The amplifiers are ups relatively well to the speakers from, bass, however distorting, unfortunately, very quickly and at a lower volume. What kind of music is played back, however, plays a significant role. Bass containing music rattles violently while individual drum beats, for example, can listen passable. A compromise can be here still close because you can set ups and downs separately. For the soft music enjoyment in between the amplifier for me therefore is okay.
Looked at another way, you get a 2.1 speaker set with you "loud" and "full bass" can also listen to music course for about 40 euros. After this comparison, I have been somewhat disappointed.
Unfortunately I have not found a high end mini-amplifier I have to be satisfied with the Dynavox CS-PA1 therefore me. Price and quality are right, however, in my eyes, and I have probably just my expectations set too high, therefore four stars.