Audio Research Ref: CD8

Ossocao,

Do you suggest it is not wise to upgrade the CD7, because sound quality suffers from it ?

Ossocao is talking about an earlier upgrade, which came preinstalled on all players sold from some point in 2007 upwards.

What I´m saying is not about last update, I did not installed the 5881 update yet.

I´m saying that mine CD7 have the last update before this one and the player sound better when it was new (before having the 6H30 problem).

I can´t say nothing about this upgrade I did not hear any CD7 with it yet. I´m hoping this will bring my original CD7 sound back. Also I think many guys here have the problem and dón´t know about it, so when the unit gets fixed they think it´s an sound upgrade, but maybe it´s only fixing the bad sound that goes out when one of the 6H30 drift from the other one.

I suggest everybody to do the mod. All cd7 will show the problem if one of the two 6h30 drift from each other. The use of only one tube avoid that. On the sonic side can´t say nothing, I did not bring mine for the last upgrade yet.

Correct me if I'm wrong, but I understand the CD7 does not upsample (like 8X, etc) and uses the Crystal 24bit sigma-delta DAC.

Does the new CD8 upsample? and is the Burr Brown 24 bit DAC a ladder type or a sigma-delta? Does anyone know what Burr Brown DAC is used (PCM1704, etc)?