Logitech Z-313 30: number 2 for me in comparison. Halfway balanced sounding, but the bass very underrepresented and imprecise. Also, there was no adjustment for the bass and the cables are securely connected to the subwoofer and satellites. Nevertheless, in comparison, it is my personal winner near Sher and is really a great sounding set for any 40th
Logitech Z-323 40: number 4 in my comparison. It sounds like it looks beautiful ....! Cheaper plastic piano lacquer, just the middle, dull and without heights, for an indefinable mies-sounding bass. No further comment worthy!
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Logitech Z-523 65: The most expensive set in my comparison, and the maximum volume and the bass are just phenomenal. However, I had the impression that the sound as in Mitteltonbreich something missing because the satellites make a lot of bass and much treble, vocals, guitar and language but not sound wirlich great. In addition, the subwoofer is humming at idle. That had already written other reviewers and me nothing has helped. No cables anymore or use the RCA connection. In absolute terms, in comparison sound actually weaker than my test winner.
Trustwave 2.1 40: The test winner. Not only price-performance, actually also absolutely. Very balanced (of course, always in relation to the price), good contoured bass, no noise, solid connections. Just a coherent overall package. We're talking about 37 boxes, but I'm really very surprised, what's possible when you something dealing with the matter and compares! I prepare the boxes really enjoy and I'll definitely keep.
Strong buy recommendation in the "PC speakers" to 70 segment! You will not be disappointed!