Logitech Z506 is not good. It has fake Tweeter Design. The sound hurts the ears for me. The Mids is not good and Bass too is Muddy. When I upgraded to it from Creative T6060 I felt it was wrong and returned back to Creative T6060 which is Better.
Logitech Z506 is not good as it has no well balanced sound output. The Mids is not good and Bass is weak and Muddy. Its Tweeter Design is fake. Moreover it has slightly faster decoding output which is not pleasant to hear Melody Songs. For me after hearing its sound for more time I feel some inconvenience in my ears. When considering Creative Speakers T6160 has low Power output and T6200's remote's Volume control becomes loosey and unstable which is a common issue for this model and its not worth to buy it. Then T6100 has no remote control and has no metal covers. Finally Creative T6060 is better than T6100 with metal covers, compact wired remote control and one extra Tweeter in Center Speaker. Though its Bass is not deep and loosey it is the better option to get but I think it is not produced any more.