請問這款Home Theater這個價值不值得買？

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我是個外行，請問各位高手這款Home Theater這個價值不值得買？
Kenwood-HTB204, 249美元
6-Piece Home Theater Speaker System provides a simple solution with two front speakers, two rear speakers, a center channel, and a subwoofer. Place the front speakers on either side of your television, place the rears behind you, and place the center channel just above or below the television. Then position the subwoofer in a convenient place, preferably on the same plane as your front speakers.

Dolby® Digital (AC-3) Decoder allows you to experience the thrills of today's stunning Hollywood soundtracks right in your family room. By decoding five discrete audio channels, plus a separate subwoofer channel for dynamic low bass performance, Dolby Digital delivers crisp dialogue, breathtaking movement across the soundstage, and thunderous special effects.

DTS™ Digital Decoder DTS (Digital Theater Systems) is an established digital multichannel audio format found mostly in movie theaters. DTS delivers six (5.1) channels of output sound, offering superior reproduction of DTS-encoded materials ranging from subtle details to the high-powered sound effects.

Digital Signal Format Auto Detection (Auto Select) detects the format of the incoming digital data stream, automatically activating the proper surround decoding mode. The system automatically switches between different surround modes when changing digital sources or software formats.

Digital AM/FM Stereo Tuner processes FM and AM radio broadcasts digitally, locking in on the signal for less drift and reduced distortion. It also allows for simple storage of station frequencies in convenient presets.

40 Random Memory Presets allows you to customize 40 (total) of your favorite FM and AM radio stations for easy access.

Dolby® Pro Logic Processor decodes 2-channel Dolby® Surround-encoded into 4 discrete channels (left, center, right, surround), creating a movie theater-like surround experience in the home. Available on Dolby encoded satellite, broadcast/cable TV, DVDs, laser discs, and VHS tapes.

Subwoofer Preamp Output refers to a set of output jacks (often it's a single jack) that sends only the low frequencies (usually below 200 Hz). This output is designed to connect to the line-level input(s) on a powered subwoofer, or to a separate amplifier/subwoofer combination.

Video Shielding eliminates the stray magnetic field from the speaker magnets, which could otherwise distort your TV picture.
Audio Features

Bass + Treble Controls allow you to adjust the bass (lower) and treble (higher) frequencies of the music to your own individual listening tastes.

KAM-1™ Power Amplifier Circuitry this exclusive Kenwood modular amplifier circuit doubles electrical efficiency, producing more power while generating less heat. KAM-1™ offers improved sound quality and reliability in less expensive products.
Connections

Coaxial Digital Input accepts the pure digital output from another digital product, such as a CD or DVD Player. Uses a standard coaxial digital cable (not included).

Optical (TOS-link) Digital Input accepts the pure digital output from another digital product, such as a CD or DVD Player. Uses a standard optical digital connection cable (not included).

Subwoofer Preamp Output sends the subwoofer (also know as LFE, or Low Frequency Effects, on Dolby Digital receivers) frequencies to an optional powered subwoofer, enhancing your system bass response and enriching your listening experience. Connection of this output requires an RCA cable (not included).

Optical Digital Inputs 1

Coaxial Digital Inputs 1

Subwoofer Outputs 1

RF Antenna Inputs 1

Headphone Jack Yes

Main Speaker Output Pairs 1

Analog Audio Outputs 2

Analog Audio Inputs 6
Additional Features

Full Function Remote Control provides complete control of the unit from the comfort and convenience of your chair.

Headphone Jack plug in a set of headphones for private listening, and enjoy rich full sound without disturbing others.

Sleep Timer automatically turns off the power after a preset time period for those times when you drift off to sleep during use.
Specifications

Number Of Channels 5

Station Presets 40

Total Harmonic Distortion (Stereo Mode) 0.7%

Stereo Power (Watts x 2) 80 x 2

Dolby Power Front 80 x 3

Dolby Power Surround 80 x 2

Component Dimensions 17-5/16" W x 5-11/16" H x 15-3/4" D

Front Speaker Dimensions 5-1/16" W x 7-13/16" H x 4-3/4" D

Center Speaker Dimensions 5-1/6" W x 7-13/16" H x 4-3/4" D

Rear Speaker Dimensions 5-1/16" W x 7-13/16" H x 4-3/4" D

Subwoofer Dimensions 11-13/16" W x 16-9/16" H x 16-1/8" D

Unit Weight 45.0 lbs.

Main Speakers Full Range

Surround Speakers Full Range

Center Channel Speaker Full Range

Subwoofer Separate Passive

Subwoofer Size 8"