Bulky device with fine sound

I have the PSP imported with this equipment from Japan and Binn with the SoundStation eigendlich quite happy.
It has a much louder sound than the PSP but what is very advantageous in a fair environment.
Add to that the bass, which also brings the deep tones to advantage when listening to MP3's and movies.
The big problem is but if you want to play a game, because the device is still quite wide and the reach of the keys more difficult.