Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Mod for Oppo DV-980H: direct output from CS4361 DAC
Mod for Oppo DV-980H: direct output from CS4361 DAC
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 23rd November 2017, 12:59 AM   #1
Andersonix is online now Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Mod for Oppo DV-980H: direct output from CS4361 DAC
Default Mod for Oppo DV-980H: direct output from CS4361 DAC

I like this particular model Oppo DV-980H DVD player, as it has a pretty good picture for a DVD player, good upconverter to 1080p, HDMI output, and a USB socket on the front for playing MP3s. It also plows through most CD's, CD-R's, and DVD's almost no matter the damage. And one can pick them up pretty cheap on craigslist, so now I have four. Can't have too many spare parts right?

This mod is NOT quite housebroken as it lets loose a nasty thump every time it's switched off. My own woofers are real tough, but buyer beware.
So next time I try this mod, I will look into using the on-board muting circuit. Also my thump is made worse by the large 7.6uF caps I'm using, as Cirrus calls for 3.3uF.

Thanks to GaryB for pointing this out: The datasheet for the CS4361 shows how to connect it so that it requires no opamps. Use Fs=192000 and Rext=5000 in the equation below the diagram (attached), and C=10x10^-10 = 1000pF.

Output is lower than the stock 2V, I'm guessing about 6dB lower, so just over 1 volt? I'll measure one day.

I'm also using a switching regulator Murata 7805SR (~$10) for the 5V to the DAC.
Attached Images
File Type: jpg Screen Shot 2017-11-22 at 17.21.05.jpg (581.6 KB, 69 views)
  Reply With Quote
Old 23rd November 2017, 01:18 AM   #2
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Mod for Oppo DV-980H: direct output from CS4361 DAC
Hi Andersonix,
Why not install a relay muting circuit? Of course, I'm trying to figure out why anyone would risk exposing the DAC to the outside world. A good op amp buffer provides protection as well as better drive for dealing with the outside world. There are op amps that will operate at lower noise and distortion levels than most other pieces of equipment does. And in that light they provide a benefit to the sound quality.

-Chris
__________________
"Just because you can, doesn't mean you should" © my Wife
  Reply With Quote
Old 23rd November 2017, 04:22 PM   #3
Andersonix is online now Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Mod for Oppo DV-980H: direct output from CS4361 DAC
Because in my experience getting rid of op amps is a worthwhile aim. KISS. Maybe you don't appreciate the purity of 5V PS and DAC chip driving the whole system, but I'm pretty pleased with how it sounds, esp for the ease and tiny cost.
  Reply With Quote
Old 23rd November 2017, 04:25 PM   #4
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Mod for Oppo DV-980H: direct output from CS4361 DAC
Hi Andersonix,
Sometimes you should replace the op amps with better models. When I do that, I always get an improvement. A big one. Have you tried this approach?

-Chris
__________________
"Just because you can, doesn't mean you should" © my Wife
  Reply With Quote
Old 23rd November 2017, 04:35 PM   #5
Andersonix is online now Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Mod for Oppo DV-980H: direct output from CS4361 DAC
On my first 980, I replaced the 5532 with LM4562, and it sounded better. Bypassing the opamps altogether sounds even better.
  Reply With Quote
Old 23rd November 2017, 06:17 PM   #6
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Mod for Oppo DV-980H: direct output from CS4361 DAC
Hi Andersonix,
My guess is that you don't have any test equipment.

-Chris
__________________
"Just because you can, doesn't mean you should" © my Wife
  Reply With Quote
Old 23rd November 2017, 06:45 PM   #7
Andersonix is online now Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Mod for Oppo DV-980H: direct output from CS4361 DAC
If it doesn't sound right, I go dig some up....
  Reply With Quote
Old 23rd November 2017, 07:40 PM   #8
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Mod for Oppo DV-980H: direct output from CS4361 DAC
"Design by ear" is not the way to improve anything, you need measurements as well. Case in point. Tube preamp sounds pretty good when it comes here. Then I measure it and it has 1% THD at 1 V output. Unacceptable. This was from a designer who does design by ear. Later on, the new owner tired of the sound and is trying to sell it on. I warned him.

You can do this yourself if you wish. Just don't ask others to follow your path, and don't sell modified equipment to anyone else. That way they don't have to pay to clean up the mess.

-Chris
__________________
"Just because you can, doesn't mean you should" © my Wife
  Reply With Quote
Old 23rd November 2017, 08:01 PM   #9
Andersonix is online now Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
Mod for Oppo DV-980H: direct output from CS4361 DAC
Thank you for the anecdotal warning about someone else's irrelevant mess, but this is simply "design by datasheet" and not a path I created, so others should feel free to also play along.
  Reply With Quote
Old 2nd December 2017, 01:02 AM   #10
phase is offline phase  United States
diyAudio Member
 
Join Date: Oct 2004
If you search for other “direct out” attempts, you will notice a trend in the conclusion.
  Reply With Quote

Reply


Mod for Oppo DV-980H: direct output from CS4361 DACHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
OPPO DV-980h msj965 Digital Source 2 7th September 2017 05:09 PM
Need Help on Oppo 980h display light msj965 Digital Source 0 6th March 2013 06:10 PM
OPPO 93 and OPPO 95 - A warning. sandyK Digital Source 3 26th January 2012 06:53 AM
OPPO DV-980H Service Manual volturnofelix Digital Source 2 14th November 2009 09:21 PM
Oppo DV-981HD output impedance vizion Digital Source 4 23rd May 2008 11:23 AM


New To Site? Need Help?

All times are GMT. The time now is 08:28 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki