Tired of the digital deception.
Hey all! I've been researching such a project for months, and narrowed my selection down to units using the 1541 or PCM63. I found this thread and decided to jump in. I picked up a used GDA-600 yesterday, and can't wait to begin the mods! IMHO the pcm63 was the last of the good R2R dacs, and dacs period. I'm tired of playing the hyper-up-sampling game, or the latest Xingdong Wang goodly-dac v2.9 Altoid-boxed whatever... (blame the DACinthe BOX people for starting this). All of the 96/192kHz stuff is detailed but suffers from far too much digital glare. Something has happened to digital over the last 10years, it's not good, and people are beginning to wake up to this digital deception. I recently modded an old jvc xl-z1010, after yanking out the ne5532s the unit sounds unbelievably good. Every time I open a component and see 5532s on the output I just want to freaking SCREAM and rip out those horrible little insects. IMHO the ne5532 is the scourge on hi-end audio over the last 20yrs. Back to the subject at hand, has anyone considered replacing the rectifiers in the power supply while you have it torn apart? Hexfreds perhaps? Just as easy as soldering in a new cap. Also, George, I see the recommendation to remove the ferrite inductors at L 500 & L501, why not just jump back to R530 & 531 are these resisters even needed? Perhaps upgrade with some mills or Kiwame resistors? I've included a pic of my stock GDA-600. I won't be able to get to mods for about 6 or 7 weeks but will be tracking this thread with great interest!