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AM STEREO

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Quadraphonic Receiver with Joystick Remote Control, CD-4 Quad

It's hard to believe now, but there was surround sound before Dolby Stereo and digital AC3! Back in the early 1970s, when vinyl records reigned supreme, there was something of an audio boom. Looking for something to sell after stereo, Japanese manufacturers turned to a surround-sound system that employed two front speakers and two rear speakers for improved depth. Or, more specifically, three incompatible systems. VHS inventor JVC brought us Compatible Discrete-4, a format with fo

POOLO

POOLO

 

AM STEREO RULES!C-QUAM

The Kahn POWER-side Expander is a type of modulation technology which was developed by Kahn/Hazeltine Independent Side Band AM STEREO guru Leonard Kahn . Basically, it's purpose is to improve the transmission of signals by broadcasters and the subsequent reception of those signals by listeners. Here's how it works: a normal AM transmission has a carrier and two sidebands: a lower and an upper one; AM single sideband (SSB) transmission, on the other hand, has a carrier and only one sideband.

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