Before shopping for speakers, try to imagine where you're going to put them in your room. Speakers can be placed on floor stands, hung on wall brackets or placed on furniture. Subwoofers typically sound best in room corners or near the left- or right-front speakers.

The front three--left, center, and right--speakers usually sound best when positioned with their tweeters elevated to the same height as a seated listener's ears. In any case, try to keep the center speaker near the same height as the left and right speakers.

You can place speakers on shelves or on/in a low cabinet or entertainment center. Some speakers are better suited to this arrangement than others. "Acoustic suspension"-sealed satellites are the most appropriate. Next best are ported speakers--as long as the ports are located on the front of the cabinet. However, speakers with rear-mounted ports won't perform at their peak when placed inside a piece of furniture or too close to a wall.

As for the rear-channel surround speakers, they usually sound best when positioned two or more feet higher than the front speakers. However, high-fidelity DVD-Audio and Super Audio CD music will sound best when surround speakers are placed at the same height (ear level) as the front speakers.

For optimal 6.1 Dolby Digital-EX/DTS-ES and 7.1 Dolby TrueHD/DTS-HD playback, you will need additional surround back speaker. Most receivers are capable of "driving" a pair of these which are supposed to be installed behind the sweet spot to reinforce ambience effects.

If you'd rather not deal with the clutter of speaker cabinets and stringing six or more cables across your room, check out the few HTIBs that use advanced signal processing and special purpose-built speakers to reduce the speaker count to two or three. Unfortunately, sound quality and surround effects won't replicate true multichannel speaker systems.

The effectiveness of such a "virtual" solution will also depend on actual room layout. This is particularly critical for a system which "bounces" sound off walls to recreate enveloping surround effects. An opening such as an aisle or window could alter the traveling sound route, hence preventing the system from operating as intended by its designers.

The dream of wireless high-performance speakers is still unfulfilled, but a few manufacturers offer "wireless" speakers that receive signals via radio waves or infrared light--great but they still need to be plugged into the wall for AC power. Battery-powered wireless speakers just won't cut it in any sort of quality-oriented surround system.