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The "301" bookshelf speakers were released in 1975. The Bose 301 Series II is a direct/reflecting speaker system. It includes “bass effects” through a 8-inch woofer and surround sound effects through its asymmetrical design. Dual frequency crossover network in the Bose 301 Series II improves sound clarity by optimizing output frequencies. [30]
The system uses Bose articulated array with 3 transducers across the front speaker to deliver a spacious stereo sound. Two custom designed passive radiators are responsible for its big bass. Audio can also be personalized. Bass, mid-range, and treble can be adjusted using the Bose app. According to Bose, this speaker is built to last.
The receiver/speaker unit generally contains an amplifier to boost the audio signal to the loudspeaker; it is powered either by batteries or by an AC electric outlet. [2] The signal frequency range used by wireless speakers is generally the same as that used by cordless telephones – 900 MHz. The RF signal can traverse walls and floors/ceilings.
The Home Speaker 500 is the flagship model in the Home Speaker Series, featuring larger drivers (speakers), and more room-filling sound. The 500 also features a color LCD display screen that is used strictly for song information (similar to the screens on early Apple iPod models).
It was a powered speaker system that offered stereo, Dolby Pro-Logic and AC3 surround sound from the soundbar and a separate subwoofer. The soundbar contained four 3-inch full range drivers and two 1-inch tweeters while the subwoofer housed one 8-inch dual voice coil driver.
A wireless speaker is a loudspeaker that receives audio through radio frequency waves rather than through electrical cables. The two most popular and widely used are variations of IEEE 802.11 or Bluetooth .