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In the 1990s, Bose manufactured a "Lifestyle 901" system that integrated two 901 speakers, the 901 Active Equalizer, and a Lifestyle stereo receiver that integrated an A/M-F/M radio tuner and a CD player, as well as a remote control.
Bose argued that the listener's perception was the best measure of audio quality. [12] [13] [14] Also in 1968, the company introduced the Bose 901 stereo speaker system, which used eight mid-range drivers pointing toward the wall behind the speaker, and a ninth driver toward the listener. This design aimed to achieve a dominance of reflected ...
The "Bose Wave/PC" was released in 2001 as a device to play mp3 files and digital radio from a Windows PC. [13] [14] It was based on the Wave Radio, sent commands to the computer using a serial data cable and received audio via an analogue output from the computer's sound card. [15] Later models used a USB for transferring both commands and ...
The magazine Consumer Reports had published in 1970 a review of an unusual [clarification needed] loudspeaker system manufactured by Bose Corporation, called the Bose 901. The review expressed skepticism of the system's quality and recommended that consumers delay purchase until they had investigated for themselves whether the loudspeaker ...
Schematic of an AGC used in the analog telephone network; the feedback from output level to gain is effected via a Vactrol resistive opto-isolator.. Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input.
An adaptive equalizer is an equalizer that automatically adapts to time-varying properties of the communication channel. [1] It is frequently used with coherent modulations such as phase-shift keying, mitigating the effects of multipath propagation and Doppler spreading. Adaptive equalizers are a subclass of adaptive filters.
For example, the RIAA pre-emphasis in the popular Neumann SAB 74B equalizer applies a second-order roll off at 49.9 kHz, implemented by a Butterworth (maximally flat) active filter, plus an additional pole at 482 kHz. [2] This cannot be compensated for by a simple zero even if it were necessary, and in any case, other amplifiers will differ.
Equalizer (Datel), a game-hacking cheat cartridge by Datel "Equalizer" (k-os song), a song by hip hop artist k-os; The Equalizer, an American spy thriller television and film franchise including: The Equalizer (1985 TV series) The Equalizer (2021 TV series), reboot of the 1985 TV series; The Equalizer, a 2014 film loosely based on the 1985 TV ...