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AM stereo is a term given to a series of mutually incompatible techniques for radio broadcasting stereo audio in the AM band in a manner that is compatible with standard AM receivers. There are two main classes of systems: independent sideband (ISB) systems, promoted principally by American broadcast engineer Leonard R. Kahn; and quadrature amplitude modulation (QAM) multiplexing systems (conceptually closer to FM stereo).
Initially adopted by many commercial AM broadcasters in the mid to late 1980s, AM stereo broadcasting soon began to decline due to a lack of receivers (most "AM/FM stereo" radios only receive in stereo on FM), a growing exodus of music broadcasters to FM, concentration of ownership of the few remaining stations in the hands of large corporations and the removal of music from AM stations in favor of news/talk or sports broadcasting. By 2001, most of the former AM stereo broadcasters were no longer stereo or had left the AM band entirely.
AMstereo is a term given to a series of mutually incompatible techniques for radio broadcasting stereo audio in the AM band in a manner that is compatible...
of AMstereo, however overall there was limited adoption of AMstereo worldwide, and interest declined after 1990. With the continued migration of AM stations...
Stereophonic sound, or more commonly stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This...
the radio will decode C-QUAM AMstereo, whereas a set labelled "FM Stereo/AMStereo" or "AMAX Stereo" will support AMstereo. In September 2002, the United...
The following is a list of AM radio stations transmitting in C-QUAM stereo throughout the world, which can be sorted by their call signs, frequencies...
CAM-D C-QUAM Digital Radio Mondiale HD Radio Notes: Guam is a United States territory. Guam is a United States territory. Guam is a United States territory...
stations broadcast in stereo, while most AM radio stations broadcast in mono. (Although an AMstereo broadcast standard exists, few AM stations are equipped...
While AMstereo transmitters and receivers exist, they have not achieved the popularity of FM stereo. Most modern radios are able to receive both AM and...
experiment without fanfare. As at September 2020 the only AM station still broadcasting in AMstereo is 4WK (963 kHz). By convention, a broadcaster's "spot...
the "La Bonita 610 AM" branding. WPLO is the Atlanta area's last remaining analog AMstereo radio station using the C-QUAM AMStereo system. Official WPLO...
with each other. Bob Carver created an AMstereo tuner employing notch filtering that demonstrated that an AM broadcast can meet or exceed the 15 kHz...
dedicated country stations on the AM dial in North America, as well as one of the few to do so in C-QUAM AMStereo. The AM radio station has been on the air...
AM radio-quality audio. This transmission system used 75 μs audio pre-emphasis like the main monaural audio and subsequently the multiplexed stereo audio...
DWPM (630 AM), broadcasting as Radyo 630, is a commercial news/talk radio station owned by Baycomms Broadcasting Corporation and operated by Media Serbisyo...
the missing carrier wave from the 38 kHz signal. For AM broadcasting, different analog (AMstereo) and digital (HD Radio) methods are used to produce stereophonic...
unfavourable review of Magical Mystery Tour, Rex Reed of HiFi/Stereo Review said that "I Am the Walrus" "defies any kind of description known to civilized...
adopt AMstereo. Beginning with the Harris System and later switching to the C-QUAM system. KYMN has since discontinued broadcasting in AMstereo. A new...
System. The fourth harmonic (76 kHz) is used for Data Radio Channel. In AMstereo, the bandwidth is too narrow to accommodate subcarriers, so the modulation...
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