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I debated between the same two sound pars, and I have a 3D samsung TV. A best buy guy helped me out and said there wasn't MUCH difference. I would definitely go with the cheaper one! It works absolutely wonderfuL!
Sorry, there was a problem. Please try again later.The 500 series has a better amp, which means a cleaner sound at higher volume levels. There are the same amount of HDMI inputs and outputs, but the 500 Series also has v.1.4, so it can pass-through 3-D signals, whereas the 400 Series cannot. The 500 Series also has a USB. Thanks for your interest in Samsung products. --Mr. S
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