while surfing the web, i came across some headphone practice amps such as by cafe walter and korg.. i believe they are totally different than the headphone portable amp but i decided to try it out using my cheapo fiio e3 amp.. well, there are sound coming out and i can hear me playing.. maybe it can serve as a practice amp on the go if:

1 - can make it louder
2 - make it stereo; i only hear sound on my left headphone

is there any possible mods to fix this two?? thanks in advance..