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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: IV conversion for 1704 DAC posted by Martin on August 8, 2001 at 02:16:14:
I'm sure many have done it before and from my experience you need to use the smallest value resistor you can to minimize the voltage on the output of the DAC (normally specified as voltage compliance but not spec'd on the PCM1704 since it is designed to work with the virtual ground provided by a high gain opamp). I originally used 100 ohms and then 50 ohms but later tests showed me that the sound improves down to at least 10 ohms so I finally went with a current mirror utilizing a couple common low noise bipolar transistors that gets down close to 3 ohms dynamic impedance without feedback (you can of course get much lower with feedback). Experiment yourself and come to your own conclusion.Dave
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Follow Ups
- Re: IV conversion for 1704 DAC - Dave I 14:47:43 08/08/01 (3)
- Re: IV conversion for 1704 DAC - iza 09:51:13 08/10/01 (2)
- Re: IV conversion for 1704 DAC - Dave I 10:55:23 08/10/01 (1)
- Re: IV conversion for 1704 DAC - iza 12:18:37 08/10/01 (0)
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