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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

128x128rubinken

Showing 1 response by saikumaar

saikumaar
2 posts
 
@rubinken thanks for creating this thread. Im looking up this comparison for my up gradation as well. Currently Im using DAC-30 onboard slot along with my E-460 Amp.
Im planning to upgrate to DAC-50 onboard slot. Can you please give me a qualitative feedback and improvements that you experienced in DAC-50 over DAC-30. Does the improvements makes a big difference in synergy and listening excitements in terms of Transparency, Soundstage, Low frequency Control and Tonality. Look forward your feedback. 
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