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Old 23rd June 2008, 11:40 AM   #91
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john64b, I'm running Doude Douma's DDDAC 8x TDA1543 / CS8414 with passive out, battery powered. If you have listened to this, may I know how it compares to the CS4397 / CS8416.

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Gerard
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Old 24th June 2008, 06:32 AM   #92
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Hello

My experience in the last two years:

The original DAC in a Box is dead. After 16 months or so constantly switched on (on a 12V regulated psu) it stopped working. Just some brabbling clicking noise.

So, the replacement from

http://www.diykits.com.hk/

is indeed the Super Pro series. There are two versions: one with SPDIF input and one with additional USB input.

I dont use the 20V psu delivered with them, as they get too warm, I use a good self made regulated 9V psu.

From the USB version I got one faulty unit (distortions after 10 minutes operating). Mr. Wu replaced it without problems.

He is offering some bipolar cap sets to replace the four caps on the audio output of the CS4398 and the two output caps.

A good modification.

But be warned: when you are not so experienced with soldering, these boards are quite full of small smd devices. So one must be carefully modifying it.

BTW: since some weeks I own a Zhaolu D3 DAC (slightly modified with bipolar caps) and a SndScape Cinema! card in the PC with TG-Link.

And this gives much better sound reproduction than with the USB Super Pro!

But the Super Pro is still a good base to attach own analog output stages.

Franz
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Old 16th April 2009, 01:18 AM   #93
john65b is offline john65b  United States
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Been a long time since I posted here. After trying a number of OPAMPS, I finally settled on the LT6172 on this CS4397 DAC.

I also bought a Benchmark DAC1 and this tiny CS4397 with a LT6172 still sounds better than all the DACs including the Benchmark.

I lent it to a friend for his opinion, as he has a DAC1 too.

I replaced the PS with a modified 12VDC 1A PS from a Printer....

I want to pick up another CS4398 that is currently the hot ticket here on DIYAudio
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Old 24th June 2014, 03:53 PM   #94
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Sorry to ressurect an old thread but if a chip is described as multi bit delta sigma modulator, is it still a bit stream dac?
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Old 28th June 2014, 09:01 AM   #95
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I did eventually find an answer, if anyone else is interested...

When a spec sheet specifies:
"Advanced Multi-bit Delta Sigma Architecture"

it is indeed a bitstream and not a multibit r2r ladder dac,

Quote:
In plain english: sigma-delta DACs are coarse noise-generators and when measured the way they should be measured they never make it to 16-bit resolution, don't even think about 24 bits.
As some engineers realized that the el-cheapo (bitstream) method did not lead to satisfying fidelity, because with 1-bit switching performance the quantization noise level was just too much, new converters came up, being called "multi-level sigma-delta"
source: Mother of Tone - Conversion Techniques

hope this clarifies things for someone out there
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