[cmacsocial]

I need your help; I'm dissatisfied: I'm using the Oppo HA-2 amp powering the FiiO X5II with Oppo PM-3 headphones. To rid background hiss, I figured trading in my FiiO E12A for the HA-2 would have fixed it (you know, using same amp brand as headphone brand...figured Oppo tested this). I was wrong Btw, all EQs are off, HA-2 Bass Boost is on, and I was listening to a FLAC file.
 
So, the question is what's causing the hissing: Is the X5II feeding a hissy signal to the HA-2? Is it the basic cable connecting X5II to HA-2?
 
Thanks in advance for your help.

 

[NA Blur]

Do you have the FiiO X5 on low gain?
 
How are you connecting the FiiO's output to the HA-2 amp?

 

[NA Blur]

Hopefully it is not outputting DC to your setup.

 

[cmacsocial]

Do you have the FiiO X5 on low gain?

How are you connecting the FiiO's output to the HA-2 amp?

I use the provided male-male cable. Line/coax out on X5ii to audio in (C) on HA-2 (with amp's toggle switch set to C).

Yes, HA-2 is on low gain.

 

[12many]

Can you try connecting the Oppo amp directly to your computer?  If so, does the hum go away? 

 

[cmacsocial]

  Can you try connecting the Oppo amp directly to your computer?  If so, does the hum go away? 

 
Hard to tell. With the HA-2 hooked up to the X5II, I hear the hum on certain FLAC tracks...but not all. Maybe it's just poor recording? Am thinking I should upgrade the cable anyway?

 

[NA Blur]

Post a link to the recordings and we can take a listen with our gear. Perhaps it is a good thing because your gear is able to discern the bad recordings from the good ones.

 

[448561]

I am hearing hiss on my Oppo HA-2 with Shure SE535. I think the Shure are just very sensitive and don't need to be amped and I am prone to hearing hiss easily. But otherwise the sound of the ha-2 is great. By mistake one day I hooked the earphones to the line out port instead of the headphone port and the hiss goes away. I am using my iPhone as a source with lossless files.