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Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...
The Squeezebox Radio can be powered by an optional proprietary battery pack, made available in March 2010. When running off Logitech Media Server, two Squeezebox Radios can be synchronized and set to play one stereo channel each, thus working as a stereo device. Also, by using headphones one can use one single Squeezebox Radio as a stereo device.
1947 – JBL has a 15" speaker (38 cm), model D-130, using for the first time a 4" (100 mm) voice coil in a speaker cone; 1949 – James. B. Lansing dies of suicide; William Thomas became president of the company; 1954 – The 375 compression engine is the first 4-inch engine sold; its response extends to 9 kHz
The first 2.1 audio system from Bose was the "Lifestyle 10", which was released in 1990. The Lifestyle 10 included a single-disk CD player, an AM/FM radio and "Zone 2" RCA outputs which could be configured to output a different source to the primary speakers.
Wireless speakers are loudspeakers that receive audio signals using radio frequency (RF) waves rather than over audio cables. The two most popular RF frequencies that support audio transmission to wireless loudspeakers include a variation of WiFi IEEE 802.11 , while others depend on Bluetooth to transmit audio data to the receiving speaker.
Goodmans launched their first DAB digital radio products at the end of 2002, including the GPS280 portable stereo CD player. [11] By the new century, Goodmans products had shifted in large part away from audio to set-top boxes during the rise of digital TV. [12] They launched their first HD ready TV on 27 July 2007.