I bought the pico slim to go with my JH16 pros and everything I listen to sounds like live music, I'm not even exaggerating. The pico slim gives the JH16 pros a lot of energy, it's hard to describe but it just makes everything sound more alive, the bass sounds richer as well. The JH16 pro will sound great using just an ipod but it wasn't until I found an amp, particularly the pico slim (because I have tried other amplifiers that didn't complement the sound of the jh16 pro well) that I enjoy listening to my music more than I ever have in the past. I HIGHLY recommend the pico slim for the JH16 pros, it complements these iems very well. I'm using the pico slim with the whiplash audio Twag v2, the headamp recommended whiplash audio micro lod and an Ipod classic. The best part in the long run is that I no longer have to listen to my music at high volume levels in order to get a good balanced sound because even on the lowest setting everything sounds balanced and all the details of the recording are present. I didn't realize before that the reason I used to listen to music at high volume was to get a balanced sound from all the instruments in the recording, now I don't have to do that. There's one issue that I have with the pico slim though and it's that there's an audible pop when you power on the amp but that can be avoided by plugging the headphones in after you power on the amplifier.
Here's a photo I posted on JHaudio's Facebook: http://www.facebook.com/photo.php?fbid=3545317504947&set=p.3545317504947&type=1&theater
Edited by Oomingmak - 6/30/12 at 10:30pm