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Accuphase DAC-50: Glaring sibilance

I updated the user slide-in DAC board from an Accupohase DAC-30 to the newest DAC-50. The brightness is way too harsh.
     The DAC-30 uses two Texas Instruments PCM1796 chips driven in parallel for each channel.  While the newest DAC-50 DAC uses AK4490EQ chips from Asahi Kasei Microdevices in a double parallel configuration per channel."

The only changed variable in my system is this updated, new DAC-50 placed into my Accuphase E-550.

Suggestions to minimize brightness are appreciated-
Any experiences with the DAC-50?    Will burn-in time help?     An outboard clock make sense?
Thanks, Musically, Ken

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Showing 4 responses by rubinken

rubinken's avatar
rubinken OP
102 posts
 
It seems that I have to wait patiently as it burns in for hundreds of hours. Hopefully that will warm it up to a much more pleasant sound. Hopefully...
Thanks for your respnses
rubinken's avatar
rubinken OP
102 posts
 
Thanks Chayro.  I too was surprised to hear such a bright sound form my Accuphase E-550.  I'm hoping that after hundreds of hours of burn-in I will again hear my enveloping, lovely Accuphase music.
  I will post here results after burn-in is complete.  Meantime, I patiently wait.
rubinken's avatar
rubinken OP
102 posts
 
It has certainly warmed up and is quite intoxicating now.  Lovely.
rubinken's avatar
rubinken OP
102 posts
 
Hi Mark,
I had the E550. It sounded *phenomenal*- great soundstaging, transient response & emotionally involving.  I was driving some Consensus Audio Conspiracy speakers from Austria  They utilize six ceramic drivers with total smoothness. (After decades of listening, I feel that Ceramic drivers with Class A amps sounds most compelling to me. Somewhat of a generalization, but tis what it tis.) The phono board sounded excellent to me.  I never ended up enjoying the DAC50. I replaced it with a used AMR DP777SE, which with it's tubes serves me fine.
  I gave my E550 to my son. It sounds fabulous on his Sonus Faber Guarneri Momento speakers as well. It's a terrific integrated amp.
  Hope this is helpful. Enjoy your search and listening, Ken
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