[–] simonblack 5y ago ↗ The 1970s rang. They want their sound-panels back.The use of sound-panels was quite common in the 1970s. (http://www.audioimprov.com/AudioImprov/Speakers/Entries/2012...)They weren't as obtrusive as most of the large speaker systems (https://i.imgur.com/9tVVsY1.jpeg) of the dayOn the other hand, they weren't as good, either. Which is very likely why they more or less disappeared from use.
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[ 4.5 ms ] story [ 21.4 ms ] threadThe use of sound-panels was quite common in the 1970s. (http://www.audioimprov.com/AudioImprov/Speakers/Entries/2012...)
They weren't as obtrusive as most of the large speaker systems (https://i.imgur.com/9tVVsY1.jpeg) of the day
On the other hand, they weren't as good, either. Which is very likely why they more or less disappeared from use.