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2. High fidelity - Wikipedia

   en.wikipedia.org/wiki/High_fidelity

   Hi-fi speakers are a key component of quality audio reproduction. High fidelity (often shortened to Hi-Fi or HiFi) is the high-quality reproduction of sound. It is popular with audiophiles and home audio enthusiasts.

3. Home cinema - Wikipedia

   en.wikipedia.org/wiki/Home_cinema

   Home cinema. A dedicated home cinema room with acoustic treatment, professional wiring, equipment and speaker placing, and a digital projector and screen. Home theatre room with 100" pull down screen. A home cinema, also called a home theater or theater room, is a home entertainment audio-visual system that seeks to reproduce a movie theater ...

4. 5.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/5.1_surround_sound

   The left and right surround speakers in the bottom line create the surround sound effect. 5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. [1] It uses five full bandwidth channels and one low-frequency effects channel (the "point one"). [2]

5. Woofer - Wikipedia

   en.wikipedia.org/wiki/Woofer

   A woofer or bass speaker is a technical term for a loudspeaker driver designed to produce low frequency sounds, typically from 20 Hz up to a few hundred Hz. The name is from the onomatopoeic English word for a dog's deep bark, "woof" (in contrast to a tweeter, the name used for loudspeakers designed to reproduce high-frequency sounds, deriving from the shrill calls of birds, "tweets").

6. Low-frequency effects - Wikipedia

   en.wikipedia.org/wiki/Low-frequency_effects

   With home theater systems, a multichannel audio system was used to deliver different sounds to six or more different speakers. The widely used 5.1-channel audio system consists of five full-range main (Left, Center, Right, Left rear Surround, and Right rear Surround) plus a Low-Frequency Effects (LFE) channel.

7. Audio power - Wikipedia

   en.wikipedia.org/wiki/Audio_power

   In some cases, an audio device may be measured by the total system power of all its loudspeakers by adding all their peak power ratings. Many home theater in a box systems are rated this way. Often low-end home theater systems' power ratings are taken at a high level of harmonic distortion as well; as high as 10%, which would be noticeable.