upgrading PASS D1 Dac to 24/96 - diyAudio
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Old 10th May 2007, 11:20 AM   #1
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Default upgrading PASS D1 Dac to 24/96

Hi , is it possible to upgrade the input board to get 24/96 input working
what chips must we changed for that? or is it a totally new board ?

thanks ..

Rohan
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Old 10th May 2007, 04:07 PM   #2
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and.....why not 24bit 192KHz?
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Old 10th May 2007, 07:38 PM   #3
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i forget to mention that the upgrade will be for the original D1 dac not a diy copy..
i have only some minor mods , replace the internal volume cable, input transformer, al caps with cerafine etc.. but i wonder if a solution exist to put it in a 24/96 model because the original only accept 24/48khz ...

thanks..
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Old 12th May 2007, 06:51 PM   #4
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You might try srarching the pass forum and the digital forum. I remember reading threads discussing what is actually upgraded. If memory is correct, it's just the CS8414 chip that changed. Definitely search both forums, the answer is out there.

The DiyAudio search feature is a little lame. If you're not having any luck try google's site specific feature:

"D1 upgrade" site:www.diyaudio.com

-David
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Old 14th May 2007, 01:05 PM   #5
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Thanks for your help , in my dac the digital receiver is the CS8412
i doubt i can swapp it dirrectly with a CS8414? if yes it will be great...

i search more information about this upgrade .. if someone has a pictures or schema of the 24/96 input board it can help me..

thanks...
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Old 14th May 2007, 05:14 PM   #6
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Check the datasheets, but Cirrus is recommending the cs8416 as a replacement part for the cs8412.

http://www.cirrus.com/en/products/eo...il/EOL173.html

cs8412's are available from Futurlec for $4.50usd.

http://www.futurlec.com/Others/CS8414pr.shtml

-David
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Old 14th May 2007, 06:04 PM   #7
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thanks for this precious help , i have just ordered a CS8414 because it is
compatible pin for pin with the CS8412

and i have seen there is a jumper to move on the digital board of the D1
to get the 24/96 ..

i will try this when i will receive the chips ..

Regards..

rohan.
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Old 14th May 2007, 07:05 PM   #8
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Quote:
Originally posted by dw8083
Check the datasheets, but Cirrus is recommending the cs8416 as a replacement part for the cs8412.

http://www.cirrus.com/en/products/eo...il/EOL173.html

cs8412's are available from Futurlec for $4.50usd.

http://www.futurlec.com/Others/CS8414pr.shtml

-David

Small typo - ment to say cs8414 from Futurlec and not cs8412.

Great Rohan! I'm glad to see that you are on your way to experimenting with the upgrade.

-David
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Old 17th May 2007, 07:28 PM   #9
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i think i'm was happy to soon.. i have found some posts about the D1 dac
and t it seems the Fujitsu PLL in the D1 is don't work with 24/96khz signal ..

so i'm lost again .. can i use an external master clock to feed the DIGITAL FILTER (NPC SM5842 ) and at what frequencys ?

thanks for your help..
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Old 30th May 2007, 11:35 AM   #10
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Default 24/96 upgrade

hi Folks , i have just received the CRYSTAL 8414 and swapp it on the
receiver board of the D1 , put the straps in the 96khz position and
......... it doesn't work

if someone know something i do wrong please let me know..
anyway with the new chip the dac worked in 44khz strap position..

Thanks..
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