2.1 at its best

In question, the C 100, the C 200 USB, the B 200 USB and the motive 2 came.
The C100 lacks the sound chip of C200USB, and there is less powerful and the highs and mids are not as clearly defined, the B200USB produced great musical sounds, but provides less bass and Creative2's already very expensive for a 2.1 system, though the sound is almost perfect.

The C 200 USB I initially operated with the onboard sound chip the Asus K8V SE Deluxe, despite this mediocre soundchips the devil over the old Logitech was able to pull clear just at the depths and at elevated volume.
Meanwhile I use the Teufel System in conjunction with the Via VT 1828s onboard one of the Asus P7P55D-E, the sound is a little better and absolutely convincing for me, very strong and neutral (would being a bit more sound warmth not hurt either).

By the way I've also tested the built-in sound chip over USB, it sounds good and considerably more detailed than the two motherboard sound solutions, is in the bass range, but at most equal. Overall a good, if not superior alternative to solid onboard sound.

An even more significant increase would probably bring a sound card, far enough for me what is offered but completely out.

A Class 2.1 system in high quality garment: tonally neutral, with very precise and powerful bass without distortion even at very high volume.