DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 120 - diyAudio
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Old 7th February 2012, 08:19 PM   #1191
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You welcome

I'm not an expert but there is a thing, sometimes overlooked, that is crucial: grounding.

For both performance and stability.

The better solution, IMHO, is to have all on the PCB, otherwise the only thing you can do is 'patching' ground like you've done.
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Old 8th February 2012, 04:08 PM   #1192
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Hi I have a little dot headphone amplifier.
If I were to use it as a preamp, would it be ok to use it direct from the A to d conversion point in the DAC instead of the current op-amp.

Last edited by j baldam; 8th February 2012 at 04:10 PM. Reason: grammer
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Old 8th February 2012, 05:32 PM   #1193
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Furthe to my question above, would this be a better option, discrete opamp on a socket.Click the image to open in full size.
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Old 9th February 2012, 03:36 PM   #1194
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I didn't want to make a new thread so I have a question for you guys
I haven't had dac's in the past so all this is new but would you recommend the dac that this thread is about or this one High end DAC TDA1543 DIR9001 kit DIY WH-1 | eBay
I am quite comfortable with soldering and stuff, as long as it WORKS after I'm done :P

Also should I buy the R-core transformer for 24 usd off ebay as well? Or should I try to spot some suitable transformer locally?
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Old 9th February 2012, 03:46 PM   #1195
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Quote:
Originally Posted by Skiivari View Post
I haven't had dac's in the past so all this is new but would you recommend the dac that this thread is about or this one High end DAC TDA1543 DIR9001 kit DIY WH-1 | eBay
Since the linked DAC has an external PS and probably coupling caps I would go for the MINI2496.

Quote:
Originally Posted by Skiivari View Post
Also should I buy the R-core transformer for 24 usd off ebay as well? Or should I try to spot some suitable transformer locally?
IMHO, absolutely yes!

Those R-Cores are very good.
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Old 9th February 2012, 04:07 PM   #1196
Radian is offline Radian  Germany
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Quote:
Originally Posted by ClaveFremen View Post
Hi Serge,

those AKM DACs don't do the entire LP filtering on chip and they depend from the external LPF to give a straight frequency response.
Any LPF Filter is just degrading the sound of the AK4396.
If there is any hiss or harshness it is not from the Chip itself.
If the AK4396 has more the 100 hours of run in, any harshness has to have
another cause. Verified by Sendler, SunRa, Terranigma and me. We all use, or have used the AK4396/4395 with no active stage and no filter.
If anyone is experiencing otherwise I strongly suggest that it has more to do
with the impedance to the amp or whatever is used after the dac by the resistors than with roll-off.

Greets,
Klaus
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Old 9th February 2012, 04:27 PM   #1197
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Quote:
Originally Posted by Radian View Post
Any LPF Filter is just degrading the sound of the AK4396.
...
Verified by Sendler, SunRa, Terranigma and me. We all use, or have used the AK4396/4395 with no active stage and no filter.
Right Klaus !

Let's burn all these useless datasheets!

Manifacturers are conspiring to steal us good sound !
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Old 9th February 2012, 06:44 PM   #1198
Radian is offline Radian  Germany
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Quote:
Originally Posted by ClaveFremen View Post
Right Klaus !

Let's burn all these useless datasheets!

Manifacturers are conspiring to steal us good sound !
Clave,
datasheets of dacs are also suggesting OpAmps but who in his right mind
uses OpAmps for serious Audio?
I didn't have any CD Player or DAC on my bench that sonded better with opamps than with Tubes or direct out.
I know of at least 5 People inkluding me, who have done extensive work with
the AK4395/96 and all of us do not use the filter that is suggested by AKM.
At the end it should be our ears that decide what we use after the dac chip.

Most who complain about harsh sound from the AKM chips have not been
waiting past the 100 hour mark to do their mods.

.
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Old 9th February 2012, 10:30 PM   #1199
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Quote:
Originally Posted by Radian View Post
Clave,
datasheets of dacs are also suggesting OpAmps but who in his right mind
uses OpAmps for serious Audio?
I didn't have any CD Player or DAC on my bench that sonded better with opamps than with Tubes or direct out.
I'm not talking of opamps Vs discretes Vs tubes Vs trasnformers etc.

There is a single point:

The goal of every DAC, and associated circuits, is to give a flat frequency response.

AK4393/5 and AK4396 have different LPF stages which, taken alone, have different frequency response.

If we agree that the final result for both is a flat frequencey response AK4393/5 and AK4396, alone, have different frequency response...

So you can use whatever technology you want to do the LPF but if you want a flat frequency response you have to make a filter with the same parameters specified in the datasheet.

Quote:
Originally Posted by Radian View Post
I know of at least 5 People inkluding me, who have done extensive work with the AK4395/96 and all of us do not use the filter that is suggested by AKM.
The datasheet for AK4396 specify a fc=125kHz, Q=0.692.

If you're using AK4396 with a different filter you don't have a flat frequency response.

Quote:
Originally Posted by Radian View Post
At the end it should be our ears that decide what we use after the dac chip.
Exactly.

I never talked about harshness but of unbalanced timbre.

I've heard it from the first listening and never changed with burn-in.

Also another forumer (Suburra) confirmed it.

We're 2 to 5. If it would have been a football match you would win...

But it's not so
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Old 9th February 2012, 11:14 PM   #1200
F1 FAN is offline F1 FAN  Canada
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Quote:
Originally Posted by ClaveFremen View Post

If you're using AK4396 with a different filter you don't have a flat frequency response.


What changes is the frequency at which the filter starts to attenuate.Therefore using the filter suggested in the 4393 datasheet with the 4396 will result in identical frequency response as if it were used with the 4393.
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