SM5840....DF1704..changing digital filter ? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th February 2004, 02:22 AM   #1
Lyra is offline Lyra  Norway
diyAudio Member
 
Lyra's Avatar
 
Join Date: Nov 2003
Location: Norway
Question SM5840....DF1704..changing digital filter ?

How good is the old SM5840 ?
Would it be an idea to change it for a DF1704 ?

The SM5842 should be an outstanding performer (I read...) but I can't find anything about the "quality" of SM5840.

The data sheet indicate that the "numbers" of the DF1704 is better versus SM5840....but that doesn't mean better sound ?

According to the schematics the signalflow now is: EIAJ -> SM5840 -> CF37606 -> SM5828 -> AD1862

According to the frase "simpler is better" my choice would be: EIAJ -> DF1704 -> AD1862

This would be more understandable too, as I dont have a clue what the CF37606 is.....can't find anything regarding this chip....

Regards
Lyra
  Reply With Quote
Old 10th February 2004, 02:57 AM   #2
diyAudio Member
 
Join Date: Oct 2001
Location: .
I would have thought it was irrelevant what anyone else thought of the SM5840. You either like it or you don't.
As for the CF37606, you could see if your national library holds a series of databooks in its reference section by a company called
Derivation and Tabulation Associates Inc. (D.A.T.A) They compile huge databooks on nearly every IC on the planet, broken down into classes, and the discontinued devices book may have the information you seek.
  Reply With Quote
Old 10th February 2004, 03:34 AM   #3
Lyra is offline Lyra  Norway
diyAudio Member
 
Lyra's Avatar
 
Join Date: Nov 2003
Location: Norway
Quote:
Originally posted by rfbrw
I would have thought it was irrelevant what anyone else thought of the SM5840. You either like it or you don't.
Yes...it is....but I have not heard the other one yet, and I don't know if I am missing something.....

The function of the CFxxx chips are as far I can see not neccesary anylonger, but I dont know If it oversample the signal or not.
The SM5840 can oversample 4, or 8 times, but this is controlled by the controller.
My thought was that the DF1704 could be hardwired to the correct function, no matter wat the controller try to set.... + the DF1704 is a decade newer chip.....that shouldn't be so bad....I think.
Much!!! have happened in the digital prosessing front since this SM5840 left the plant.

The player plays nize !, but if there are more to get.....I want it !
.....and, simple is often better...I like to believe that anyway

Lyra
  Reply With Quote
Old 11th February 2004, 04:15 PM   #4
diyAudio Member
 
Join Date: Oct 2001
Location: .
You could use the SM5847 or the DF1704 as both will probably be an improvement on the SM5840.
  Reply With Quote
Old 26th September 2005, 08:12 PM   #5
diyAudio Member
 
Join Date: Dec 2004
Location: Denmark
Hello Lyra.

Great thread.

I have an Onkyo cd-player with CXD2500->SM5843->SM5861
I have also thought about replacing SM5843 with DF1704 and SM5861 with PCM1798.

Have you tried your ideas from post one?

Is EIAJ format the same as Right justified format with 64FS?
(Would like how to set DF1704 to accept EIAJ from CXD2500)

All the best
Kim
  Reply With Quote
Old 26th September 2005, 09:18 PM   #6
Banned
 
Join Date: Feb 2002
Location: As far from the NOSsers as possible
Where are you going to find the AD1862s? Just curious.........

Jocko
  Reply With Quote
Old 27th September 2005, 02:51 AM   #7
Fin is offline Fin
diyAudio Member
 
Fin's Avatar
 
Join Date: Dec 2003
Location: -
Default Did someone mention SM5842??

If you need SM5842APT or SM5843AP1 - I can help.
__________________
Regards
Fin
  Reply With Quote
Old 27th September 2005, 07:22 AM   #8
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default To make it easy....

http://www.audiotuning.de/index.html?1-51-digital.html

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 30th September 2005, 11:29 PM   #9
diyAudio Member
 
Join Date: Oct 2001
Location: .
Default Re: Did someone mention SM5842??

Quote:
Originally posted by Arcamaniac
If you need SM5842APT or SM5843AP1 - I can help.
How much do you want for the '5842?
  Reply With Quote
Old 1st October 2005, 09:25 AM   #10
Fin is offline Fin
diyAudio Member
 
Fin's Avatar
 
Join Date: Dec 2003
Location: -
Default Re: Re: Did someone mention SM5842??

Quote:
Originally posted by rfbrw


How much do you want for the '5842?
Send me a private mail and we can discuss it.

Regards
__________________
Regards
Fin
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
replace digital filter SM5841AP for DF1704 alenzo Digital Source 11 3rd July 2012 12:07 PM
Sm5840 Pcm63 maartentje Digital Source 19 31st March 2006 10:15 PM
Changing filter cap in HH Scott cwerner Tubes / Valves 2 28th February 2006 12:20 PM
Changing the filter to remove harshness Ralph Multi-Way 36 15th October 2005 08:33 PM
changing existing filter Hans Multi-Way 0 6th February 2002 04:48 PM


New To Site? Need Help?

All times are GMT. The time now is 04:09 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2