This thread ?

"totally ridiculous digital amplifier (power DAC) idea"


http://www.diyaudio.com/forums/showt...ht=#post343185
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Old 7th January 2005, 07:51 PM   #5
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I have made a DAC that directly drives headphones. See 16 x TDA1543 DAC directly drives headphones
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!

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Old 8th January 2005, 02:57 PM   #6
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Quote:
Originally posted by Intermod
I have made a DAC that directly drives headphones.
I think about a DAC that delivers something between 1W and 100W.

Multibit and without I/V conversion.
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Old 8th January 2005, 04:21 PM   #7
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Quote:
Originally posted by Bernhard


I think about a DAC that delivers something between 1W and 100W.

Multibit and without I/V conversion.
Why don't you give us a practical implementation?
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Old 8th January 2005, 04:44 PM   #8
pburke is offline pburke  Germany
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Default Re: DAC directly drives headphones & speakers ?

Quote:
Originally posted by Bernhard
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
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Old 8th January 2005, 05:01 PM   #9
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Quote:
Originally posted by rfbrw


Why don't you give us a practical implementation?
This sounds cynical.
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Old 8th January 2005, 05:25 PM   #10
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Quote:
Originally posted by Bernhard


This sounds cynical.
That sounds like an excuse
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