Filterless DAC - pros and cons?

mr_push_pull · 11th August 2004, 01:40 PM

After reading a few articles about the necessity/non-necessity of the post-DAC reconstruction filter, I see that there are two tendencies:
- remove the filter and rely on the quality of the amplifier, and
- use a tube filter

I'm posting this thread after a long debate about this issue. Since I don't have the expensive equipment to test "empirically" the two variants, I want to ask some more experienced people about this subject. Do you think that the filter can be totally removed if the amplifier has low enough IMD?

carlosfm · 11th August 2004, 02:56 PM

I suppose you are talking about the analog filter after I/V conversion?
You should have something, at least 1st or 2nd order.
I changed completely the analog filter of my Audio Alchemy DDE v3.0 dac (6th order!

) by a second order filter and the result was what I expected: amazing.

11th August 2004, 01:40 PM	#1
mr_push_pull diyAudio Member Join Date: Mar 2004 Location: At the output stage	Filterless DAC - pros and cons? After reading a few articles about the necessity/non-necessity of the post-DAC reconstruction filter, I see that there are two tendencies: - remove the filter and rely on the quality of the amplifier, and - use a tube filter I'm posting this thread after a long debate about this issue. Since I don't have the expensive equipment to test "empirically" the two variants, I want to ask some more experienced people about this subject. Do you think that the filter can be totally removed if the amplifier has low enough IMD?

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11th August 2004, 02:56 PM	#2
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	I suppose you are talking about the analog filter after I/V conversion? You should have something, at least 1st or 2nd order. I changed completely the analog filter of my Audio Alchemy DDE v3.0 dac (6th order! ) by a second order filter and the result was what I expected: amazing.