AKM 4393 vs. AKM 4396 why bother? - Page 3 - 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 5th February 2010, 02:37 AM   #21
nonsub is offline nonsub  Canada
diyAudio Member
 
Join Date: Jan 2010
Quote:
Originally Posted by AR2 View Post
I am not familiar with Jan's active output boards. This is a first time that I hear about differences in output. In my case that is OK, because I am using transformer coupled output with symmetrical jFet buffers. Quite honestly I didn't noticed any difference in that department. The only difference I found was the one described above, and that is something that is not influenced by output level, but by the character of the output signal. I do remember though, that Jan has made that conversion from 4393 to 4396 chip and I do not think that he expressed any concerns about output level with his boards. It was interesting that his and some other people's findings that made the conversion, were very similar to what I was experiencing and reporting.
In addition, manufacturer states that these two DAC chips are straight replacement for each other.
Hey AR2. Well manufacturer states that maybe but it's clearly in the docs that the output voltages are different... but I'm just a lamer trying to learn Now if I understand Jan's circuit correctly that 2.8v +, 2.8v - goes into a CS3318 and that should be fine/within spec. What I don't understand is what comes out... what my guess is is that the voltage coming out will be the same but the higher the voltage the greater the difference between attenuator "steps." I guess a lot depends on the amps and what they can handle for Vin? Thx!

Last edited by nonsub; 5th February 2010 at 02:53 AM.
  Reply With Quote
Old 5th February 2010, 04:01 AM   #22
nonsub is offline nonsub  Canada
diyAudio Member
 
Join Date: Jan 2010
And continuing that thought if the max output voltage is by a big margin too high for the amp then only a few "steps" in volume setting will go from inaudible to clipping. Maybe I should leave this to people who know what they are talking about?
  Reply With Quote
Old 5th February 2010, 05:32 AM   #23
nonsub is offline nonsub  Canada
diyAudio Member
 
Join Date: Jan 2010
And another thought. If I understand the datasheet, at unity gain, that controller has 96db of attenuation in 1/4db steps so that would seem to make it a non issue at the end of the day unless the display is calibrated to db otherwise its just a question of not using the lower 2/3rds of attenuation maybe?

Last edited by nonsub; 5th February 2010 at 05:37 AM.
  Reply With Quote
Old 5th February 2010, 11:10 AM   #24
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally Posted by nonsub View Post
Any suggestions on how to deal with the extra voltage if using JD's active output? Thx!
There's nothing to deal with. The output is 1.4V peak instead of 1.2V peak in the '93. And that's ONLY with full scale digital. No issue at all. My mod can handle about 5V peak input.
Anyway, since you will always set the volume to your liking, this slight increase (16% or 0.4db) is totally irrelevant. Just turn your level down a fraction.

jd
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W S Maugham
Check out Linear Audio!
  Reply With Quote
Old 5th February 2010, 11:12 AM   #25
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally Posted by nonsub View Post
[snip] but the higher the voltage the greater the difference between attenuator "steps."[snip]!
No, 0.5dB is a ratio, and it stays 0.5dB whatever the voltage is. It changes in absolute value, but it always is a 6% step.

jd
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W S Maugham
Check out Linear Audio!
  Reply With Quote
Old 5th February 2010, 04:20 PM   #26
nonsub is offline nonsub  Canada
diyAudio Member
 
Join Date: Jan 2010
Quote:
Originally Posted by janneman View Post
There's nothing to deal with. The output is 1.4V peak instead of 1.2V peak in the '93. And that's ONLY with full scale digital. No issue at all. My mod can handle about 5V peak input.
Anyway, since you will always set the volume to your liking, this slight increase (16% or 0.4db) is totally irrelevant. Just turn your level down a fraction.

jd
Hey Jan, per e-mail I'm not "worried" anymore but now it is a question of curiosity/learning so I'll ask more :P

How do you get a peak of 1.4V? What happens to the 5.6Vpp analog out from 4936 per datasheet?
  Reply With Quote
Old 5th February 2010, 06:11 PM   #27
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default The AK4396 sounds better and measures better

Quote:
Originally Posted by nonsub View Post
Reading through the specs these appear to be the same with the following:

a) 4396 can sample up to 192khz whereas 4393 is 96khz. In an application for example trying to mod a dcx with this chip, I believe supports only a max of 96khz anyway?

b) Potential problem is the 4396 output is 2.8v/5.6v whereas 4393 is 2.4v/4.8v

c) 4396 sports a linear 256 step digital attenutation, has anyone interfaced to this?

So the question is why bother modding and how are people claiming improved performance (other than louder due to voltage LOL)
The AK4396 sounds better and measures better. The AK4395 sounds better still.
.
AK4395 vs. AK4396 listening comparisons
.
Ultrasonic noise spectrum is better.
.
AK4395/4396 ultrasonic noise spectrum graphic
__________________
Scott
  Reply With Quote
Old 5th February 2010, 09:13 PM   #28
nonsub is offline nonsub  Canada
diyAudio Member
 
Join Date: Jan 2010
Quote:
Originally Posted by sendler View Post
The AK4396 sounds better and measures better. The AK4395 sounds better still.
AK4395 sounding better = subjective. Also not pin compat.
  Reply With Quote
Old 5th February 2010, 10:04 PM   #29
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default pin compatible

Quote:
Originally Posted by nonsub View Post
AK4395 sounding better = subjective. Also not pin compat.
I use the AK4395 pin compatible in a Behringer DEQ or DCX2496 by lifting pin 2 in order to supply 5v. The AK4396 will drop in with no mods.
.
The AK4395 sounding better is subjective. If you want to base your decision on a spec sheet rather than the experience of some one who has actually tried it just stick with the 4393.
__________________
Scott
  Reply With Quote
Old 5th February 2010, 11:14 PM   #30
nonsub is offline nonsub  Canada
diyAudio Member
 
Join Date: Jan 2010
Quote:
Originally Posted by sendler View Post
The AK4395 sounding better is subjective. If you want to base your decision on a spec sheet rather than the experience of some one who has actually tried it just stick with the 4393.
Meh everyone is saying both are better than the 4393 but there are different opinions on 4395 vs 4396 some like one some like the other, apparantly different characteristics.
  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 with this AKM dac, please federico moreno Digital Source 8 27th July 2006 08:59 PM
AKM AK5394a TobWen Digital Source 41 31st December 2003 06:18 PM
Source of AKM and NPC? maczrool Digital Source 0 6th October 2002 08:49 PM


New To Site? Need Help?

All times are GMT. The time now is 03:52 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