30 sold, they seriously lack in bass fishing. Pretty amazing when you see the size quite impressive for this class of equipment. I tested them by connecting electronic drums on them and other Logitech speakers that I bought there over 10 years. My old pregnant better make the sound of the bass drum. The presence of a setting "tune" does not change much, regardless of the selected position.
The Logitech Z200 is sufficient for occasional use, but if you listen to a lot of music or movies on your computer (or other device you plan to connect it) I suggest you look for another model, more efficient in low frequencies .