Satellites are passive, oh well... I hope the XO is half-decent. That part would be helping the noise level, of course.
Specs state the LF driver to be a "4.5-Inch High-Excursion Woofer", which appears to be incorrect... the dual 3"s mentioned elsewhere in the manual seem to be fit the images much better, which show drivers a fair bit smaller than the 5.25" sub thickness.
Given the 280 Hz crossover frequency, that would make for a terrible hole in the low midrange. Owners of the old Cambridge Soundworks PC Works 2.1 system and similar will know what I mean. A sub under the desk has to be crossed over much lower in order to avoid desk interference, say 120 Hz max or so.
Given how rare 2.1 systems allowing sub placement on the desk are, this effort is commendable. $599 seems a tad steep, but let's see. Good-quality choices for space-constrained setups aren't that plentiful.