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The first 2.1 audio system from Bose to include a DVD player was the "3-2-1", released in 2001. [1] The "3-2-1 GS" model was introduced in 2003, named for its use of Bose "Gemstones" small speakers, which have two drivers pointing forward and one pointing to the side. [2] [3]
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]
Bose QuietComfort 25 with mounted 3.5 mm headphone jack, and carry case. The "QuietComfort 25" (QC25) over-ear headphones were released in 2014 [ 47 ] as the replacement for the QuietComfort 15 , and sold until 2019.
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
The production version includes an electric motor rated at 40 kW; 53 hp (54 PS) and 210 N⋅m (155 lbf⋅ft) of torque, 1.25 kWh lithium-ion battery, 18-inch 10-spoke alloy wheels in turbine blades design (optional 19-inch), hybrid badges, metallic paint finish (optional Arctic Silver body colour), three-zone automatic air conditioning, LED ...
The third-generation TL was also the first car in the American market to include a 6-disc DVD-Audio system, output through an 8-speaker 225-watt system, engineered by Panasonic and tuned by Grammy Award-winning sound engineer Elliot Scheiner. The system also plays back CDs as well as DTS audio discs, CD-Audio, CD-Rs and CD-RWs but not MP3s.