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Here especially, impedance-matching volume controls can be used to protect the amplifier from overload. This system design is otherwise the same as a single source, single zone in that all zones must listen to the same audio source, though volume control is independent in each room (and audio can be turned off in rooms, as desired).
PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy Rectilinear Research Corporation: United States Rega Research: United Kingdom Renkus-Heinz: United States ReVox: Switzerland ...
Speakers: Most high fidelity speaker systems include tweeters capable of reproducing the highest audio frequencies, mid-range drivers for middle frequencies, and woofers for low frequencies. Headphones : Headphones let a single user listen to an audio source privately.
Such loads are around 1/1000 the impedance a line out is designed to drive, so the line out is usually not designed to source the current that would be drawn by a 4 to 8 ohm load at normal line out signal voltages. The result will be very weak sound from the speaker and possibly a damaged line out circuit.
A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an electroacoustic transducer [1]: 597 that converts an electrical audio signal into a corresponding sound. [2]
A micro audio amplifier for boosting the output of line level sources to headphones or small speakers. Edge length 4 cm, mass 16 g, power output about 100 mW into a 32 Ω load. The final stage of amplification, after preamplifiers, is the output stage, where the highest demands are placed on the transistors or tubes.