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  2. Hafler circuit - Wikipedia

    en.wikipedia.org/wiki/Hafler_circuit

    In the early and mid-1970s, for example, Ferguson made two-channel receivers with a built-in Hafler circuit. Philips had a similar circuit in their two-channel receivers. . Many receivers from middle price brands had such circuits, but often without a volume control for the rear chan

  3. Loudness compensation - Wikipedia

    en.wikipedia.org/wiki/Loudness_compensation

    Loudness compensation, or simply loudness, is a setting found on some hi-fi equipment that increases the level of the high and low frequencies. [1] This is intended to be used while listening at low-volume levels, to compensate for the fact that as the loudness of audio decreases, the ear's lower sensitivity to extreme high and low frequencies ...

  4. List of software-defined radios - Wikipedia

    en.wikipedia.org/wiki/List_of_software-defined...

    FMC (to Xilinx board) then USB 2.0 or Gigabit Ethernet. Yes Yes Yes AD-FMCOMMS5-EBZ [13] [14] [8] Pre-built Active 70 MHz – 6 GHz 54 MHz due to filter 12 12 Yes 61.44 MSPS 4/4 FMC (to Xilinx board) then USB 2.0 or Gigabit Ethernet. Yes Yes Yes ADALM-PLUTO [15] Pre-built Active 325 MHz – 3.8 GHz (70 MHz – 6 GHz with software modification [16])

  5. Radio receiver design - Wikipedia

    en.wikipedia.org/wiki/Radio_receiver_design

    The term radio receiver is understood in this article to mean any device which is intended to receive a radio signal in order to generate useful information from the signal, most notably a recreation of the so-called baseband signal (such as audio) which modulated the radio signal at the time of transmission in a communications or broadcast system.

  6. Tone control circuit - Wikipedia

    en.wikipedia.org/wiki/Tone_control_circuit

    A tone control circuit is an electronic circuit that consists of a network of filters which modify the signal before it is fed to speakers, headphones or recording devices by way of an amplifier. Tone controls are found on many sound systems: radios , portable music players , boomboxes , public address systems , and musical instrument amplifiers .

  7. Tuner (radio) - Wikipedia

    en.wikipedia.org/wiki/Tuner_(radio)

    Marantz 2050L AM/FM stereo tuner (USA; 1978-1980) [1]. In electronics and radio, a tuner is a type of receiver subsystem that receives RF transmissions, such as AM or FM broadcasts, and converts the selected carrier frequency into a form suitable for further processing or output, such as to an amplifier or loudspeaker.