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DAC upgrade suggestion

I am currently using a Audio-gd nfb 3.1.  The information below.  I bought a Topping DX7 pro based on the good data in audio science review.com.  When I first use it, I can hear the difference immediately.  It is more dynamic, bass is more punchy, sound clearer.  It sounds great.  But after listening for a longer time, I feel a bit fatigued.  I can compensate it a bit by switching the tubes in my amp.  Then, I need to return the DX7 because the Bluetooth doesn’t work.  I plug back in the Audio-gd, and i can confirm it is not fatiguing.  It is less dynamic, but also smooth.  Now, I am confused on what I should upgrade.  Several Audio-gd DACs are reviewed by AudioScienceReview.com and the data is very bad, LoL.  I know the bad data doesn’t mean it sound bad, but should I avoid DACs with good data?  How should I pick my next DAC?  It seems R2R DACs maybe a good choice for me since many people says the sound is more analog-like.

http://www.audio-gd.com/Pro/dac/NFB-2/NFB2EN.htm
gte357s

Showing 2 responses by three_easy_payments

three_easy_payments's avatar
three_easy_payments
2,097 posts
 
I bought a Topping DX7 pro based on the good data in audio science review.com. 

Those guys base every recommendation on measurements and not listening.
three_easy_payments's avatar
three_easy_payments
2,097 posts
 
All of these posters rave about how superior the R2R DAC's are....yet I suspect none of them have heard Lampizator's  DS53 digital engine, a derivative of the digital engine used in their Pacific DAC. They’ve standardized this Delta-Sigma design throughout their line, and to my ears it's sonically superior to R2R designs.
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