deq2496 with tda1543 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, 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 10th April 2009, 04:43 PM   #1
diyAudio Member
 
Join Date: Nov 2002
Location: HK
Default deq2496 with tda1543

I recently got a cheap tda1543 dac and found that the sound is really good. Compare to my modded deq2496 with direct tranny output, the tda1543 sound has more weight, better rhythm and dynamics, but the top end is not as refine. But I enjoy the sound of tda1543 more as it does a better job on pop and classical, the lower and mid octave is just better IMO.

I checked the pins of ak439 and the data sheet and it does seem to receive I2S signal. So I went ahead and tap the pins 5,6,7 (BICK, SDATA, LRCK) of the ak4393 and it works.

I got 1 channel working and the sound is not too bad (considering that I tap from a poor power supply).
I tried the eq and it works with the 1543 too. I believe the deq works in 24bits but 1543 just ignore the extra bits.

I will put in a better 8V for the 1543 and complete the other channel when I have more time and see how it sounds.
Attached Images
File Type: jpg deq2496_tda1543.jpg (87.5 KB, 487 views)
  Reply With Quote
Old 10th April 2009, 05:46 PM   #2
diyAudio Moderator Emeritus
 
Iain McNeill's Avatar
 
Join Date: Oct 2007
Location: Santa Cruz, California
What did you do with the audio out from the tda1543? Did you cut the trace from the old DAC and insert the tda1543 audio at that point or did you just parallel up the two DACs?

Just wondering if your tda1543 went through the same transformer output as the original DAC in your comparison.

Interesting experiment
  Reply With Quote
Old 10th April 2009, 06:21 PM   #3
diyAudio Member
 
Join Date: Nov 2002
Location: HK
The comparison is with a separate non-os tda1543 dac (uses dir9001 for receiver).

I just tap the digital signal (I2S) and use a simple I/V resistor for tda1543 output, a cap and then direct out. Very simple.
  Reply With Quote
Old 26th April 2009, 07:53 AM   #4
diyAudio Member
 
Join Date: Nov 2002
Location: HK
Here is another pic.
Sound is very good. I now using tl431 to get 7.5V instead and add a copper foil for heatsink. The tl431 give a better sonics than the standard 7808 regulator.
It seem this tda1543 will make cracking noise when over heat, so I reduce the voltage a bit and add a copper foil.

And I confirm that I like the tda1543 better than the akm4393 with tranny direct out.

Now maybe I might try the tda1541 next... with opa861 perhaps...
Or pcm56 if someone can tell me how to convert I2S to interface with pcm56...
Attached Images
File Type: jpg deq2496_tda1543_2.jpg (84.7 KB, 428 views)
  Reply With Quote
Old 4th May 2009, 05:51 PM   #5
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default Cap vs tranny

Your comparison also has another variable. The transformer that is used only with the AK4393 may be holding it back.
Get rid of the tranny and try the comparison with the same cap on each to see what the differences between dac chips really are.
__________________
Scott
  Reply With Quote
Old 5th May 2009, 04:53 AM   #6
diyAudio Member
 
Join Date: Nov 2002
Location: HK
Default Re: Cap vs tranny

Quote:
Originally posted by sendler
Your comparison also has another variable. The transformer that is used only with the AK4393 may be holding it back.
Get rid of the tranny and try the comparison with the same cap on each to see what the differences between dac chips really are.
Interesting, I found that a good transformer will always sound better than a good cap. I am already using a Tamura tranny, so I am not sure that a cap will sound better. Besides, I use the tranny for summing differential to signal end output, which is probably better than an opamp for summing. Unless you only use one of the ak4393 pin for the output, then that would be a waste of the differential output of the dac.

Since u obviously mod quite a few deq, why don't give the tda1543 a try.
Note that tda1543 in this is unlikely to be Non-oversampling as the dsp that feed is2 to the dac has probably done some filtering already.
  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
Help me fix my DEQ2496 please... MikeHunt79 Digital Line Level 14 9th January 2012 08:30 PM
Has anybody put a SRC in a DEQ2496? jscoe Digital Line Level 5 6th February 2009 02:20 AM
deq2496 vs rme 96/8 pad back Digital Line Level 0 1st September 2008 05:00 PM


New To Site? Need Help?

All times are GMT. The time now is 12:31 PM.


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