This sound is as good as the cheapest speakers JBL sells. They are generally fine. Good high and high frequencies. I got them for free from my roommate, plus a set of Bose Cube Speakers. They compensate for the lack of performance of the 100s. Would I buy a pair of 100's if I had a need? Probably no. They are also bulky as most home theaters contain very small speakers that can be easily hidden. Overall these speakers could be better but at the price of being "free" I can't ask for much.
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