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Old 29th November 2002, 09:23 AM   #21
fedde is offline fedde  Netherlands
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Jean-paul,

I agree that a TDA1541(A) with a good tube outputbuffer could sound better. But that's quite complicated to make. Plus you have to do a lot of mods on the CDP to get the supply and so better. It's really easy to make a small experimental print with around 10 components and add it to the cd-player. For starters that is cheaper, easier and will sound probably better. The TDA1541 could potentially sound better, but only with a very good output stage IMHO...

I prefer the sound of my DAC over the sound of my modded silver crown DAC equipped CD-960. Still working on it though. (OP604 opamps but still bad output caps and more suboptimal components)

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Old 29th November 2002, 09:34 AM   #22
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Hi Fedde,

Isn't it better to concentrate on a very good output stage instead of pulling a potentially better DAC chip ?
I mean isn't this using a TDA1543 for TDA1543's sake ?
A starter is better off by building it outside the player i.e. with a CS8412 receiver in a separate box. No risk of the player !

Mmm, a CD 960. My hands are itching...
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Old 29th November 2002, 09:39 AM   #23
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Hamish,

You could change polarity at the speaker but methinks it is not practical to do this everytime you want to listen to a cd.

There are other ways: like TNT Convertus or the new tubed DAC from Scott Nixon or by adding an ...opamp
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Old 29th November 2002, 09:44 AM   #24
Hamish is offline Hamish  Australia
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i sense some anamosity towards opamps in this forum...
any other methods you could suggest? i plan to use this with an X-BOSOZ and an aleph 5 (both still in VERY early stages).
thanks for your input.
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Old 29th November 2002, 09:47 AM   #25
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I gave you hints to 3 different approaches. That must be enough to get the clue...
There must be still some discovering left in building this DAC, don't you agree ? Everybody that builds this thing googles a lot and comes up whith exactly the same questions.
Finding a solution is what differentiates the DAC's from eachother.
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Old 29th November 2002, 09:49 AM   #26
fedde is offline fedde  Netherlands
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Jean-paul,
You are always welcome to visit me if your hands are so itching :-)
First I have to repair the CD-960 a little. It has sometimes trouble finding the latest tracks. It needs some adjustments I think, I have all the service manuals.

I agree that making something in a separate box has advantages. But there's not much information on the net about making good output stages for the TDA1541. The adagio DAC is rather complex and expensive due to the hard to find components.

And Elso, thanks for motivating me again to ditch the 7808. Yesterday evening I tried the 7806 again. On my previous speakers I didn't like to use the 7806 for the DAC supply. Must be that I needed some distortion to give a sense of detail and openess... or more likely the influence on the bass.

Wow, on my recently acquired Tannoys (Super Golds 12") it sounds *much* better with 6 V. Only the bass is not so good
Will the bass be better with 1K I/V instead of 1.2K? I use a 100 uF BG and a 7806 from marocco.

Later,

Fedde
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Old 29th November 2002, 09:51 AM   #27
Hamish is offline Hamish  Australia
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i'm new at this, so i might still need a bit of hand-holding. the convertus doesn't look all that great (i could be wrong), but could you couple that output stage with the nixon?
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Old 29th November 2002, 09:54 AM   #28
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Hamish,

The ultimate Geheimtipp: http://thestar.com.my/audio/articles...nschematic.gif

There are errors in this drawing concerning PS and CS8412 mode, the output section is interesting.
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Old 29th November 2002, 10:03 AM   #29
Hamish is offline Hamish  Australia
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i can't quite read the schematic properly, but it looks good (i'm on a notebook). are those tubes on the output? i really wanted to stay away from them if they are.
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Old 29th November 2002, 10:03 AM   #30
guido is offline guido  Netherlands
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Swing-arm glare..
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