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Word Count: 1,090
Sound reproduction systems for home listening combine many different formats and technologies Compact discs CDs records and tapes are the most common formats for prerecorded sound Players for each of these formats vary in size quality and price Portable systems often combine different playback devices for maximum convenience whereas traditional home systems generally connect separate components together This gives the home listener more choice and flexibility when choosing or upgrading componentsThe electronic energy coming from a playback unit must be brought up to an adequate level before it can be heard A preamplifier takes signals from any number of different sources and brings them all to the same level A preamplifier has inputs for a cassette tape deck a CD player a radio known as a tuner a turntable a video cassette recorder VCR and other devices such as a second tape deck The user may choose which devices input signals the unit will respond to selecting which signal is delivered to the preamplifiers output The output of the preamplifier is fed to the input of a power amplifier This device takes the electronic energy from the preamplifier and increases the voltage or power of the energy so the amplifier can deliver enough power at its output to drive loudspeakersAn integrated amplifier contains both a preamplifier and an amplifier within one device An integrated amplifier that also contains an AMFM radio tuner is known as a receiver A receiver is the most common form of amplifier Separate components an amplifier a preamplifier and a tuner are usually found in more expensive audio systemsLoudspeakers generally used in home systems come in pairs and resemble boxes Within each box or enclosure there may be one or more actual speakers The enclosure itself affects the loudspeakers performance The speakers within the enclosure share the same signal The largest speaker handles the lowest frequencies and the smallest speaker handles the highest The signal from the amplifier is divided up
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