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Old 15th November 2012, 07:55 AM   #81
Coris is offline Coris  Norway
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Quote:
Originally Posted by Erlend Sæterdal View Post
I think electrolyts are fine if they are god quality. In my I/V stage there is 8 coupling electrolyts 2 for each phase. 10 Vdc on them. I prefer this solution instead a more complicated design. But I still do not like IC in a product like this.

We heard the Oppo 95 in our Hifi Club and nobody wished to buy it. I am pretty sure it is the analog stage.
You know, i did not liked ether its sound as it were out from the factory... That because I`ve started a "mod campaign" against the player I`ve just bought it.
This player (95) have some benefits, the best DAC chip at the moment, the transport, some connections possibilities, a very good video chip processor, and so on, but the analogue stage (power and after DAC processing) it were (is) not as it should be (in my opinion).
The 105 model it have even more improvements, an asynchronous DAC stage (still yet to see how it works...), better main processor, better transport, and so on, but it seems (from the first view) that the analogue stage is even worse than in precedent... Still yet to hear it, but for this one may buy it first... I think maybe I will do it at last... For the moment I`n not very decided. Anyway it may be modded this model too...
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Old 15th November 2012, 12:10 PM   #82
Coris is offline Coris  Norway
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Quote:
Originally Posted by Erlend Sæterdal View Post
................
In my I/V stage there is 8 coupling electrolyts 2 for each phase. 10 Vdc on them. I prefer this solution instead a more complicated design. But I still do not like IC in a product like this.
Do you have an discrete I/V stage? It may be more simple design when one use just opamps for a such stage.... Only two components: the op amp and its I/V resistor... Another one for final and that`s all...
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Old 15th November 2012, 12:24 PM   #83
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A closeup of the 103 audio board.

Click the image to open in full size.
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Old 15th November 2012, 01:37 PM   #84
Coris is offline Coris  Norway
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It seems to me that 103 have not AC coupling on outputs... Those caps around the opamps are for sure decoupling ones on power rails. It looks like the designers were thinking to improve the outputs of an more expensive player model, mounting those AC separation caps on output channels...

Last edited by Coris; 15th November 2012 at 01:56 PM.
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Old 15th November 2012, 02:41 PM   #85
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Ceramic caps in the supply for IC ;s ?
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Old 15th November 2012, 02:51 PM   #86
Coris is offline Coris  Norway
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Yes... maybe you right. Then it could be the other ones AC coupling... It looks like we are caps detectives...
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Old 15th November 2012, 03:31 PM   #87
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There are NO ceramics in the audio path.
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Old 15th November 2012, 06:25 PM   #88
qusp is offline qusp  Australia
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103 is a much better design....
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Old 15th November 2012, 08:41 PM   #89
Coris is offline Coris  Norway
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103 is a much better design....
Can you please develop this statement?
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Old 15th November 2012, 09:30 PM   #90
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103 is a much better design....
I also think the layout looks better but the design ? I doubt that please explain.
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