Fosi ZH3 Balanced Headphone Amp & DAC Review

[Whatsthephuss]

Would it make any difference running this from pure DC, ie via a battery pack? just wondering.

There could be situations where it would make a difference imo. The first room I used the ZH3 in had an odd noise, but the next room I moved it to on a different circuit did not have any of that noise. Only heard it with my most sensitive headphones, RCA input, and high gain (volume >24). The $20 Fosi DC filter actually reduced the noise, and changing the op amps also made an audible difference in the level of this noise. Most measurements of these things (power filters, cables & op amps) seem to be taken under ideal conditions but I’d be more interested to see this gear tested in “stressful” noisy environments to see if there are situations where it makes a difference. Using a battery would be a reasonable solution imo if I was only limited to the dirty power in the first room I had my setup.

 

[milanjeromos]

Anyone tried to measure the RCA input? Would be super important for my use.

 

[jjk1]

Does anyone know what frequencies in the bass and treble that the tone control are centered at?
Thanks