Surround Surround speakers need not reproduce low bass, so can be small and inconspicuous. Nevertheless, their overall sound balance should be as close as possible to the front speakers.
Proper placement is vital to establish an evenly distributed soundfield.
Some models are powered by built-in amplifiers, while others are designed to be driven by your existing amplifier, or, for better results, by a separate bass amp. Magnetic shielding Speakers placed less than two feet from the TV set must be magnetically shielded models to prevent picture distortion. Add-on speakers Center and surround models from virtually all speaker manufacturers make it easy to convert an existing stereo system to home theater. All five speakers can be in-wall units, or just the fronts or surrounds. Satellite systems Satellite speaker systems, with a separate speaker unit handling the low bass that the ear cannot localize, are particularly appropriate when space is at a premium.