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Bottom Line Logitech’s THX-certified, 2.1-channel Speaker System Z623 pumps out powerful, sweet-sounding PC audio at a nice price.

The Z623s are definitely worth your money, at least if you don’t need surround sound. They’re powerful, can be made to produce great sound with a little tweaking, and are convenient for a desktop setup. Recommended.

They have to be heard to be believed though, and despite our reservations about the THX certification, it actually seems to mean something here. These come highly recommended.

The Z623’s low price tag, combined with its good performance with movies and games, saves its bacon. If you’re looking for inexpensive speakers for listening to music, however, we think Logitech’s Z250 speakers are a far better value.

Logitech’s speaker system immediately impresses for sheer volume, as well as high- and low-frequency response, but we can’t help feeling that it doesn’t fully deliver on its promises. It’s good – but not as good as it thinks it is.