Spec sheet. It’s probably ballpark correct.
Not bad for not expensive R-2R - same level as many AB class amplifiers
Fiio K13 R2R SINAD -70Gustard added their own testing with AP 555 on the DR70 site page
www.gustard.com
Your have a DSP speaker. If you connect it via analog, it will use an ADC to convert it back to digital, do DSP magic and output again though it’s internal DAC. Reportedly that is a ADAU1701 which has a 80-something SINAD, and I wouldn’t worry about DR either
That is orders of magnitude worse than those DACs you compared.It is only one option for connection )) yep, I know about it. But for me it also transparent via headamp with headphones )) but with SINAD -88dB audible difference is possible only on extremely high loudness, I think it is no possible to hear distortion on normal level of loudness. So basically it is not an issue in this case - it is definitely not the worst implementation of R-2RYour have a DSP speaker. If you connect it via analog, it will use an ADC to convert it back to digital, do DSP magic and output again though it’s internal DAC. Reportedly that is a ADAU1701 which has a 80-something SINAD, and I wouldn’t worry about DR either
of course if you understand that in this price range not possible to expect SOA measurement. And price with discount on Ali was about 230$ - so I’m get what I’m pay for - it is nice looking device )) that it )) and this device can play music )))
I’m not sure that Gustard can work as transmitter - or I’m wrong ?I'm, sure it is
It has Bluetooth
Certainly no desperation as the Schiit Modius does its job quite well. Curious if any difference between R2R and Delta-Sigma DAC would be audible - nothing I could hear other than greater depth of stereo image. I have been looking for something to play with that does Airplay - as I occasionally need that convenience. Price is not terrible at all. Measurements are not state of the art, however, Gustard’s posted AP measurements are not really that bad. The SINAD looks disappointing at 88, but a closer look shows an astonishing lack of power supply noise below the 1 KHZ signal. The even and odd harmonics above 1 KHZ look to be the reason for the SINAD results. The multi-tone results look pretty good - noise does not rise significantly with frequency and stays below - 120 db. Gustard has a reputation of reliability and having it succeed at a firmware update with no issues is a positive sign.
Sounds very subjective to me. Unless you can identify this deeper soundstage in blind tests it could be you imagination.Certainly no desperation as the Schiit Modius does its job quite well. Curious if any difference between R2R and Delta-Sigma DAC would be audible - nothing I could hear other than greater depth of stereo image. I have been looking for something to play with that does Airplay - as I occasionally need that convenience. Price is not terrible at all. Measurements are not state of the art, however, Gustard’s posted AP measurements are not really that bad. The SINAD looks disappointing at 88, but a closer look shows an astonishing lack of power supply noise below the 1 KHZ signal. The even and odd harmonics above 1 KHZ look to be the reason for the SINAD results. The multi-tone results look pretty good - noise does not rise significantly with frequency and stays below - 120 db. Gustard has a reputation of reliability and having it succeed at a firmware update with no issues is a positive sign.
Jury is still out on whether to keep it. It does add some features I desire, but it doesn’t switch inputs as easily as the Modius. Part of the “fun” of the hobby is to “play” with new stuff from time to time.
There’s some difficulty setting up a proper blind test - would need to setup a second raspberry pi to feed the Modius simultaneously and switch back and forth between 2 inputs. Possibly would need to attenuate one DAC to match outputs to eliminate the volume variable in case each DAC has slightly different balanced outputs. As far as the soundstage goes, it could always be my imagination. However, it is a recording that I play a lot, so I am very familiar with how it portrays in my room. As far as filters go, it is set for the steepest setting - I have not tested the NOS setting for any sonic differences.
No, you won’t be able to hear the difference between the two Gustard models, just like you cannot hear the difference between any two competently engineered and competently performing DACs.
