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DTV Television Learning Center
By February 17, 2009, broadcasters will be required to convert all of their
programming to DTV and will no longer broadcast analog signals. As a result, to
receive TV programming, some consumers will need to make changes in some of the
equipment they currently use. Click here to Learn more about DTV |
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Home Theater
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Home theater is the thrilling entertainment you get when you combine a really
outstanding picture with enveloping surround sound. If you've ever been in a
very good movie theater, with a crisp picture on the screen, and an excellent
sound system, you know how impressive that can be. Home theater has the
potential to be even more visually intense and aurally realistic, because you
don't have to share your home theater space with 200 other people.
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Complete Speaker
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Complete Speakerproduce atmospheric, ambient sounds ?such as rain drops, the rustling of leaves, or footsteps crunching on gravel. They also work with your other speakers to deliver spectacular directional effects, like a locomotive rushing by, or a bullet zinging past. They really help put you smack dab in the center of the action.
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Floor Standing Speaeker
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Floor-standing, or tower, speakers have been around for years and in many
ways remain the standard against which all other speaker types are judged. In
general, they are larger than other types of speakers, reproduce a wide range of frequencies, including deep
bass, and are usually more efficient,
giving you more volume per watt of amplifier power.
Tower speakers tend to be more expensive than bookshelf speakers, but they're
hard to beat for big, room-filling sound. If you're interested in towers but
don't want to take up too much floor space, look for one of the many slimline
models out there ?several have a footprint of less than one square foot.
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Bookshelf Speaker
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If you're working with limited space (or budget), bookshelf speakers are a
good alternative to floor-standing models. With bookshelf speakers, you get smaller speakers that you can place on stands or on shelves, and excellent performance in a smaller box (usually with a smaller price tag).
Bookshelf speakers are almost always 2-way. Some audio fans prefer them
because, when stand-mounted, they provide tight overall sound and accurate
stereo imaging. However, because of their size, they cannot produce the low bass
frequencies that floor-standing models can. As a result, many folks choose to
add a powered
subwoofer to reinforce the deep bass, especially for home theater.
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Center Channel Speaker
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The center
channel is the unsung hero of the home theater speaker system. When you
watch a movie, the center channel delivers more than 50% of the soundtrack,
including almost all of the dialogue. Since its purpose is to keep sound
anchored to the on-screen action, a good center channel speaker is crucial for a
well-balanced home theater system.
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Surround Speaker
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Surround
speakers produce atmospheric, ambient sounds ?such as rain drops, the
rustling of leaves, or footsteps crunching on gravel. They also work with your
other speakers to deliver spectacular directional effects, like a locomotive
rushing by, or a bullet zinging past. They really help put you smack dab in the
center of the action.
Although a 5.1-channel surround system, with only one pair of surround
speakers, is the most common setup, most newer home theater receivers can power
more than a single pair of surround speakers ?and there are surround formats to
match. Today, many people buy a one or two additional speakers to use as "back
surrounds" in a 6.1- or 7.1-channel system.
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Wall Speaker
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While in-wall and in-ceiling speakers have been used for decades in
commercial applications, in recent years a handful of manufacturers have
developed models which can accurately reproduce music and soundtracks at home.
In-wall and in-ceiling speakers work in the same way as regular speakers, but
they are mounted in a frame and set into the wall (or ceiling). Instead of a
separate speaker cabinet, they use the wall itself as the cabinet. (Though most
in-wall speakers are full-range, you may want to add a powered subwoofer to your
system for bass reinforcement, especially for home theater.)
With proper installation, these speakers sound great and can blend seamlessly
into your room's decor (they even have paintable grilles!). Plus, you don't fill
up your floor space with speakers. But keep in mind, installation is more
involved than setting up traditional speakers. And you will, of course, need to
run your speaker wires behind the walls.
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Subwoofer Speaker
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If you are assembling a home theater, plan on including a powered
subwoofer. Many Dolby Digital and DTS soundtracks provide a dedicated
channel of deep bass (sometimes known as low frequency effects, or LFE). This
bass is what makes the entire soundtrack feel larger, fuller, and more lifelike
?and gives special effects like thunder or explosions their window-rattling
punch.Since most speakers can't deliver that level of bass on their own, a
subwoofer is needed to ensure that your home theater system delivers crucial
low-frequency impact. A subwoofer is also a wonderful way to enrich music
listening ?it can round out all types of music, from classical to jazz to rock
to R&B.
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Receiver
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The receiver handles a whole host of tasks. It powers your speakers, tunes in
FM and AM radio stations, provides easy switching between audio/video sources,
and lets you tailor the sound of your system to suit your room and your
preferences. Home theater receivers also provide the decoding that lets you
enjoy movies, TV shows, and music in enveloping surround sound.
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