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Muse TDA1793 DAC

I got this DAC from ebay after reading reviews and my curiosity for a DAC that might be cheap and good.

It sounds good, quite good...but there is a problem and I am turing to those who might know more than I.

The highs are scratchy and "old record sounding" Its like a bad record playing in the high range only {tweeters}. Not noticeable at low volumes unless your ear is next to the tweeter. I played direct bypassing the dac and the noise is gone so it is not my speakers. Turn it up and its bad. I did not notice this when I first got it but that does not mean it was not there...just never noticed. I have only had it 2 weeks with minimal listening...maybe 30 hours run through it.

Could this be the chip? Power cord? Bad DAC? Anyone?

db
photodusty

Showing 2 responses by timlub

timlub
2,039 posts
 
This is a simple dac chip, contoller and op amp output. The only simple change would be to change the OPA2134 op amp, it in itself has a reasonalbe reputation and I have used it... If you want to do that, I would recommend an LME49720. It is a bit smoother and is found in a fair amount of high end gear and will switch out without issue. Outside of that, it could be that you have champagne taste on a beer budget.... I'm quite familiar with that myself.
Good Luck, Tim
timlub
2,039 posts
 
Good news, thanks for the update, be careful, you can spend more money rolling op amps than you paid for the dac. The most well thought of Burr Brown is a pair of OPA627, you would need an adapter and 2 op amps. Many like the LME49710/LME49720(49720 handles higher voltage) better. I'm glad it worked out for you.
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