Logitech produced a sequel to one of its best-known speaker lines on Wednesday and launched the Z906. As a successor to the veteran Z-5500, it builds on the formula of a THX-grade, 5.1-channel surround system and still puts out 500W of sustained power, 165W of which comes just from the subwoofer. The new design is shaped to stack easily in a home theater and can have as many as six devices attached, including Blu-ray players, game consoles, handhelds or computers.
