I NEED HELP WITH SOUND!!!

Check your batteries - are they all fully charged?

Are you using a good quality cable? Cheap bargain basement cables can sometimes cause problems such as RF and EM interference.

Do you have the phantom power engaged in both units (NTG-2 phantom power ON, H4n phantom power ON)? This can cause serious problems including permanent damage to the units in addition to a potential for noise problems.


You can reduce hiss in post by using a Low-Pass Filter. Start at about 12kHz and slowly drop it. About 9kHz is as low as you can go without noticeably affecting the voices.


Oh, are you sure that your monitoring is not at fault?

I always have full charged good batteries. I do radio and so I have very good XLR cables.

How do you turn phantom on, on the mic?

Thanks

Is it definitely hiss or is it room tone ambiance?

You should always record a track of room tone to lay down under the track.

Its for sure Hiss.

The Zooms are hissy and you are compounding the problem with using a self powered mic.
The headphone amp is pretty low grade and underpowered too. You could be hearing hiss from the headphone amp is it any better listening to the files through a GOOD audio system??
Though to be honest though if it really is that noticeable I would say there is another problem somewhere. Try testing your cables and mic on another system or switch out cables and try another mic.
Only real workaround if there are no other problems would be to record line in through a mixer or good pre-amps.