Advent500usedAdvent Model 500 SoundSpace ControlAdvent Model 500 SoundSpace Control -----Powers on normally, mostly kept in storage. World’s First Ever Serious Surrond Sound SystemThis Advent unit made in 1979 takes normal two channel stereo so...100.00

Advent Model 500 SoundSpace Control

Listing ID: lis9113f Classified 
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Condition
7/10
Payment methods
Ships fromWake Forest , 27587
Ships toWorldwide
Package dimensions18.5" × 13.5" × 6.0" (15.0 lbs.)
Shipping carrierFedEx
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Original accessoriesBox
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Advent Model 500 SoundSpace Control -----Powers on normally, mostly kept in storage. 

World’s First Ever Serious Surrond Sound System

This Advent unit made in 1979 takes normal two channel stereo sound, feeds an unaltered signal to your two front speakers and delays a signal to your amp controlling your two rear speakers to create a sense of spaciousness and reverb. (It does not process 5.1 surround sound.)

Find more information and original Ad at link below: 


https://www.americanradiohistory.com/hd2/IDX-Audio/Archive-Audio-IDX/IDX/70s/Audio-1979-02-OCR-Page-0077.pdf#search=%22advent%20soundspace%20control%22

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