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Review and Measurements of Monoprice THX Desktop DAC & Amp

amirm

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#61
Amir,

Is it possible for you to have the - Power versus Distortion using 300 OHM load - with USB Input for Balaced Output vs Unbalanced ? (Just if you did not return the unit to AntDroid -thanks by the way!-) and of course than to Amir for the amazin job!.

I guess should be similar to the one you presented on XLR Input, but I just wnat to confirm if noise issues are more related to Input or to Output... This would be great as we could compare just the Unbalance vs Balanced outputs just with the same inputs.
I still have it. I didn't run it that way since the software won't overlay it on analog input tests I had run on other amplifiers.
 
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#62
I still have it. I didn't run it that way since the software won't overlay it on analog input tests I had run on other amplifiers.
Buf, if Í understand correctly, using USB input will be digital, so you will have the possibility to overlay them, will this work?

Regards
 

amirm

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#63
Buf, if Í understand correctly, using USB input will be digital, so you will have the possibility to overlay them, will this work?

Regards
No because the horizontal scales won't match: one will be dBFS and the other voltage. I can overlay it logically by exporting and importing the files but I am not sure they will match. Regardless, I can run the digital version if you like.
 
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#64
No because the horizontal scales won't match: one will be dBFS and the other voltage. I can overlay it logically by exporting and importing the files but I am not sure they will match. Regardless, I can run the digital version if you like.
Amir,

If it is not a very time consuming task I think it would be great to run the digital version for this input and see the difference in Noise and power side by side with same digital USB input for both, Balanced and Unbalanced.

The point is that I would expect less noise with the same USB input for Balanced vs Unbalanced. This graph will show just that.

And thanks again!
 
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#66
It's a shame the analog inputs don't bypass the dac. Being converted back and forth really screws things up. It would be nice if there were a bypass switch for those who don't want to use any of the onboard DSP options and want to use a different dac.
 

wadec22

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#67
@amirm in this review where you start by testing the DAC specifically, you said you set the headphone out to 2v. Were you measuring the device from the actual headphone output on the front or the RCA outputs on the back of the device? If by the headphone out, wouldn't that then possibly skew the results with any possible noise from the amp itself? really curious as to how this performs as a DAC and preamp for a more capable amplifier like the atom amp or THX 789.
 

wadec22

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#70
Any idea which output was used to measure the DAC performance in the first couple tests?
 

wadec22

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#72
Not anymore. :) But I suspect it was the headphone output because that was the main interest as opposed to its DAC.
thanks amir. you noted it as headphone, so I assumed so. curiosity getting me a bit. just wondering how well it does as a DAC to something like the atom amp. mostly academic given prices, etc.
 

wadec22

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#74
There are so many other DACs at lower costs so probably not a good path regardless.
agreed but I got my hands on a 2nd one at a great value. nice to have the DRC, built in EQ and such for the price i got. just debating on continuing to run my atom amp off it or just lose the atom amp as well. :)
 

graz_lag

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#75
https://www.techhive.com/article/3434003/monoprice-monolith-desktop-headphone-amp-review.html

Raising the bar
The Monolith by Monoprice desktop balanced headphone amplifier is a winner. There are lots of desktop headphone amps out there, but I can’t think of any that deliver anything close to this combination of performance and features for $500. It won’t knock off any of today’s top contenders for the crown of best headphone amp at any price, but it will have its peers running for cover.
 
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