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Old 24th January 2011, 09:15 PM   #1
TBKK is offline TBKK  Germany
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Default Modify DAC-1 CIAudio

Hi i have the DAC1 from Channel Audio (CIaudio)
does anyone has modification the make this DAC better
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Old 24th January 2011, 10:28 PM   #2
mb is offline mb
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Location: Singapore
Quote:
Originally Posted by TBKK View Post
Hi i have the DAC1 from Channel Audio (CIaudio)
does anyone has modification the make this DAC better
I have done a range of mods. Whether they make it sound better is subjective.

Power supply:
- replaced rectifier diodes with schottky diodes. Some modders like soft-recovery diodes, others prefer schottky. YMMV
- replaced most caps with Panasonic FC, and more recently FM caps
- power supply caps on digital supplies replaced with solid polymer (United Chemi Con?)
- Selective power supply bypass with stacked film caps

Replaced output opamp with LM4562.

If I recall correctly, audio output coupling caps were bypassed (ie. shorted). Please check carefully that this is ok with your system (no excessive DC on output).

Circuit mod: there is no connection for DEEM (de-emphasis signal) from the receiver to the dac chip. The dac will not apply digital de-emphasis on cds that need them. If you really need this, read the datasheets and apply the connection. This is very tricky as the leads on the chips are very small.

Good luck.
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Old 25th January 2011, 08:02 AM   #3
TBKK is offline TBKK  Germany
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I want more depth in the sound stage more low level information
also the slam in the mid. i don't use the power supply just AC 14 Volt
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