I've had the European SIII for a week, I use BubbleUPnP for wireless mediastreaming in-house and it works flawless with my Ubuntu/minidlna mediaserver playing all files FLAC etc.. Most other music listening is via Spotify Premium @ Extreme SQ setting. Original sound is a little low in volume(possibly because of strict hearing damage regulations in France).
However, the volume problem was easily circumvented by using the app "Volume+" which is on Play and on the authors homepage. I use version 220.127.116.11 which works with ICS, not all features work but those that count ie raising the volume headroom. The setting I had to use to get enjoyable, and loud, sound from full size cans like Philips SHP8900 and Sony MDR-CD770 which i use was to set the internal Eq in Volume+ to "50" on all bands(neutral) and then raise the apps volume bar to max which is 20. This gives me loud sound without even have to use the max setting on SIII own volume control. Finally I added some low bass punch by raising 60Hz to 60 and 230Hz to 55. This makes the SIII sound like a full size amp with full size cans :) The raised volume is system wide ie works with all apps that makes sound.
Sound quality is very good, not an par but quite close to a high quality soundcard like Asus Xonar, at least for progressive rock music which is what I listen to the most. And it can sound punchy while clean. Without Volume+ the sound is just too low ...
Voodoo sound(which requires rooting of the device) may provide enhanced sound quality but the fact is, it sounds quite good only by adding one little app(Volume+). Be careful when using it though, the EQ in Volume+ is best to keep neutral(all sliders at 50) otherwise there will be severe coloration of the sound :)
Edited by xeizo - 6/6/12 at 4:01am